kenwood tm-271a 271e service manual · service manual circuit description ... plle eepck ic101 cpu...

© 2003-10 PRINTED IN JAPANB51-8663-00 (N) 743

VHF FM TRANSCEIVER

TM-271A/271ESERVICE MANUAL

CIRCUIT DESCRIPTION ............................ 2

SEMICONDUCTOR DATA ........................ 8

COMPONENTS DESCRIPTION ................ 9

PARTS LIST ............................................. 10

EXPLODED VIEW.................................... 17

PACKING ................................................. 18

RESETTING THE TRANSCEIVER ........... 19

ADJUSTMENT ........................................ 20

TERMINAL FUNCTION ........................... 27

PC BOARD

DISPLAY UNIT (X54-3450-10) ............ 28

TX-RX UNIT (X57-685X-XX)............... 30

SCHEMATIC DIAGRAM.......................... 34

BLOCK DIAGRAM ................................... 38

LEVEL DIAGRAM .................................... 40

SPECIFICATION ................... BACK COVER

CONTENTS

Microphone(T91-0624-05)

Cabinet(A01-2193-01)

Panel assy(A62-1088-03)

Knob (Encoder)(K29-9293-03)

Knob (Volume)(K29-9292-03)

Key top(K29-9291-01)

Microphone(T91-0641-05)

Cabinet(A01-2193-01)

Panel assy(A62-1088-03)

Knob (Encoder)(K29-9293-03)

Knob (Volume)(K29-9292-03)

Key top(K29-9291-01)

TM-271A (M2,M4)

TM-271A/E (K,M3,E)

Administrator

Nuovo timbro

TM-271A/271E

2

Frequency ConfigurationThe receiver utilizes double conversion. The first IF is

49.95MHz and the second IF is 450kHz. The first local oscil-lator signal is supplied from the PLL circuit.

The PLL circuit in the transmitter generates the necessaryfrequencies. Figure 1 shows the frequencies.

CIRCUIT DESCRIPTION

Receiver SystemThe receiver is double conversion superheterodyne. The

frequency configuration is shown in Figure 1.

Front-end RF AmplifierAn incoming signal from the antenna is applied to an RF

amplifier (Q353) after passing through a transmit/receiveswitch circuit (D603, D605 are off) and a band pass filter(L357, L356 and varactor diodes : D353, D354). After thesignal is amplified (Q353), the signal is filtered through a bandpass filter (L354, L355 and varactor diodes: D351, D352) toeliminate unwanted signals before it is passed to the firstmixer.

The voltage of these diodes are controlled by tracking theCPU (IC101) center frequency of the band pass filter. (SeeFig. 2.)

First MixerThe signal from the RF amplifier is heterodyned with the

first local oscillator signal from the PLL frequency synthesizercircuit at the first mixer (Q352) to create a 49.95MHz firstintermediate frequency (1st IF) signal. The first IF signal isthen fed through one pair of monolithic crystal filter (MCF :XF351) to further remove spurious signals.

ANTSW

RFAMP

1stMIX

AFPA

TCXO

MICAMP

X3multiply

RFAMP

POWERAMP

CF 450kHz

MCF49.95MHz

IF SYSTEM

PLL/VCO

16.8MHz

50.4MHz

ANT

RX

TX

SP

MIC1/2

Fig. 1 Frequency configuration

IF AmplifierThe first IF signal is amplified by Q351, and then goes to

IC301 (FM processing IC). The signal is heterodyned againwith a second local oscillator signal within IC301 to create a450kHz second IF signal. The second IF signal is then fedthrough a 450kHz ceramic filter (Wide : CF301, Narrow :CF302) to further eliminate unwanted signals before it is am-plified and FM detected in IC301.

Item Rating

Nominal center frequency 49.95MHz

Pass bandwidth ±5.0kHz or more at 3dB

35dB stop bandwidth ±20.0kHz or less

Ripple 1.0dB or less

Insertion loss 5.0dB or less

Guaranteed attenuation 80dB or more at fo±1MHz

Spurious 40dB or more

Terminal impedance 350Ω / 5.5pF

Table 1 Crystal filter (L71-0620-05) : XF351

Item Rating

Nominal center frequency 450kHz

6dB bandwidth ±6.0kHz or more

50dB bandwidth ±12.5kHz or less



Guaranteed attenuation 35.0dB or more within fo±100kHz

Terminal impedance 2.0kΩ

Table 2 Ceramic filter (L72-0993-05) : CF301

Item Rating

Nominal center frequency 450kHz

6dB bandwidth ±4.5kHz or more

50dB bandwidth ±10.0kHz or less



Guaranteed attenuation 60.0dB or more within fo±100kHz

Terminal impedance 2.0kΩ

Table 3 Ceramic filter (L72-0999-05) : CF302

ANTL357,356D353,354

BPFQ353

RF AMPQ351

IF AMPIC161

D/A CONVERTERQ352MIX

XF351MCF

D602D603D605ANTSW

IC161D/A

IC203DC AMP

Q302X3 multiply

IC4021/2 divider

X401TCXO

IC301IF system

1st local OSC (VCO/PLL)

W/NO(EVOL2)

CF301 (Wide)

CF302 (Narrow)

TV

CPU

L354,355D351,352

BPF

Fig. 2 Receiver system

TM-271A/271E

3

Wide/Narrow Switching CircuitThe Wide port (pin 65) and Narrow port (pin 64) of the CPU

is used to switch between ceramic filters. When the Wideport is high, the ceramic filter SW diodes (D303, D302) causeCF301 to turn on to receive a Wide signal.

When the Narrow port is high, the ceramic filter SW di-odes (D303, D302) cause CF302 to turn on to receive a Nar-row signal. (See Fig. 3.)

AF Signal SystemThe detection signal from IF IC (IC301) goes to D/A con-

verter (IC161) to adjust the gain and is output to AF filter(IC251) for characterizing the signal. The AF signal outputfrom IC251 and the DTMF signal, BEEP signal are summedand the resulting signal goes to the D/A converter (IC161).The AFO output level is adjusted by the D/A converter. Thesignal output from the D/A converter is input to the audiopower amplifier (IC252). The AF signal from IC252 switchesbetween the internal speaker and speaker jack (J1) output.(See Fig. 4.)

Squelch CircuitThe detection output from the FM IF IC (IC301) passes

through a noise amplifier (Q301) to detect noise. A voltage isapplied to the CPU (IC101). The CPU controls squelch ac-cording to the voltage (SQIN) level. The signal from the RSSIpin of IC301 is used for S-meter. The electric field strength ofthe receive signal can be known before the SQIN voltage isinput to the CPU, and the scan stop speed is improved.

NarrowIC101 64pin

IF_IN MIX_O

IC301IF System

CF302(Narrow)

CF301(Wide)

R32

0

R31

9

R317

R318

D303 D302

WideIC101 65pin

AFFilter

D/ACONV.

D/ACONV.

IC161 IC251 IC161W/NO(EVOL2)

AF PA

IC252 SP

IF IC

IC301

Q301NOISE AMP D301IC301 IC101

AFO

RSSI

DETCPUIF

SYSTEM

SQIN

RSSI

Fig. 3 Wide/Narrow switching circuit

Fig. 4 AF signal system

Fig. 5 Squelch circuit

PLL Frequency SynthesizerThe PLL circuit generates the first local oscillator signal for

reception and the RF signal for transmission.

PLLThe frequency step of the PLL circuit is 5 or 6.25kHz. A

16.8MHz reference oscillator signal is divided at IC401 by afixed counter to produce the 5 or 6.25kHz reference fre-quency. The voltage controlled oscillator (VCO) output signalis buffer amplified by Q410, then divided in IC401 by a dual-module programmable counter. The divided signal is com-pared in phase with the 5 or 6.25kHz reference signal in thephase comparator in IC401. The output signal from thephase comparator is filtered through a low-pass filter andpassed to the VCO to control the oscillator frequency. (SeeFig. 6.)

VCOThe operating frequency is generated by Q406 in transmit

mode and Q405 in receive mode. The oscillator frequency iscontrolled by applying the VCO control voltage, obtainedfrom the phase comparator, to the varactor diodes (D405 andD406 in transmit mode and D403 and D404 in receive mode).The TX/RX pin is set high in receive mode causing Q408 andQ407 to turn Q406 off, and turn Q405 on. The TX/RX pin isset low in transmit mode. The outputs from Q405 and Q406are amplified by Q410 and sent to the RF amplifiers. (See Fig.6.)

D405,406

Q406TX VCO

Q410BUFFAMP

D403,404

Q405RX VCO

Q407,408T/R SW

Chargepump

LPF

Phasecomparator

1/M

1/N5kHz/6.25kHz

5kHz/6.25kHz

REFOSC

16.8MHz

PLLDATA

IC401 : PLL ICQ404AMP

RF amplifiers

Q402,403

TX/RX (CPU)

Fig. 6 PLL circuit

CIRCUIT DESCRIPTION

TM-271A/271E

4

Unlock CircuitDuring reception, the 8RC signal goes high, the 8TC signal

goes low, and Q34 turns on. Q33 turns on and a voltage isapplied to 8R. During transmission, the 8RC signal goes low,the 8TC signal goes high and Q36 turns on. Q35 turns on anda voltage is applied to 8T.

The CPU monitors the PLL (IC401) LD signal directly.When the PLL is unlocked during transmission, the PLL LDsignal goes low. The CPU detects this signal and makes the8TC signal low. When the 8TC signal goes low, no voltage isapplied to 8T, and no signal is transmitted. (See Fig. 7.)

IC101CPU

Q34SW

Q33SW

IC401PLL

Q36SW

Q35SW

LD

8RC

8C

8R 8T

8TC

PLL lock: LD “H”

Fig. 7 Unlock circuit

Transmitter System

OutlineThe transmitter circuit produces and amplifies the desired

frequency directly. It FM-modulates the carrier signal bymeans of a varicap diode.

Power Amplifier CircuitThe transmit output signal from the VCO passes through

the transmission/reception selection diode (D409) and ampli-fied by Q501, Q502 and Q503. The amplified signal goes tothe final amplifier (Q504) through a low-pass filter. The low-pass filter removes unwanted high-frequency harmonic com-ponents, and the resulting signal is transmitted through theantenna terminal. (See Fig. 8.)

APC CircuitThe automatic transmission power control (APC) circuit

detects part of a final amplifier output with a diode (D606,D607) and applies a voltage to IC501. IC501 compares theAPC control voltage (PC) generated by the D/A converter(IC161) and DC amplifier (IC203) with the detection outputvoltage. IC501 generates the voltage to control Q503 andQ504 and stabilizes transmission output.

The APC circuit is configured to protect over current ofQ503 and Q504 due to fluctuations of the load at the antennaend and to stabilize transmission output at voltage and tem-perature variations. (See Fig. 9.)

RFAMP

Q501

DRIVEAMP

Q503

FINALAMP

Q504PRE

DRIVEAMP

Q502

DCAMP

IC203

ANTSW

D602,D603D605

LPF

ANT

POWERDET

D606D607IC501

VR601APC

CONTROL

D409

IC161(PC/TVO)

(PC)

Q411

RF AMP

Q501

RF AMP

Q502

PREDRIVE AMP

Q503

ANT

DRIVEAMP

Q504

FINALAMP

IC402

1/2DIVIDER

IC161 Q406

D/A CONVERTER

D/A CONVERTER

D/A CONVERTER

X401

TCXO16.8MHz

VCO

IC401

PLL

Q410

BUFFER

Q404

RF AMP

IC203

BUFFER

IC101

IC161

MIC KEYINPUT CPU

IC161

IC203

SUMAMP

IC202IC201MIC

MIC/IDC SPLATTERFILTER

Fig. 9 APC circuit

Fig. 8 Transmitter system

CIRCUIT DESCRIPTION

TM-271A/271E

5

Control CircuitThe CPU carries out the following tasks (See Fig. 10.):

1) Controls the WIDE, NARROW, TX/RX outputs.2) Adjusts the AF signal level of the AF filter (IC251) and

turns the filter select compounder on or off.3) Controls the display unit.4) Controls the PLL (IC401).5) Controls the D/A converter (IC161) and adjusts the vol-

ume, modulation and transmission power.

Memory CircuitThe transceiver has an 64k-bit EEPROM (IC66). The

EEPROM contains adjustment data. The CPU (IC101) con-trols the EEPROM through three serial data lines. (See Fig.11.)

IC161D/A

converter

IC401PLL

IC101CPU

LDDTCK

PLLE

EEPCK

IC101CPU

IC66EEPROM

EEPSDT

EEPWP

Display CircuitThe CPU (IC101) controls the display LCD and LEDs.

When power is on, the LCD driver will use the BL line to con-trol the LCD illumination and key backlight LEDs.

The brightness function is controlled by the switch Q12.The LCD driver (IC3) and CPU (IC101) communicate throughthe CE, CL, DI, DO lines. (See Fig. 12.)

Key Matrix CircuitThe TM-271 front panel has function keys. Each of them

is connected to a cross point of a matrix of the KI1 to KI3 andKSI to KS2 ports of the LCD driver.

The LCD driver monitors the status of the KI1 to KI3 andKS1 to KS2 ports. If the state of one of the ports changes,the LCD driver assumes that the key at the matrix point corre-sponding to that port has been pressed.

EncodeThe DCS and CTCSS signals are output from QT/DQT of

the CPU (IC101) and summed with the external pin DI line bythe summing amplifier (IC203) and the resulting signal goesto the D/A converter (IC161). The DTMF signal is output fromDTMF pin of the CPU and summed with a MIC signal by thesumming amplifier (IC203), and the resulting signal goes tothe D/A converter (IC161).

The D/A converter (IC161) adjusts the MOD level and thebalance between the MOD and CTCSS/DCS levels. Part of aCTCSS/DCS signal is summed with MOD and the resultingsignal goes to the VCOMOD pin of the VCO. This signal isapplied to a varicap diode in the VCO for direct FM modula-tion.

IC3LCD

driver

KI1KI2KI3

KS2KS1

FUNC

REV

CALL

VFO

MRMHz(Encoder)

X401TCXO

IC161D/A VCO

IC203SUMAMP

IC203SUMAMP

IC401PLL

TCXOMOD

VCOMOD

Amp

DI

QT/DQT(CPU1)

DTMO(EVOL15)

IC101CPU

TONE

DTMF

Fig. 10 Control circuit

Fig. 11 Memory circuit

Q10SW

Q6SW

IC101CPU

D2~D4

Q9SW

D19~D30

Q12SW

IC3LCD

driver

CECLDI

DOBL

COM0~COM3SEG0~SEG30

LCD

BRI

Fig. 12 Display circuit

Fig. 13 Key matrix circuit

Fig. 14 Encoder

CIRCUIT DESCRIPTION

TM-271A/271E

6

Decode

• CTCSS/DCSThe signal (W/NO (EVOL2)) goes to DTMF IN (pin 95) of

CPU (IC101). The CTCSS/DCS signal will pass through thelow-pass filters in the CPU (IC101) and be decoded within theCPU (IC101). The DTMF signal will be decoded within theCPU (IC101).

D/A ConverterThe D/A converter (IC161) is used to adjust MO modula-

tion, AF volume, TV voltage, FC reference voltage, and PCPOWER CONTROL voltage level.

Adjustment values are sent from the CPU as serial data.The D/A converter has a resolution of 256 and the followingrelationship is valid:

D/A output = (Vin – VDAref) / 256 x n + VDArefVin: Analog inputVDAref: D/A reference voltagen: Serial data value from the microprocessor (CPU)

Power Supply CircuitWhen the power switch on the display unit is pressed, the

power port on the display unit which is connected port 17(POWER), goes low, then port 82 (SBC) goes high, Q32 turnson, SB SW (Q31) turns on and power (SB) is supplied to theradio.

When the DC power supplied to the radio, the voltageregulator IC (IC33) supply into the CPU VDD and reset voltagedetect IC (IC34). IC34 will generate signal (RESET) in to thereset terminal on the CPU (IC101) to carry out a power ONreset. If DC power is less than about 9.5V, the radio is unableto power on.

When the DC power voltage deceases from normal volt-age, the INT voltage detector IC (IC35) will set to high on CPUport 18 (INT) if B line will became less than about 9.5V. ThenCPU send to EEPROM (IC66) the backup data and go intoSTOP mode.

This circuit has an overvoltage protection circuit. If a DCvoltage of 18V or higher is applied to the base of Q61, thisvoltage turns Q61 on and will set to high on CPU port 18(INT). Then CPU send to EEPROM (IC66) the backup dataand go into stop mode. (See Fig. 16.)

IC101CPU

DTMF IN W/NO (EVOL2)95

Q71SW

Q31SW

Q32SW

Q61SW

IC33AVR

D61D62

B

IC34RST

SBC

IGN

R77

R76

R39

R40

INT

5MBATT

IC101CPU

POWERSW

POWER

RE

SE

T

5M

IC35INT

SB

IGN

Fig. 15 Decode

Fig. 16 Power supply circuit

CIRCUIT DESCRIPTION

Data Terminal and Peripheral CircuitsCN2 (data terminal) is the data communications terminal

on the TX/RX PCB. It handles transmission control, data in-put/output, and squelch signals.

There are two data communications modes : 9600bpsmode and 1200bps mode. Unlike with 1200bps AFSK, withthis type of high-speed modulation, frequency modulation iscarried out after the digital base band signals (rectangularwave) are passed through a band limiting filter. For 9600bpsGMSK for example, compared to 4800Hz signals (nearly sinewave signals passed through a filter), these signals have ahissing sound like digital modulation when listened to by ear.Different types of modulation, such as GMSK is distin-guished by the type of band limiting filter.

Pin Pin Specification

No. Name

1 PKD bps switching 1200bps 9600bps

Modulation input 400mVp-p 4Vp-p

Frequency shift 3±0.5kHz 2.2±0.5kHz

4 PR9 Output level 500mVp-p/10kΩ

Always output during reception

5 PR1 Output level 500mVp-p/10kΩ

Not output when squelch off

Table 4 Data terminal input/output level

TM-271A/271E

7

Transmission SignalsTransmission modulation signals enter from PKD of the

data terminal (CN2). The path to the modulation depends onwhether communications are 1200bps or 9600bps mode.

For 1200bps mode, the transmission modulation signalsfrom single analog switch (IC204) pass through MIC amplifier(IC201,202) and summing amplifier (IC203), and go to VCO(X401) through D/A converter (IC161).

For 9600bps mode, the transmission modulation signalsfrom single analog switch (IC205) pass through summingamplifier (IC303), go to TCXO (X401) and VCO through D/Aconverter (IC161). (See Fig. 17.)

Reception SignalsPR9 is the 9600bps data communications reception out-

put. It outputs the FM detection circuit output through an AFfilter (IC251). These signals are always output whether thesquelch is open or closed.

PR1 is the 1200bps data communications reception out-put. It outputs the FM detection circuit output through an AFfilter (IC251). Output is controlled with the mute switch(Q252) according to whether squelch is open or closed. (SeeFig. 17.)

Squelch Signal Output CircuitThe squelch circuits is input to the TNC to prevents con-

flicts from occurring between simultaneous receive modeand transmit mode traffic during packet communications(only during 1200bps). The signal is output from pin 29 ofIC101 to the data terminal. The logic is as shown in the tablebelow.

SQC terminal output L : SQ CLOSE

CN2 H : SQ BUSY

IC204Analogswitch

IC201,202MIC amp

IC203Sum amp

IC205Analogswitch

IC251AF filter

7675

IC101CPU

1200bps

9600bpsVCO, TCXO, D/A converter

D/A converterQ252

Mute SWD6

D5

PKS (CPU) pin 30

SQC (CPU) pin 29

PKD

PR9

PR1

PKS

SQC

CN2

CIRCUIT DESCRIPTION

Fog. 17 Data terminal and peripheral circuits

TM-271A/271E

8

SEMICONDUCTOR DATA

Terminal Function

Pin No. Name I/O Function

1 TONE O CTCSS/DCS/Clone output

2 DTMF O DTMF/BEEP/1750Hz output

3 PLLE O PLL IC chip select

4,5 NC I

6 GND - GND.

7 CNVSS -

8 EVLLD O

9 BSHIFT O Beat shift

10 RESET - Reset

11 XOUT - X’tal (8MHz)

12 VSS - GND

13 XIN - X’tal (8MHz)

14 VCC - +5V

15 NMI - (Input only)

16 NC I

17 POWER I Power key input

18 INT I µcom stop

19 NC I

20 TX/RX O TX/RX

21 UL I PLL unlock detect

22,23 NC I

24 EEPSDT I/O EEPROM data

25 EEPCK O EEPROM clock

26 EEPWP O EEPROM write protect

27,28 NC I (Nch open drain)

29 SQC O Squelch signal output for TNC

(TxD for flash)

30 PKS I PTT input for TNC (RxD for flash)

31 CLKFLS I (GND)

32 BSYFLS O (Vcc)

33 TXD O To PC

34 RXD I From PC

35 PTT I PTT input

36~38 NC I

39 EMPFLS I/O (GND)

40~43 NC I

44 CEFLS I/O (Vcc)

45~49 NC I

50 AFM O AF mute

51 SPM O Speaker mute

52 AMPSW O AF AMP switch

Pin No. Name I/O Function

53 DT O Common data

54 CK O Common clock

55 NC I

56 DST1 I Destination 1

57~59 DST2~DST4 I Destination 2~4

60 VCC - +5V

61 NC I

62 VSS - GND

63 ADJ I For adjustment mode

64 NARROW O Wide/Narrow 2

65 WIDE O Wide/Narow

66,67 NC I

68 LCDCL O Clock for LCD

69 LCDCE O Chip enable for LCD

70 LCDDO O Output data to LCD

71 LCDDI I Input data from LCD

72 NC I

73 ENCB I Encoder input B

74 ENCA I Encoder input A

75 TNC9600 O TNC speed H : 9600, L : 1200

76 TNC1200 O TNC speed L : 9600, H : 1200

77 MICMT O MIC mute

78 NC I NC

79 8RC O 8R control

80 8TC O 8T control

81 NC I

82 SBC O Battery switch

83~85 NC I

86 CM I/O MIC key check

87 I For AMR DTMF keypad MIC

88 I For AMR DTMF keypad MIC

89 VOL I Volume encoder

90 TEMP2 I Temperature 2

91 TEMP1 I Temperature 1

92 RSSI I RSSI input

93 SQIN I Squelch input

94 AVSS - GND

95 DTMF IN I CTCSS/DCS/Clone/1050Hz input

96 VREF - +5V

97 AVCC - +5V

98~100 NC I

Microprocessor : 30622MAA-B85GP (TX-RX Unit IC101)

TM-271A/271E

9

Display Unit (X54-3450-10)

Ref. No. Parts name Description

IC3 IC LCD controller

Q6 Transistor DC switch

Q9 Transistor LCD backlit switch

Q10 Transistor Key backlit switch

Q12 Transistor Brightness function switch

D2~4 LED Key backlit

D19~30 LED LCD backlit

D31 Diode Reverse connection protection

TX-RX Unit (X57-685X-XX)


IC31 IC Voltage regulator (8C)

IC32 IC Voltage regulator (5C)

IC33 IC Voltage regulator (5M)

IC34 IC Voltage detector (reset)

IC35 IC Voltage detector (int)

IC66 IC EEPROM

IC101 IC CPU

IC161 IC Digital potentiometer

IC201 IC MIC amplifier / IDC

IC202 IC MIC amplifier / Splatter filter

IC203 IC Buffer amplifier / SUM amplifier

/ DC amplifier / 1/2 Vcc

IC204,205 IC Single analog switch

IC251 IC Audio filter

IC252 IC Audio amplifier

IC301 IC FM demodulation

IC401 IC PLL synthesizer

IC402 IC Divider (Hetero)

IC501 IC APC controller

Q31,32 Transistor DC switch (SB) / Active when power is on

Q33,34 Transistor DC switch (8R) / Active while RX

Q35,36 Transistor DC switch (8T) / Active while TX

Q61 Transistor Over voltage detection / Active when

PS voltage is more than 18V

Q86,87 Transistor Beat shift / Active while beat shift is on

Q201 Transistor AGC / MIC mute

Q251 Transistor Buffer amplifier / RX audio

Q252,253 FET AF mute / Active while AFM is H

Q254 Digital transistor AF mute / Active while SPM is H

Q255 Transistor AF mute / Active while AMPSW is H

Q301 Transistor Noise amplifier / SQL amplifier


Q302 Transistor Buffer amplifier / 16.8MHz 3rd over tone

Q351 Transistor IF amplifier

Q352 FET Mixer

Q353 FET RF amplifier / LNA

Q354 Transistor PC/TV switch

Q402,403 Transistor Charge pump

Q404 Transistor RF amplifier / PLL F in

Q405 FET RX VCO

Q406 FET TX VCO

Q407 FET T/R switch

Q408 Transistor T/R switch

Q410 Transistor Buffer amplifier / Output of VCO

Q411 Transistor RF amplifier / Output of VCO

Q440 Transistor Lipple filter

Q501,502 Transistor RF amplifier / Drive stage

Q503 FET RF amplifier / Drive amplifier

Q504 FET RF amplifier / Final amplifier

D1 Diode Surge absorption / CM

D2 Diode Surge absorption / MIC key

D3 Diode Surge absorption / RXD

D4 Diode Surge absorption / PTT

D5 Diode Surge absorption / SQC

D6 Diode Surge absorption / PKS

D31 Diode Reverse connection protection

D32 Poly switch Current protection

D61,62 Diode Over voltage detection

D201 Diode OR gate / MIC mute, AGC

D202 Diode AGC

D251 Diode Limiter

D301 Diode Detection

D302,303 Diode IF switch (Wide/Narrow)

D351~354 Varicap RF BPF tuning

D401 Diode Ripple filter

D402 Diode Voltage dropped

D403,404 Varicap RX VCO

D405,406 Varicap TX VCO

D407 Varicap Modulation

D408 Diode Lipple filter

D409 Diode RF switch (TX/RX)

D501,502 Diode Temperature compensation

D503 Diode Voltage protection

D602,603 Diode ANT switch

D605 Diode ANT switch

D606,607 Diode APC voltage detect

D608 Diode Temperature compensation

COMPONENTS DESCRIPTION

TM-271A/271E

10

PARTS LIST New Parts. indicates safety critical components.Parts without Parts No. are not supplied.Les articles non mentionnes dans le Parts No. ne sont pas fournis.Teile ohne Parts No. werden nicht geliefert.

L : Scandinavia K : USA P : CanadaY : PX (Far East, Hawaii) T : England E : EuropeY : AAFES (Europe) X : Australia M : Other Areas

K,M2,M3,M4 : TM-271A

E : TM-271E

Ref. No. Address Parts No. Description Desti-nation

Newparts Ref. No. Address Parts No. Description Desti-

nationNewparts

TM-271A/E

DISPLAY UNIT (X54-3450-10)

1 1B A01-2193-01 CABINET2 3B A10-4048-21 CHASSIS3 3A A62-1088-03 PANEL ASSY

5 1D B62-1738-10 INSTRUCTION MANUAL K,M2,M35 1D B62-1738-10 INSTRUCTION MANUAL E5 1D B62-1739-10 INSTRUCTION MANUAL K,M2,E5 1D B62-1745-10 INSTRUCTION MANUAL M35 1D B62-1746-10 INSTRUCTION MANUAL M4

5 1D B62-1784-10 INSTRUCTION MANUAL E6 3B B72-2171-04 MODEL NAME PLATE K6 3B B72-2172-04 MODEL NAME PLATE M26 3B B72-2173-04 MODEL NAME PLATE M36 3B B72-2174-04 MODEL NAME PLATE M4

6 3B B72-2175-04 MODEL NAME PLATE E

8 3B E04-0167-05 RF COAXIAL PECEPTACLE (M) K,M2,M38 3B E04-0167-05 RF COAXIAL PECEPTACLE (M) M49 3B E04-0170-05 RF COAXIAL RECEPTACLE (N) E10 3C E30-2111-15 DC CORD ACCESSORY K,M2,M310 3C E30-2111-15 DC CORD ACCESSORY M4

11 3C E30-3452-05 DC CORD ACCESSORY E12 2B E30-7501-05 TNC CABLE E13 2B E30-7512-05 DC CORD (RADIO) K,M2,M313 2B E30-7512-05 DC CORD (RADIO) M414 2B E30-7513-05 DC CORD (RADIO) E

15 3A E37-1082-05 SPEAKER WIRE16 2A E37-1097-05 FLAT CABLE

17 3C F51-0024-05 FUSE (BLADE) (15A/32V) E18 2B F10-2449-01 SHIELDING COVER20 3C F51-0017-05 FUSE (630) (15A) K,M2,M320 3C F51-0017-05 FUSE (630) (15A) M4

23 2B G02-0894-04 EARTH SPRING (FINAL FET)24 2A G10-1324-04 FIBROUS SHEET (DISPLAY UNIT)25 3B G11-4127-14 RUBBER SHEET (CHASSIS)26 2B G11-4240-04 RUBBER SHEET (DRIVE FET)27 3B G13-1468-04 CUSHION (CHASSIS) K,M2,M3

27 3B G13-1468-04 CUSHION (CHASSIS) M428 3A G53-1525-03 PACKING (PANEL)29 2B G53-1542-03 PACKING (PHONE JACK)30 1B G53-1544-01 PACKING (SHIELDING COVER)31 1A G53-1548-02 GASKET

33 2C,1D H12-3112-05 PACKING FIXTURE34 3D H13-1190-02 CARTON BOARD36 1D H25-2341-04 PROTECTION BAG37 2D H52-1995-12 ITEM CARTON CASE K,M237 2D H52-2027-02 ITEM CARTON CASE M3

37 2D H52-2028-02 ITEM CARTON CASE M437 2D H52-2029-12 ITEM CARTON CASE E

39 3C J19-1584-05 MIC HOLDER ACCESSORY40 3D J29-0662-03 BRACKET ACCESSORY

42 3A K29-9291-01 KEY TOP43 3A K29-9292-03 KNOB (VOLUME)

44 3A K29-9293-03 KNOB (ENCODER)

A 2B N67-2608-46 PAN HEAD SEMS SCREWB 2A N80-2010-45 PAN HEAD TAPTITE SCREWC 2B,3B N87-2606-46 BRAZIER HEAD TAPTITE SCREWD 1B,2B N87-2614-46 BRAZIER HEAD TAPTITE SCREW46 3D N99-0395-05 SCREW SET ACCESSORY

48 3A T07-0739-05 SPEAKER49 2C T91-0624-05 MICROPHONE ACCESSORY M2,M450 2C T91-0641-05 MICROPHONE ACCESSORY K,M3,E

101 2A B11-1809-03 ILLUMINATION GUIDE (LCD)102 2A B38-0885-05 LCDD2-4 B30-2205-05 LED (YG)D19-30 B30-2205-05 LED (YG)

C4 CC73GCH1H101J CHIP C 100PF JC15,16 CC73GCH1H101J CHIP C 100PF JC19 CK73GB1H681K CHIP C 680PF KC22 CK73GB1H102K CHIP C 1000PF KC24 CK73GB1C104K CHIP C 0.10UF K

C25 CK73GB1H102K CHIP C 1000PF KC27 CK73GB1H102K CHIP C 1000PF KC30 CK73GB1C104K CHIP C 0.10UF KC31-33 CK73GB1H102K CHIP C 1000PF KC34,35 CK73GB1H472K CHIP C 4700PF K

C36 CK73GB0J105K CHIP C 1.0UF KC38 CK73GB1H471K CHIP C 470PF KC39,40 CK73GB1C104K CHIP C 0.10UF K

103 2A E29-1201-04 INTER CONNECTOR (LCD)CN1 E40-6005-05 FLAT CABLE CONNECTORJ1 E08-0877-05 MODULAR JACK

104 2A J21-8463-03 HARDWARE FIXTURE (LCD)

L1 L92-0138-05 FERRITE CHIP

CP1 R90-0724-05 MULTI-COMP 1K X4R8 RK73GB1J102J CHIP R 1.0K J 1/16WR10 RK73GB1J122J CHIP R 1.2K J 1/16WR21-23 RK73GB1J103J CHIP R 10K J 1/16WR25 RK73GB1J563J CHIP R 56K J 1/16W

R26 RK73GB1J392J CHIP R 3.9K J 1/16WR41 RK73FB2A560J CHIP R 56 J 1/10WR42 RK73GB1J272J CHIP R 2.7K J 1/16WR43 RK73GB1J821J CHIP R 820 J 1/16WR44 RK73GB1J183J CHIP R 18K J 1/16W

R45 RK73GB1J333J CHIP R 33K J 1/16WR46 RK73GB1J101J CHIP R 100 J 1/16WR47,48 RK73GB1J473J CHIP R 47K J 1/16WR49,50 RK73FB2A560J CHIP R 56 J 1/10WR51-53 R92-1252-05 CHIP R 0 OHM J 1/16W

R54 RK73FB2A560J CHIP R 56 J 1/10W


TM-271A/E

Administrator

Nuovo timbro

TM-271A/271E

11K,M2,M3,M4 : TM-271A

E : TM-271E

PARTS LIST



nationNewparts


TX-RX UNIT (X57-685X-XX)

R55 R92-1252-05 CHIP R 0 OHM J 1/16WVR1 R31-0646-05 VARIABLE RESISTOR

D31 1SS355 DIODEIC3 LC75854W MOS ICIC3 PT6554LQ MOS ICQ6 KRC102S DIGITAL TRANSISTORQ9 2SB1132(Q,R) TRANSISTOR

Q10 KRA225S DIGITAL TRANSISTORQ12 UMG3N TRANSISTORS1 W02-3665-05 ENCODER

C10 CK73GB1H102K CHIP C 1000PF KC13-20 CK73GB1H471K CHIP C 470PF KC28 CK73GB1H221K CHIP C 220PF KC29 CK73GB1H471K CHIP C 470PF KC30 CK73GB1H102K CHIP C 1000PF K

C33 CK73GB1H102K CHIP C 1000PF KC34 CE04EQ1E331M ELECTRO 330UF 25WVC35-38 CK73GB1H102K CHIP C 1000PF KC39,40 CK73GB1C104K CHIP C 0.10UF KC41 C92-0795-05 CHIP-TAN 22UF 10WV

C42 CK73GB1H103K CHIP C 0.010UF KC43-45 C92-0795-05 CHIP-TAN 22UF 10WVC49,50 CK73GB1H103K CHIP C 0.010UF KC51 C92-0589-05 CHIP-TAN 47UF 6.3WVC52,53 CK73GB1H102K CHIP C 1000PF K

C54,55 CK73GB1C104K CHIP C 0.10UF KC56 CK73GB1H102K CHIP C 1000PF KC61 CK73GB1H102K CHIP C 1000PF KC66 CK73GB1H102K CHIP C 1000PF KC82 CK73GB1H102K CHIP C 1000PF K

C83 CK73GB1C104K CHIP C 0.10UF KC87 CC73GCH1H030C CHIP C 3.0PF CC88,89 CC73GCH1H040C CHIP C 4.0PF CC90 CC73GCH1H030C CHIP C 3.0PF CC97,98 CK73GB1H102K CHIP C 1000PF K

C101 CK73GB1H102K CHIP C 1000PF KC102 CK73GB1C104K CHIP C 0.10UF KC104 CK73GB1C104K CHIP C 0.10UF KC128 CK73GB1H102K CHIP C 1000PF KC151 CK73GB1H182K CHIP C 1800PF K

C152 CK73GB1H392K CHIP C 3900PF KC161 CK73GB1H102K CHIP C 1000PF KC162 C92-0507-05 CHIP-TAN 4.7UF 6.3WVC163 CK73GB1H102K CHIP C 1000PF KC164 C92-0560-05 CHIP-TAN 10UF 6.3WV

C165 CK73GB1A105K CHIP C 1.0UF KC201 CK73GB1C104K CHIP C 0.10UF KC202 CK73GB1H102K CHIP C 1000PF KC203 CK73GB1C273K CHIP C 0.027UF K K,M2,M3C203 CK73GB1C273K CHIP C 0.027UF K M4

C203 CK73GB1C473K CHIP C 0.047UF K EC204 C92-0514-05 CHIP-TAN 2.2UF 10WVC205 CK73GB1C104K CHIP C 0.10UF KC206 CK73GB1H102K CHIP C 1000PF K K,M2,M3C206 CK73GB1H102K CHIP C 1000PF K M4

C206 CK73GB1H681K CHIP C 680PF K EC207 CK73GB1C223K CHIP C 0.022UF K K,M2,M3C207 CK73GB1C223K CHIP C 0.022UF K M4C207 CK73GB1C393K CHIP C 0.039UF K EC208 CK73GB1H103K CHIP C 0.010UF K

C209 CC73GCH1H680J CHIP C 68PF JC210 CK73GB1C104K CHIP C 0.10UF KC211 CK73GB1H821K CHIP C 820PF KC212 CK73GB1H122K CHIP C 1200PF KC213 CK73GB1H332K CHIP C 3300PF K

C214 CC73GCH1H151J CHIP C 150PF JC215 CK73GB1C104K CHIP C 0.10UF KC216 CC73GCH1H390J CHIP C 39PF JC217,218 C92-0560-05 CHIP-TAN 10UF 6.3WVC220 C92-0507-05 CHIP-TAN 4.7UF 6.3WV

C222 CK73GB1C104K CHIP C 0.10UF KC225 C92-0004-05 CHIP-TAN 1.0UF 16WVC226 CK73GB1H472K CHIP C 4700PF KC227 CK73GB1E103K CHIP C 0.010UF KC228 C92-0560-05 CHIP-TAN 10UF 6.3WV

C230 CK73GB1C104K CHIP C 0.10UF KC231,232 CK73GB1H102K CHIP C 1000PF KC233 C92-0507-05 CHIP-TAN 4.7UF 6.3WVC235 CK73GB1A105K CHIP C 1.0UF KC249 C92-0507-05 CHIP-TAN 4.7UF 6.3WV

C250 CK73GB1C104K CHIP C 0.10UF KC251 C92-0714-05 CHIP-TAN 4.7UF 6.3WVC252 CC73GCH1H390J CHIP C 39PF JC253,254 CK73GB1A224K CHIP C 0.22UF KC255 CK73GB1H822K CHIP C 8200PF K

C256 CK73GB1E183K CHIP C 0.018UF KC257 CK73GB1C393K CHIP C 0.039UF KC258-261 CK73GB1H103J CHIP C 0.010UF JC262 CK73GB1H102K CHIP C 1000PF KC263,264 CK73GB1C333K CHIP C 0.033UF K

C265 CK73GB1C104K CHIP C 0.10UF KC266 CK73GB1A105K CHIP C 1.0UF KC267 CK73GB1A474K CHIP C 0.47UF KC268 CK73GB1A105K CHIP C 1.0UF KC270 C92-0507-05 CHIP-TAN 4.7UF 6.3WV

C271 CK73GB1H122K CHIP C 1200PF KC272 CK73GB1H102K CHIP C 1000PF KC273 CK73GB1A105K CHIP C 1.0UF KC274 CK73FB1C224K CHIP C 0.22UF KC275 CK73GB1A105K CHIP C 1.0UF K

C276,277 CK73GB1H102K CHIP C 1000PF KC278 CK73GB1C104K CHIP C 0.10UF KC279 C92-0516-05 CHIP-TAN 4.7UF 16WVC280 C92-0040-05 CHIP-ELE 47UF 16WVC281 CK73GB1H102K CHIP C 1000PF K

C282 CE04EQ1E331M ELECTRO 330UF 25WVC283 CK73GB1H102K CHIP C 1000PF KC301 C92-0507-05 CHIP-TAN 4.7UF 6.3WVC302 CK73GB1H102K CHIP C 1000PF KC303 CK73GB1H472K CHIP C 4700PF K

C304,305 CC73GCH1H331J CHIP C 330PF JC306 CK73GB1H102K CHIP C 1000PF KC307 CK73GB1E223K CHIP C 0.022UF KC308 CK73GB1H102K CHIP C 1000PF KC309 CK73GB1E223K CHIP C 0.022UF K


0-10 : K 0-21 : M2 0-22 : M3 0-23 : M4 2-71 : E

TM-271A/271E

12

PARTS LIST

K,M2,M3,M4 : TM-271A

E : TM-271E



nationNewparts


C310 CK73FB1C334K CHIP C 0.33UF KC311,312 CK73GB1C104K CHIP C 0.10UF KC313 C92-0662-05 CHIP-TAN 15UF 6.3WVC314 CK73GB1H103K CHIP C 0.010UF KC315-318 CK73GB1C104K CHIP C 0.10UF K

C319 CK73GB1H102K CHIP C 1000PF KC321 CC73GCH1H680J CHIP C 68PF JC322 CC73GCH1H560J CHIP C 56PF JC323 CC73GCH1H271J CHIP C 270PF JC324 CK73GB1H103K CHIP C 0.010UF K

C326 CK73GB1H103K CHIP C 0.010UF KC350 CK73GB1H471K CHIP C 470PF KC351 CC73GCH1H330J CHIP C 33PF JC353 CK73GB1H103K CHIP C 0.010UF KC354 CC73GCH1H4R5B CHIP C 4.5PF B

C355 CC73GCH1H180J CHIP C 18PF JC356 CC73GCH1H030B CHIP C 3.0PF BC357 CK73GB1H103K CHIP C 0.010UF KC358 CK73GB1H102K CHIP C 1000PF KC359 CC73GCH1H080B CHIP C 8.0PF B

C360-362 CK73GB1H102K CHIP C 1000PF KC363 CK73GB1H103K CHIP C 0.010UF KC364 CK73GB1H102K CHIP C 1000PF KC366 CK73GB1C104K CHIP C 0.10UF KC367 CC73GCH1H151J CHIP C 150PF J

C368 CC73GCH1H270J CHIP C 27PF JC369 CC73GCH1H030B CHIP C 3.0PF BC370 CK73GB1H102K CHIP C 1000PF KC371 CC73GCH1H020B CHIP C 2.0PF BC372 CK73GB1H102K CHIP C 1000PF K

C373 CC73GCH1H060B CHIP C 6.0PF BC374 CC73GCH1H270J CHIP C 27PF JC375-379 CK73GB1H102K CHIP C 1000PF KC380 CC73GCH1H101J CHIP C 100PF JC381 CC73GCH1H4R5B CHIP C 4.5PF B

C382 CC73GCH1H270J CHIP C 27PF JC383 CK73GB1H102K CHIP C 1000PF KC384 CC73GCH1H020B CHIP C 2.0PF BC385 CC73GCH1H080B CHIP C 8.0PF BC386 CC73GCH1H360J CHIP C 36PF J

C387 CK73GB1H102K CHIP C 1000PF KC388 CC73GCH1H070B CHIP C 7.0PF BC389 CK73GB1H102K CHIP C 1000PF KC390 CC73GCH1H090B CHIP C 9.0PF BC391 CC73GCH1H160G CHIP C 16PF G

C400 CK73GB1C104K CHIP C 0.10UF KC401-403 CC73GCH1H101J CHIP C 100PF JC404 C92-0662-05 CHIP-TAN 15UF 6.3WVC406 CK73GB1H102K CHIP C 1000PF KC408 CC73GCH1H220J CHIP C 22PF J

C409 CK73GB1C104K CHIP C 0.10UF KC410 C92-0560-05 CHIP-TAN 10UF 6.3WVC411 CK73GB1C104K CHIP C 0.10UF KC412 C92-0560-05 CHIP-TAN 10UF 6.3WVC413 CK73GB1H103K CHIP C 0.010UF K

C414 CK73GB1C104K CHIP C 0.10UF KC416-418 CK73GB1H102K CHIP C 1000PF KC421,422 CK73GB1H471K CHIP C 470PF KC423 C92-0555-05 CHIP-TAN 0.047UF 35WVC424 C92-0004-05 CHIP-TAN 1.0UF 16WV

C425 C92-0001-05 CHIP C 0.1UF 35WVC426 CC73GCH1H300J CHIP C 30PF JC427 CC73GCH1H080B CHIP C 8.0PF BC428 CK73GB1H471K CHIP C 470PF KC429 CC73GCH1H010B CHIP C 1.0PF B

C430 CC73GCH1H4R5B CHIP C 4.5PF BC431 CC73GCH1H050B CHIP C 5.0PF BC432 CC73GCH1H0R3B CHIP C 0.3PF BC434 CC73GCH1H151J CHIP C 150PF JC435 CC73GCH1H100C CHIP C 10PF C

C436 CC73GCH1HR75B CHIP C 0.75PF BC437 CK73GB1H471K CHIP C 470PF KC438 CC73GCH1H0R5B CHIP C 0.5PF BC439 CC73GCH1H100C CHIP C 10PF CC440 CC73GCH1H110G CHIP C 11PF G

C441 CC73GCH1H0R5B CHIP C 0.5PF BC442 C92-0560-05 CHIP-TAN 10UF 6.3WVC444 CK73GB1H471K CHIP C 470PF KC448,449 CK73GB1H471K CHIP C 470PF KC450 C92-0795-05 CHIP-TAN 22UF 10WV

C451,452 CK73GB1H471K CHIP C 470PF KC453 CK73GB1H221K CHIP C 220PF KC454 CC73GCH1H060B CHIP C 6.0PF BC455 CC73GCH1H030B CHIP C 3.0PF BC456 CC73GCH1H020B CHIP C 2.0PF B

C457 CK73GB1H102K CHIP C 1000PF KC458 CK73GB1H221K CHIP C 220PF KC459 CK73GB1H102K CHIP C 1000PF KC460 CC73GCH1H180J CHIP C 18PF JC461 CK73GB1H102K CHIP C 1000PF K

C462 CC73GCH1H100C CHIP C 10PF CC463,464 CK73GB1H102K CHIP C 1000PF KC465 CC73GCH1H220J CHIP C 22PF JC466 CC73GCH1H101J CHIP C 100PF JC467 CK73GB1H102K CHIP C 1000PF K

C468 CK73GB1H221K CHIP C 220PF KC471 CC73GCH1H100C CHIP C 10PF CC473-476 CK73GB1H102K CHIP C 1000PF KC501,502 CK73GB1H102K CHIP C 1000PF KC503 CC73GCH1H101J CHIP C 100PF J

C504-507 CK73GB1H102K CHIP C 1000PF KC509 CC73GCH1H150J CHIP C 15PF JC510 CC73GCH1H080B CHIP C 8.0PF BC511-514 CK73GB1H102K CHIP C 1000PF KC515 CC73GCH1H270J CHIP C 27PF J

C516 CK73GB1H821K CHIP C 820PF KC517 CC73GCH1H030B CHIP C 3.0PF BC518 CC73GCH1H330J CHIP C 33PF JC519 CC73GCH1H820J CHIP C 82PF JC522 CK73FB1H102K CHIP C 1000PF K

C525 CK73GB1H102K CHIP C 1000PF KC526 CK73GB1H681K CHIP C 680PF KC527 CK73GB1H102K CHIP C 1000PF KC528 CK73GB1H221K CHIP C 220PF KC529 CK73FB1H102K CHIP C 1000PF K

C530 CK73FB1C474K CHIP C 0.47UF KC531 C92-0719-05 CHIP-TAN 47UF 25WVC533 C93-0572-05 CHIP C 100PF JC536 CK73FB1H102K CHIP C 1000PF KC541,542 CM73F2H120J CHIP C 12PF J

TM-271A/271E

13K,M2,M3,M4 : TM-271A

E : TM-271E

PARTS LIST



nationNewparts


C543,544 CM73F2H150J CHIP C 15PF JC545 C93-0603-05 CHIP C 1000PF KC546 CK73FB1C474K CHIP C 0.47UF KC549 CM73F2H221J CHIP C 220PF JC550 CM73F2H680J CHIP C 68PF J

C552 C93-0564-05 CHIP C 22PF JC553 C93-0553-05 CHIP C 3.0PF CC554 C93-0603-05 CHIP C 1000PF KC555 C93-0555-05 CHIP C 5.0PF CC556 C93-0603-05 CHIP C 1000PF K

C557,558 CK73GB1H103K CHIP C 0.010UF KC559 CK73GB1C104K CHIP C 0.10UF KC560 CK73GB1H102K CHIP C 1000PF KC574 CK73GB1H102K CHIP C 1000PF KC576 CK73GB1H221K CHIP C 220PF K

C602 C93-0561-05 CHIP C 12PF JC603 C93-0603-05 CHIP C 1000PF KC605 C93-0562-05 CHIP C 15PF JC606 CC73GCH1H0R5B CHIP C 0.5PF BC607 CC73GCH1H020B CHIP C 2.0PF B

C608 C93-0565-05 CHIP C 27PF JC610 CC73GCH1H0R5B CHIP C 0.5PF BC611 CC73GCH1H020B CHIP C 2.0PF BC613 C93-0565-05 CHIP C 27PF JC614 C93-0553-05 CHIP C 3.0PF C E

C615 C93-0564-05 CHIP C 22PF JC616,617 CK73GB1H102K CHIP C 1000PF KC623 C93-0553-05 CHIP C 3.0PF CTC401 C05-0399-05 CERAMIC TRIMMER (6PF)TC402 C05-0245-05 CERAMIC TRIMMER (10PF)

- E11-0425-05 3.5D PHONE JACK (3P)- E37-1127-05 PROCESSED LEAD WIRECN1 E40-6268-05 FLAT CABLE CONNECTORCN2 E40-5705-05 PIN ASSYCN5 E40-3246-05 PIN ASSY

F1 F53-0246-05 FUSE (4.0A/32V)F501 F53-0108-05 FUSE (1.8A/50V)

CF301 L72-0993-05 CERAMIC FILTERCF302 L72-0999-05 CERAMIC FILTERL101 L92-0443-05 FERRITE CHIPL201 L92-0443-05 FERRITE CHIPL301 L34-4554-05 COIL

L302 L41-3385-08 SMALL FIXED INDUCTORL303,304 L40-3381-86 SMALL FIXED INDUCTOR (0.33UH)L351 L41-8285-08 SMALL FIXED INDUCTORL352 L41-5685-08 SMALL FIXED INDUCTORL354-356 L34-4612-05 AIR-CORE COIL

L357 L34-4610-05 AIR-CORE COILL401 L92-0443-05 FERRITE CHIPL403 L41-1005-08 SMALL FIXED INDUCTORL404 L92-0442-05 FERRITE CHIPL405 L92-0443-05 FERRITE CHIP

L406,407 L40-2785-92 SMALL FIXED INDUCTOR (270NH)L408 L40-3378-67 SMALL FIXED INDUCTOR (33NH)L409,410 L40-2702-86 SMALL FIXED INDUCTOR (27UH)L411,412 L40-2785-92 SMALL FIXED INDUCTOR (270NH)L413 L40-4778-67 SMALL FIXED INDUCTOR (47NH)

L414,415 L40-2702-86 SMALL FIXED INDUCTOR (27UH)L416,417 L92-0443-05 FERRITE CHIP

L418 L41-3375-06 SMALL FIXED INDUCTORL419 L41-1085-06 SMALL FIXED INDUCTORL420 L41-1585-06 SMALL FIXED INDUCTORL421 L41-1085-06 SMALL FIXED INDUCTORL422 L40-5675-92 SMALL FIXED INDUCTOR (56NH)

L423 L92-0443-05 FERRITE CHIPL501,502 L41-6875-08 SMALL FIXED INDUCTORL503,504 L41-2775-06 SMALL FIXED INDUCTORL505 L34-4645-05 AIR-CORE COILL506 L34-4693-05 AIR-CORE COIL

L507 L34-4732-05 AIR-CORE COILL508 L34-4669-05 AIR-CORE COILL509 L34-4667-05 AIR-CORE COILL601 L34-4737-05 AIR-CORE COILL602-604 L34-4736-05 AIR-CORE COIL

L605 L34-4667-05 AIR-CORE COILX86 L78-1409-05 RESONATOR (8.00MHZ)X401 L77-1944-05 TCXO (16.8MHZ)XF351 L71-0620-05 MCF (49.95MHZ)

R1 R92-1252-05 CHIP R 0 OHM J 1/16WR2,3 RK73GB1J101J CHIP R 100 J 1/16WR4-8 RK73GB1J102J CHIP R 1.0K J 1/16WR31 RK73GB1J472J CHIP R 4.7K J 1/16WR32 R92-1215-05 CHIP R 470 J 1/2W

R33 RK73GB1J473J CHIP R 47K J 1/16WR34 RK73GB1J472J CHIP R 4.7K J 1/16WR35 RK73GB1J473J CHIP R 47K J 1/16WR36 RK73GB1J152J CHIP R 1.5K J 1/16WR37 R92-1252-05 CHIP R 0 OHM J 1/16W

R38 RK73GB1J334J CHIP R 330K J 1/16WR39 RK73GB1J474J CHIP R 470K J 1/16WR40 RK73GB1J394J CHIP R 390K J 1/16WR41 RK73GB1J334J CHIP R 330K J 1/16WR61 RK73GB1J471J CHIP R 470 J 1/16W

R62,63 R92-1252-05 CHIP R 0 OHM J 1/16WR70 RK73GB1J473J CHIP R 47K J 1/16WR81 RK73GB1J473J CHIP R 47K J 1/16WR82 R92-1252-05 CHIP R 0 OHM J 1/16WR86 R92-1252-05 CHIP R 0 OHM J 1/16W

R87 RK73GB1J102J CHIP R 1.0K J 1/16WR91,92 RK73GB1J102J CHIP R 1.0K J 1/16WR93 RK73GB1J682J CHIP R 6.8K J 1/16WR94 RK73GB1J103J CHIP R 10K J 1/16WR101,102 RK73GB1J473J CHIP R 47K J 1/16W

R103-106 RK73GB1J102J CHIP R 1.0K J 1/16WR109 RK73GB1J152J CHIP R 1.5K J 1/16WR110 RK73GB1J473J CHIP R 47K J 1/16WR111 RK73GB1J102J CHIP R 1.0K J 1/16WR114 RK73GB1J473J CHIP R 47K J 1/16W

R118 R92-1252-05 CHIP R 0 OHM J 1/16WR119 R92-0670-05 CHIP R 0 OHM K,M3,M4R119 R92-0670-05 CHIP R 0 OHM ER120 R92-1252-05 CHIP R 0 OHM J 1/16W M4R120-123 R92-1252-05 CHIP R 0 OHM J 1/16W K

R121-123 R92-1252-05 CHIP R 0 OHM J 1/16W ER122,123 R92-1252-05 CHIP R 0 OHM J 1/16W M2,M3,M4R124-127 RK73GB1J473J CHIP R 47K J 1/16WR151 RK73GB1J103J CHIP R 10K J 1/16WR152 RK73GB1J472J CHIP R 4.7K J 1/16W

TM-271A/271E

14

PARTS LIST

K,M2,M3,M4 : TM-271A

E : TM-271E



nationNewparts


R161 RK73GB1J122J CHIP R 1.2K J 1/16WR162 RK73GB1J152J CHIP R 1.5K J 1/16WR164-166 RK73GB1J102J CHIP R 1.0K J 1/16WR200 RK73GB1J681J CHIP R 680 J 1/16WR203 RK73GB1J104J CHIP R 100K J 1/16W

R204 RK73GB1J103J CHIP R 10K J 1/16W ER204 RK73GB1J183J CHIP R 18K J 1/16W K,M2,M3R204 RK73GB1J183J CHIP R 18K J 1/16W M4R205 RK73GB1J821J CHIP R 820 J 1/16WR206 RK73GB1J101J CHIP R 100 J 1/16W

R207 RK73GB1J105J CHIP R 1.0M J 1/16W ER207 RK73GB1J754J CHIP R 750K J 1/16W K,M2,M3R207 RK73GB1J754J CHIP R 750K J 1/16W M4R208 RK73GB1J152J CHIP R 1.5K J 1/16WR209 RK73GB1J244J CHIP R 240K J 1/16W

R210 RK73GB1J183J CHIP R 18K J 1/16WR211,212 RK73GB1J823J CHIP R 82K J 1/16WR213 RK73GB1J334J CHIP R 330K J 1/16WR214,215 RK73GB1J683J CHIP R 68K J 1/16WR216 RK73GB1J274J CHIP R 270K J 1/16W

R217 RK73GB1J224J CHIP R 220K J 1/16WR218 RK73GB1J823J CHIP R 82K J 1/16WR219 RK73GB1J124J CHIP R 120K J 1/16WR220,221 RK73GH1J153D CHIP R 15K D 1/16WR222 RK73GB1J103J CHIP R 10K J 1/16W

R224 RK73GB1J561J CHIP R 560 J 1/16WR225 RK73GB1J154J CHIP R 150K J 1/16WR226 RK73GB1J104J CHIP R 100K J 1/16WR227 RK73GB1J223J CHIP R 22K J 1/16WR228 RK73GB1J103J CHIP R 10K J 1/16W

R229 RK73GB1J684J CHIP R 680K J 1/16WR230 RK73GB1J224J CHIP R 220K J 1/16WR231 RK73GB1J124J CHIP R 120K J 1/16WR232 RK73GB1J912J CHIP R 9.1K J 1/16WR233 RK73GB1J682J CHIP R 6.8K J 1/16W

R234 R92-1252-05 CHIP R 0 OHM J 1/16WR236 RK73GB1J103J CHIP R 10K J 1/16WR237 R92-1252-05 CHIP R 0 OHM J 1/16WR246 RK73GB1J154J CHIP R 150K J 1/16WR247 RK73GB1J124J CHIP R 120K J 1/16W

R248 RK73GB1J562J CHIP R 5.6K J 1/16WR249 RK73GB1J153J CHIP R 15K J 1/16WR250 RK73GB1J123J CHIP R 12K J 1/16WR251 RK73GB1J473J CHIP R 47K J 1/16WR252 RK73GB1J474J CHIP R 470K J 1/16W

R253 R92-1252-05 CHIP R 0 OHM J 1/16WR254 RK73GB1J272J CHIP R 2.7K J 1/16WR255,256 RK73GB1J562J CHIP R 5.6K J 1/16WR257 RK73GB1J105J CHIP R 1.0M J 1/16WR258 RK73GB1J272J CHIP R 2.7K J 1/16W

R259 RK73GB1J123J CHIP R 12K J 1/16WR260 RK73GB1J224J CHIP R 220K J 1/16WR261 RK73GB1J124J CHIP R 120K J 1/16WR262 RK73GB1J183J CHIP R 18K J 1/16WR263 RK73GH1J913D CHIP R 91K D 1/16W

R264 RK73GH1J124D CHIP R 120K D 1/16WR265 RK73GH1J562D CHIP R 5.6K D 1/16WR266 RK73GB1J562J CHIP R 5.6K J 1/16WR268 RK73GB1J102J CHIP R 1.0K J 1/16WR269 RK73GB1J393J CHIP R 39K J 1/16W

R271 RK73GB1J332J CHIP R 3.3K J 1/16WR272 RK73GB1J392J CHIP R 3.9K J 1/16WR273 RK73GB1J123J CHIP R 12K J 1/16WR274,275 RK73GB1J153J CHIP R 15K J 1/16WR276 RK73GB1J473J CHIP R 47K J 1/16W

R277 RK73GB1J683J CHIP R 68K J 1/16WR278 RK73GB1J123J CHIP R 12K J 1/16WR279 RK73GB1J472J CHIP R 4.7K J 1/16WR280 RK73GB1J391J CHIP R 390 J 1/16WR281 R92-0670-05 CHIP R 0 OHM

R301,302 RK73GB1J472J CHIP R 4.7K J 1/16WR303 RK73GB1J223J CHIP R 22K J 1/16WR304 RK73GB1J472J CHIP R 4.7K J 1/16WR305 RK73GB1J182J CHIP R 1.8K J 1/16WR306 RK73GB1J274J CHIP R 270K J 1/16W

R308 RK73GB1J334J CHIP R 330K J 1/16WR309 RK73GB1J332J CHIP R 3.3K J 1/16WR310 RK73GB1J102J CHIP R 1.0K J 1/16WR311 RK73GB1J333J CHIP R 33K J 1/16WR312 RK73GB1J473J CHIP R 47K J 1/16W

R313 RK73GB1J104J CHIP R 100K J 1/16WR314 RK73GB1J222J CHIP R 2.2K J 1/16WR315 RK73GB1J183J CHIP R 18K J 1/16WR316 RK73GB1J223J CHIP R 22K J 1/16WR317-320 RK73GB1J103J CHIP R 10K J 1/16W

R321 RK73GB1J223J CHIP R 22K J 1/16WR322 RK73GB1J101J CHIP R 100 J 1/16WR323 RK73GB1J124J CHIP R 120K J 1/16WR324 R92-1252-05 CHIP R 0 OHM J 1/16WR325 RK73GB1J333J CHIP R 33K J 1/16W

R349 RK73GB1J473J CHIP R 47K J 1/16WR350 RK73GB1J273J CHIP R 27K J 1/16WR351 RK73GB1J471J CHIP R 470 J 1/16WR352 RK73GB1J101J CHIP R 100 J 1/16WR353 RK73GB1J104J CHIP R 100K J 1/16W

R354 RK73GB1J331J CHIP R 330 J 1/16WR355 RK73GB1J471J CHIP R 470 J 1/16WR356 RK73GB1J102J CHIP R 1.0K J 1/16WR358 RK73GB1J221J CHIP R 220 J 1/16WR359 RK73GB1J224J CHIP R 220K J 1/16W

R360 RK73GB1J474J CHIP R 470K J 1/16WR361 RK73GB1J181J CHIP R 180 J 1/16WR362 RK73GB1J474J CHIP R 470K J 1/16WR363 RK73GB1J334J CHIP R 330K J 1/16WR364 R92-1252-05 CHIP R 0 OHM J 1/16W

R365 RK73GB1J104J CHIP R 100K J 1/16WR366 RK73GB1J471J CHIP R 470 J 1/16WR367 RK73GB1J101J CHIP R 100 J 1/16WR368 RK73GB1J104J CHIP R 100K J 1/16WR369 R92-1252-05 CHIP R 0 OHM J 1/16W

R370 RK73GB1J560J CHIP R 56 J 1/16WR371 RK73GB1J393J CHIP R 39K J 1/16WR372,373 RK73GB1J473J CHIP R 47K J 1/16WR374 RK73GB1J273J CHIP R 27K J 1/16WR375,376 RK73GB1J104J CHIP R 100K J 1/16W

R379 RK73GB1J104J CHIP R 100K J 1/16WR401-403 RK73GB1J102J CHIP R 1.0K J 1/16WR404 RK73GB1J103J CHIP R 10K J 1/16WR406 RK73GB1J103J CHIP R 10K J 1/16WR407 RK73GB1J152J CHIP R 1.5K J 1/16W

TM-271A/271E

15K,M2,M3,M4 : TM-271A

E : TM-271E

PARTS LIST



nationNewparts


R408 RK73GB1J100J CHIP R 10 J 1/16WR409 RK73GB1J104J CHIP R 100K J 1/16WR410 RK73GB1J822J CHIP R 8.2K J 1/16WR411 RK73GB1J562J CHIP R 5.6K J 1/16WR412,413 RK73GB1J103J CHIP R 10K J 1/16W

R414 RK73GB1J471J CHIP R 470 J 1/16WR415 R92-1252-05 CHIP R 0 OHM J 1/16WR416 RK73GB1J471J CHIP R 470 J 1/16WR417 RK73GB1J224J CHIP R 220K J 1/16WR418 RK73GB1J102J CHIP R 1.0K J 1/16W

R419 RK73GB1J272J CHIP R 2.7K J 1/16WR420 RK73GB1J102J CHIP R 1.0K J 1/16WR421 RK73GB1J152J CHIP R 1.5K J 1/16WR422 RK73GB1J103J CHIP R 10K J 1/16WR423 RK73GB1J221J CHIP R 220 J 1/16W

R424 RK73GB1J101J CHIP R 100 J 1/16WR425,426 RK73GB1J473J CHIP R 47K J 1/16WR427 RK73GB1J104J CHIP R 100K J 1/16WR428 RK73GB1J473J CHIP R 47K J 1/16WR429 RK73GB1J271J CHIP R 270 J 1/16W

R430 RK73GB1J221J CHIP R 220 J 1/16WR431 RK73GB1J104J CHIP R 100K J 1/16WR432 RK73GB1J102J CHIP R 1.0K J 1/16WR433 RK73GB1J472J CHIP R 4.7K J 1/16WR434 R92-1252-05 CHIP R 0 OHM J 1/16W

R435 RK73GB1J101J CHIP R 100 J 1/16WR436 RK73GB1J124J CHIP R 120K J 1/16WR437 RK73GB1J102J CHIP R 1.0K J 1/16WR438 RK73GB1J223J CHIP R 22K J 1/16WR439 RK73GB1J473J CHIP R 47K J 1/16W

R440-442 RK73GB1J101J CHIP R 100 J 1/16WR443 RK73GB1J222J CHIP R 2.2K J 1/16WR444 RK73GB1J102J CHIP R 1.0K J 1/16WR501 RK73GB1J102J CHIP R 1.0K J 1/16WR502 RK73GB1J271J CHIP R 270 J 1/16W

R503 RK73GB1J180J CHIP R 18 J 1/16WR504 RK73GB1J271J CHIP R 270 J 1/16WR505 RK73GB1J222J CHIP R 2.2K J 1/16WR506 RK73GB1J103J CHIP R 10K J 1/16WR507 RK73GB1J100J CHIP R 10 J 1/16W

R509 RK73GB1J220J CHIP R 22 J 1/16WR510 RK73GB1J152J CHIP R 1.5K J 1/16WR511 RK73FB2A470J CHIP R 47 J 1/10WR512 RK73FB2A100J CHIP R 10 J 1/10WR513 RK73FB2A222J CHIP R 2.2K J 1/10W

R514 R92-1217-05 CHIP R 0 OHMR516 R92-0670-05 CHIP R 0 OHMR518 RK73EB2B330J CHIP R 33 J 1/8WR519 RK73GB1J333J CHIP R 33K J 1/16WR520 RK73GB1J183J CHIP R 18K J 1/16W

R521 RK73GB1J101J CHIP R 100 J 1/16WR522 RK73EB2B331J CHIP R 330 J 1/8WR523 RK73GB1J393J CHIP R 39K J 1/16WR524 R92-1215-05 CHIP R 470 J 1/2WR525 RK73GB1J563J CHIP R 56K J 1/16W

R526 R92-1261-05 CHIP R 150 J 1/2WR527 RK73GB1J224J CHIP R 220K J 1/16WR528,529 RK73GB1J471J CHIP R 470 J 1/16WR530 RK73GB1J102J CHIP R 1.0K J 1/16WR531 RK73GB1J473J CHIP R 47K J 1/16W

R532,533 R92-1252-05 CHIP R 0 OHM J 1/16WR601,602 RK73GB1J223J CHIP R 22K J 1/16WR605 RK73GB1J153J CHIP R 15K J 1/16WR606 RK73GB1J221J CHIP R 220 J 1/16WR607 RK73GB1J331J CHIP R 330 J 1/16W

R800 R92-1061-05 JUMPERVR601 R12-6427-05 TRIMMING POT. (47K/12)

D1-6 DA221 DIODED31 ZSH5MA27 SURGE ABSORBERD32 1812L110PR VARISTORD61 02DZ18(X,Y) ZENER DIODED62 MA2S077 DIODE

D201 DAN222 DIODED202 1SS372 DIODED251 MA742 DIODED301 MA742 DIODED302,303 DAN222 DIODE

D351-354 HVC376B VARIABLE CAPACITANCE DIODED401 MA2S111 DIODED402 HZU5ALL DIODED403-406 MA2S304 VARIABLE CAPACITANCE DIODED407 1SV278 VARIABLE CAPACITANCE DIODE

D408 MA2S111 DIODED409 DAN235E DIODED501 1SS355 DIODED502 DA221 DIODED503 02DZ5.1(Y) ZENER DIODE

D602 MA4PH633 DIODED603 XB15A709 DIODED605 XB15A709 DIODED606,607 MA742 DIODED608 1SS355 DIODE

IC31 KIA7808AF ANALOG ICIC32,33 NJM78L05UA BI-POLAR ICIC34 BD4732G MOS ICIC35 BD4740G MOS ICIC66 AT24C64A10SI18 ROM IC

IC66 CAT24WC64JI ROM ICIC101 30622MAA-B85GP MPUIC161 M62363FP MOS ICIC201 NJM2100V MOS ICIC202 BA10358FV MOS IC

IC203 BA10324AFV MOS ICIC204,205 BU4S66 MOS ICIC251 BA10324AFV MOS ICIC252 2B LA4600 BI-POLAR ICIC301 TK14489V BI-POLAR IC

IC401 MB15A02 MOS ICIC402 UPB1509GV BI-POLAR ICIC501 TA75W01FU MOS ICQ31 2SA1641(S,T) TRANSISTORQ32 KRC102S DIGITAL TRANSISTOR

Q33 2SA1745(6,7) TRANSISTORQ34 KRC102S DIGITAL TRANSISTORQ35 KTA1664(Y) TRANSISTORQ36 KRC102S DIGITAL TRANSISTORQ61 KRC404RTK DIGITAL TRANSISTOR

Q86,87 2SK1830 FETQ201 2SC4919 TRANSISTOR

TM-271A/271E

16

PARTS LIST

K,M2,M3,M4 : TM-271A

E : TM-271E

Q251 2SC2412K TRANSISTORQ252,253 2SK3019 FETQ254 DTC363EU DIGITAL TRANSISTORQ255 KRC102S DIGITAL TRANSISTORQ301,302 2SC2412K TRANSISTOR

Q351 2SC5488 TRANSISTORQ352,353 3SK318 FETQ354 2SK1830 FETQ402 2SA1832(GR) TRANSISTORQ403 2SC4738(GR) TRANSISTOR

Q404 2SC4649(N,P) TRANSISTORQ405,406 2SK508NV(K52) FETQ407 2SJ347 FETQ408 KRX102U TRANSISTORQ410 2SC5108(Y) TRANSISTOR

Q411 2SC4649(N,P) TRANSISTORQ440 2SC2412K TRANSISTORQ501,502 2SC3357 TRANSISTORQ503 PD55003TR DRIVE FETQ504 2B RD70HVF1-01 FINAL FET

TH97,98 NCP18WF104J03 THERMISTORTH301 NCP18WF104J03 THERMISTOR



nationNewparts


TM-271A/271E

17

EXPLODED VIEW

Parts with the exploded numbers larger than 700 are not supplied.

3

2

1

BA

1

3031

18

2

3

Dx8

12

13,1429Ax2

A Cx1226 23

13

14

IC252

Q504

25 27

9

8 Cx2

Cx2

6

701S/No. label

702Standard label: K

700Caution label

703Sticker : M3

28

44

43

48

15

42

24

24Bx2

16

103

101

104102

TX-RX unit

Display unit

A M2.6 x 8 : N67-2608-46B M2 x 10 BLK : N80-2010-45C M2.6 x 6 (Br-Tap) : N87-2606-46D M2.6 x 14 (Br-Tap) : N87-2614-46

TM-271A/271E

18

PACKING

Parts with the exploded numbers larger than 700 are not supplied.

3

2

1

DC

17 Fuse (Blade, 15A/32V) (F51-0024-05) : E

5 Instruction manual (B62-1738-10) : K,M2,M3,E (B62-1739-10) : K,M2,E (B62-1745-10) : M3 (B62-1746-10) : M4 (B62-1784-10) : E

10 DC cord (E30-2111-15) : K,M2,M3,M4

46 Screw set (N99-0395-05)

49 Microphone (T91-0624-05) : M2,M4

704 Pamphlet705 Warranty card

36 Protection bag (H25-2341-04)

36 Protection bag (H25-2341-04)

33 Packing fixture (H12-3112-05)

33 Packing fixture (H12-3112-05)

34 Carton board (H13-1190-02)

40 Bracket (J29-0662-03)

39 MIC holder (J19-1584-05)

37 Item carton case (H52-1995-12) : K,M2 (H52-2027-02) : M3 (H52-2028-02) : M4 (H52-2029-12) : E

50 Microphone (T91-0641-05) : K,M3,E

11 DC cord (E30-3452-05) : E

20 Fuse (6x30, 15A) (F51-0017-05) : K,M2,M3,M4

TM-271A/271E

19

Resetting the TansceiverIf your transceiver seems to be malfunctioning, resetting

the microprocessor may solve the problem. The following 2reset modes are available. When performing the reset, youmay lose memory data and stored information. Back up orwrite down important data before performing the reset.

Initial SettingsThe factory defaults for the operating frequencies are as

follows.Transceiver : 144.000MHzThe Memory Channels have no data stored. The Weather

Radio frequency (AL channel) is restored as 162.550MHz (Kmarket model only). The Call Channel and frequency stepsize default values.Note : When in Channel Display Mode or while Key Lock isactivated, you cannot perform VFO reset or Full reset.

Full ResetThis resets all transceiver parameters to the factory de-

fault values. There are two methods available for resettingthe transceiver.

• Full Reset Method 1:1. With the transceiver power OFF, press [F]+[ ] (Power).

• All indicators light momentarily, followed by the full resetconfirmation message.

VFO ResetThis resets the transceiver parameters excluding the

DTMF Memory, the Memory channel contents, and the Callchannel contents. There are two methods available for reset-ting the transceiver.Note : Menu No. 7 (P.VFO) and Menu No. 10 (OFFSET) re-turn to the factory default values.

• VFO Reset Method 1:1. With the transceiver power OFF, press [VFO]+[ ]

(Power).• The VFO reset confirmation message appears.

2. Press [F].• “SURE ?” appears.• Press any key other than [F] to cancel.

3. Press [F] again to reset the transceiver.• “WAIT” appears momentarily.

• Full Reset Method 2:1. Press [F], [MENU] and turn the Tuning control to select

Menu No. 99 (RESET).2. Press [MENU] and turn the Tuning control to select

“FULL”.3. Press [MENU].

• “SURE ?” appears.

• Press any key other than [MENU] to cancel.4. Press [MENU] to reset the transceiver.

• “WAIT” appears momentarily.

2. Press [VFO].• “SURE ?” appears.• Press any key other than [VFO] to cancel.

3. Press [VFO] again to reset the transceiver.• “WAIT” appears momentarily.

• VFO Reset Method 2:1. Press [F], [MENU] and turn the Tuning control to select

Menu No. 99 (RESET).2. Press [MENU] and turn the Tuning control to select

“VFO”.3. Press [MENU].

• “SURE ?” appears.

• Press any key other than [MENU] to cancel.4. Press [MENU] to reset the transceiver.

RESETTING THE TRANSCEIVER

TM-271A/271E

20

ADJUSTMENT

Adjustment ModeIn Adjustment Mode, the transceiver can adjusted using

its panel keys.

Items that can be adjusted in Adjustment Mode *1 1. Frequency Tune 2. Transmit High Power *2 3. Transmit Low Power *2 4. DCS Balance *3 5. Max Deviation *3 6. CTCSS Fine Deviation *3

q Blinks in Adjustment Mode.w Adjustment item displaye Adjustment value display. Can be adjusted while it is

“blinking”.Displayed as a hexadecimal number from 00 to FF.

r Adjustment value stored in memory.When an adjustment value is determined, it is equal to thevalue in “3”.

Panel Key Operation Method in Adjustment Mode

q Power switch/Volume controlw When the knob is pressed once, the adjustment value dis-

play blinks. (Select an adjustment item with “4” or “5”key before performing the operation. It cannot be per-formed while transmitting.)When the knob is rotated while the adjustment display isblinking, the adjustment value changes. (Adjust transmis-sion items while transmitting.)When the knob is pressed again, the adjustment valuestops blinking and lights, and the adjustment value issaved in the memory of the transceiver. (For transmissionitem adjustment, enter receive mode before performingthe operation.)

e Changing between adjustment value display and fre-quency displayThe display changes as follows : Adjustment value display→ Transmit frequency display → Receive frequency dis-play → Adjustment value display.The frequency for adjustment can be confirmed.

r Moves the adjustment item backward. (If it is operatedwhen a frequency is displayed, the adjustment item dis-play returns.)

t Moves the adjustment item forward. (If it is operatedwhen a frequency is displayed, the adjustment item dis-play returns.)

y If it is pressed before determining the adjustment value,the adjustment value of the Adjustment item returns to itsoriginal value.

u Not used in Adjustment Mode.

Note :If Max Power for transmission is low, check the DC cable.If the DC cable connector has poor contact due to rust or

stain, voltage may drop occur frequently and correct trans-mission power may not be supplied.

In this case, polish the DC cable connector. If the problemstill persists, replace the DC cable with a new one.

r

w e

q

TM-271 MENU

q w

e r t y u

TX-RX unitComponent side

7. DCS Fine Deviation *3 8. DTMF Fine Deviation 9. Band Pass Tuning *410. Squelch Tight *511. Squelch Open *512. S-Meter S1 Level13. S-Meter Full Level

Note :*1 : The PLL lock voltage and Max Power Alignment for

transmission cannot be adjusted in Adjustment Mode.*2 : Adjusted in 5 points in the transmission operating fre-

quency range.*3 : Adjusted in 3 points for the Wide Band Width in the

transmission operating frequency range.Adjusted in 1 point for the Narrow Band Width

*4 : Adjusted in 3 points in the reception operating frequencyrange.

*5 : Adjusted in 3 points for the Wide Band Width in the re-ception operating frequency range.Adjusted in 1 point for the Narrow Band Width

How to Enter Adjustment ModeTo perform adjustments with transceiver panel keys, the

transceiver must be set to “Adjustment Mode”.While shorting the following figure terminals on the PCB

with tweezers, etc., turn the power switch ON to enter Ad-justment Mode. (See Fig. 1.)

LCD Display When Adjustment Mode is EnabledExample of Frequency Tune. See “Table 1” for an LCD

display list.

Fig. 1

Fig. 2

Fig. 3

Administrator

Nuovo timbro

TM-271A/271E

21

Adjustment Item Adjustment On the Note Transmit Receive Signalling

Frequency Point Display (MHz) (MHz)

Frequency Tune Center 155.10 155.05

TX High Power Low “H” icon appear 136.10 136.05

Low’ 142.10 142.05

Center 150.10 150.05

High’ 156.10 156.05

High 173.90 173.95

TX Low Power Low “L” icon appear 136.10 136.05

Low’ 142.10 142.05

Center 150.10 150.05

High’ 156.10 156.05

High 173.90 173.95

DCS Balance Low “DCS” icon appear 136.10 136.05 DCS : 023N

Center 155.10 155.05

High 173.90 173.95

DCS Balance (Narrow) Center “DCS” and “N” icon appear 155.10 155.05

Max Deviation Low 136.10 136.05

Center 155.10 155.05

High 173.90 173.95

Max Deviation (Narrow) Center “N” icon appear 155.10 155.05

CTCSS Fine Deviation Low “CT” icon appear 136.10 136.05 CTCSS : 88.5Hz

Center 155.10 155.05

High 173.90 173.95

CTCSS Fine Deviation (Narrow) Center “CT” and “N” icon appear 155.10 155.05

DCS Fine Deviation Low “DCS” icon appear 136.10 136.05 DCS : 023N

Center 155.10 155.05

High 173.90 173.95

DCS Fine Deviation (Narrow) Center “DCS” and “N” icons appear 155.10 155.05

DTMF Fine Deviation Center 155.10 155.05 DTMF : 9

DTMF Fine Deviation (Narrow) Center “N” icon appear 155.10 155.05

Band Pass Tuning Low “BUSY” icon appear 136.10 136.05

Center 155.10 155.05

High 173.90 173.95

Squelch Tight Low 136.10 136.05

Center 146.10 146.05

High 173.90 173.95

Squelch Tight (Narrow) Center “N” icon appear 146.10 146.05

Squelch Open Low 136.10 136.05

Center 146.10 146.05

High 173.90 173.95

Squelch Open (Narrow) Center “N” icon appear 146.10 146.05

S-Meter S1 Level Center 146.10 146.05

S-Meter Full Level Center 146.10 146.05

ADJUSTMENT

Table 1 Adjustment items, display and test frequency list

TM-271A/271E

22

Test Equipment Required for Alignment

Test Equipment Major Specifications

1. Standard Signal Generator Frequency Range 136 to 175MHz(SSG) Modulation Frequency modulation and external modulation

Output –127dBm/0.1µV to greater than –7dBm/100mV2. Power Meter Input Impedance 50Ω

Operation Frequency 136 to 175MHz or moreMeasurement Capability Vicinity of 100W

3. Deviation Meter Frequency Range 136 to 175MHz4. Digital Volt Meter Measuring Range 1 to 20V DC

(DVM) Accuracy High input impedance for minimum circuit loading5. Oscilloscope DC through 30MHz6. High Sensitivity Frequency Range 10Hz to 1000MHz

Frequency Counter Frequency Stability 0.2ppm or less7. Ammeter 20A8. AF Volt Meter Frequency Range 50Hz to 10kHz

(AF VTVM) Voltage Range 1mV to 3V9. Audio Generator (AG) Frequency Range 20Hz to 20kHz or more

Output 0 to 1V10. Distortion Meter Capability 3% or less at 1kHz

Input Level 50mV to 10Vrms11. 8Ω Dummy Load Approx. 8Ω, 10W or more12. Regulated Power Supply 13.8V, approx. 20A (adjustable from 9 to 17V)

Useful if ammeter requipped13. Spectrum Analyzer Center frequency 50KHz to 1000MHz14. Tracking Generator Output Voltage 100mV or more

Tuning cable (E30-3383-05)

Adapter cable (E30-3383-05) is required forinjecting an audio if adjustment mode isused.

MIC connector

(Front view)

Test cable for microphone input (E30-3360-08)

1 : BLC2 : PSB3 : E4 : PTT5 : ME6 : MIC7 : HOOK8 : CM

ADJUSTMENT

Lead wire +

MICShield wire –

3

2

4

5

6

7

8

3

1

2

4

5

6

7

8

1GREEN

RED

BLACK

BLUE

SHIELD

WHITE

GRAY

YELLOW

PTT

E

MIC-E

MIC

HK

1

8

TM-271A/271E

23

ADJUSTMENT

Adjustment Location

Adjustment Points

Notes

• EEPROMThe tuning data (Deviation, Squelch, etc.) for the EEP-

ROM, is stored in memory. When parts are changed, re-adjust the transceiver.

• AF PA IC (IC252)How to mounting the IC252.

• Speaker CableThe speaker cable should be formed before mounting the

shield cover as below.

• FuseTo mount the fuse, the cable terminal direction must be as

follow.

• Except the E type models

Locator

Speakercable

This side up This side up

Cable terminal Cable terminal

Fuse

Pin 1 marker

Part name label face down

IC25

2

TX-RX UNITComponent side

ANT

TC401

TC402L301

BPF

+B E

TX-RX unitFoil side

F501

VR601

Q503Q504

R516

R518 R524

IC25

2

GNDPR9

PR1PKS

SQCPKD

5M

CNVSS

RESETPOWER

RXDTXD

CV

RF

DC

+BE

TEMP1

PC8T

BPF

AFV

8T

TEMP2

TX-RX unitComponent side

• E type models

TM-271A/271E

24

ADJUSTMENT

PCB Section

1. Setting 1) Power supply voltageDC Power supply terminal : 13.8V

2. VCO lock 1) CH : TX high Digital voltmeter CV TC402 5.5V ±0.2Vvoltage*

2) CH : RX high TC401 5.5V ±0.2V

3) CH : TX low Check 0.5V or more

4) CH : RX low

3. IF coil 1) CH : RX center (Wide) SSG AFV L301 3.25~3.35V (DC)2) SSG output : –53dBm (501µV) Digital voltmeter

Mod : 1kHzDev : 3kHz

* Adjustment of TX VCO lock voltage1. Remove R516, F501, R518 and R524 (all on component side).2. Remove PCB from chassis.3. Transmit and check voltage at [CV] point.Warning : Do not transmit if step “1.” is not complete.4. Adjust of voltage can be done by tuning TC402.

Item ConditionTest equipment Terminal Parts Method

Specifications/

Remarks

Measurement Adjustment

Transmitter Section

1. Frequency 1) CH : TX center Frequency counter ANT Encoder Adjust to center frequency Within ±50Hz2) Transmit knob

2. Maximum 1) CH : TX high Power meter VR601 55W ±1Wpower 2) Adjustment HEX value : FFalignment 3) Transmit

3. High 1) CH : TX low Encoder Low : 50W ±1.0Wpower CH : TX low’ knob Low’ : 60W

CH : TX center Center : 60WCH : TX high’ High’ : 50WCH : TX high High : 50W

2) Transmit

4. Low 1) CH : TX low 25W ±1.0Wpower CH : TX low’

CH : TX centerCH : TX high’CH : TX high

2) Transmit

5. DCS 1) CH : TX low (Wide) Modulation analyzer Adjust the waveform as belowbalance CH : TC center (Wide/Narrow) or Linear detector

CH : TX high (Wide) (LPF : 3kHz)2) Transmit Oscilloscope


Specifications/

Remarks


TM-271A/271E

25


Specifications/

Remarks


ADJUSTMENT

If normal power is not obtained, please follow the

step belowOpen the shielding cover (upper), and screw 3 locationsaround ANT pin.1. Switch off the transceiver.

Impedance of Final FET (Q504) and Drive FET (Q503) canbe measured easily using DVM Ω mode.Normal condition – Gate : 20kΩ~50kΩ, Drain : 1MΩ~2MΩThe above impedance values are rough estimations.

2. Switch on the transceiver. Check the voltage at F501 out-put point.The voltage is around 13.8V in receiving condition. Thevoltage will be 12.6V~ in transmitting condition. If found0V at this point then F501 is broken.

3. Remove R516.

4. Connect 50Ω load at the ANT location.Transmit and check current drain at High power mode.If the current drain is less than 1A, then Final FET is bro-ken.If the current drain is less than 5.0A, short the Drive FETgate to ground, and check the current drain.If the current drain is not 0.1A less than the original value,then the Drive FET is broken.

5. Check input power level at Drive FET gate location.Connect the wire to [RF] location.Transmit and check for power to be within the range of0.3W~0.6W.If power found is less than 0.3W, check the circuit beforethe Drive FET.

6. MAX 1) CH : TX low (Wide) Modulation analyzer ANT Encoder ±4.0kHz (Wide) ±100Hz (Wide)deviation CH : TX center (Wide/Narrow) or Linear detector MIC knob ±2.0kHz (Narrow) ±50Hz (Narrow)

CH : TX high (Wide) (LPF : 15kHz) According to the large +, –2) AG : 1kHz/50mV Oscilloscope3) Transmit AG

AF V.M7. MIC 1) CH : TX center (Narrow) Check ±1.2~1.9kHz

sensitivity 2) AG : 1kHz/5.4mV (TM-271A) (Narrow)AG : 1kHz/2.4mV (TM-271E)

3) Transmit

8. CTCSS 1) CH : TX low (Wide) Modulation analyzer Encoder ±0.75kHz (Wide) ±50Hzfine CH : TX center (Wide/Narrow) or Linear detector knob ±0.35kHz (Narrow)deviation CH : TX high (Wide) (LPF : 3kHz)

2) Transmit Oscilloscope

9. DCS fine 1) CH : TX low (Wide) ±0.75kHz (Wide) ±50Hz (Wide)deviation CH : TX center (Wide/Narrow) ±0.35kHz (Narrow) ±40Hz (Narrow)

CH : TX high (Wide)2) Transmit

10. DTMF 1) CH : TX center (Wide/Narrow) ±3.0kHz (Wide) ±200Hz (Wide)fine 2) Transmit ±1.5kHz (Narrow) ±100Hz (Narrow)deviation

Receiver Section

1. Band pass 1) CH : RX low (Wide) SSG ANT Encoder Adjust to maximum SINAD. SINADtuning CH : RX center (Wide/Narrow) Oscilloscope EXT. SP knob : 12dB or higher

CH : RX high (Wide) AF V.M2) SSG output Distortion meter

: –121dBm (0.2µV) (Wide): –119dBm (0.25µV) (Narrow)Mod : 1kHzDev : ±3.0kHz (Wide)Dev : ±1.5kHz (Narrow)


Specifications/

Remarks


TM-271A/271E

26

2. Squelch 1) CH : RX low (Wide) SSG ANT Encoder Adjust to open the squelchtight CH : RX center (Wide/Narrow) Oscilloscope EXT. SP knob

CH : RX high (Wide) AF V.M2) SSG output Distortion meter

: –115dBm (0.4µV) (Wide/Narrow)Mod : 1kHzDev : ±3.0kHz (Wide)Dev : ±1.5kHz (Narrow)

3. Squelch 1) CH : RX low (Wide)open CH : RX center (Wide/Narrow)

CH : RX high (Wide)2) SSG output

: –125dBm (0.126µV) (Wide/Narrow)Mod : 1kHzDev : ±3.0kHz (Wide)Dev : ±1.5kHz (Narrow)

4. RSSI 1) CH : RX center (Wide) Push RSSI value writing is per-writing 2) SSG output : –53dBm (501µV) encoder formed by the “Squelch

Mod : 1kHz knob open” item (center wide).Dev : ±3.0kHz SSG output level is changed

and adjusted after SQadjustment.This adjustment should notturn the encoder.

5. S-meter 1) CH : RX center (Wide)S1 2) SSG output : –118dBm (0.28µV)

Mod : 1kHzDev : ±3.0kHz

6. S-meter 1) CH : RX center (Wide)full scale 2) SSG output : –96dBm (3.54µV)

Mod : 1kHzDev : ±3.0kHz


Specifications/

Remarks


ADJUSTMENT

TM-271A/271E

27


CN No. Pin No. Name Function

CN1 1 ENC A Encoder A

2 CM Microphone Key Check

3 ENC B Encoder B

4 MIC KEY Microphone Key

5 DI Data Out from LCD

6 CE Chip Enable for LCD

7 CL Clock for LCD

8 DO Data transfer to LCD

9 5C 5V DC power supply

10 8C 8V DC supply

11 VOL Volume

12 POWER Power Key

13 RXD RXD

14 BRI Brightness Control

15 PTT PTT

16 GND Ground

17 GND Ground

18 MIC Microphone

CN2 1 GND Ground

2 SQC Squelch Signal

3 PKS Transmission Control

4 PR1 1200bps Receive Data

5 PR9 9600bps Receive Data

6 GND Ground

7 PKD Transmission Modulation


CN5 1 INT SP Internal speaker

2 GND Ground

DISLAY UNIT (X54-3450-10)


CN1 1 ENC A Encoder A

2 CM Microphone Key Check

3 ENC B Encoder B

4 MIC KEY Microphone Key

5 DI Data Out from LCD

6 CE Chip Enable for LCD

7 CL Clock for LCD

8 DO Data transfer to LCD

9 5C 5V DC power supply

10 8C 8V DC supply

11 VOL Volume

12 POWER Power Key

13 RXD RXD

14 BRI Brightness Control

15 PTT PTT

16 GND Ground

17 ME ME

18 MIC Microphone

TERMINAL FUNCTION

JIHGFEDCBA

1

2

3

4

5

6

7

8

9

10

11

12

13

14

D2

CO

M3

CO

M2

CO

M3

CO

M0

SE

G31

SE

G30

SE

G29

SE

G28

SE

G27

SE

G26

SE

G25

SE

G24

SE

G23

SE

G22

SE

G21

SE

G20

SE

G19

SE

G18

SE

G17

SE

G16

SE

G15

SE

G14

SE

G13

SE

G12

SE

G11

SE

G10

SE

G9

SE

G8

SE

G7

SG

D3

J1MIC JACK

D19D20D21

CALL VFO MR

D22 D23

D25D26D27 D28 D29VR1POWER/VOL

C24

C27

C30

C31 C

32

C33

C36

C38

C398C

8C

PTT

PTT

MIC

MIC

CM

CM

MBL

MBL

GND

GND

ME

ME

HOOK

HOOK

C40

R55

C4

L1

D31

IC3

1

161732

33

4849 64

R21

R22

R23

R25R46

R51

R52

R53

CP

1

C15

C16

C19

LCD

28

TM-271A/271E PC BOARD

DISPLAY UNIT (X54-3450-10) Component side view (J72-0905-09)

DISPLAY UNIT (X54-3450-10) Foil side view (J72-0905-09)

J K L M N O P Q R S

1

2

3

4

5

6

7

8

9

10

11

12

13

14

SE

G9

SE

G8

SE

G7

SE

G6

SE

G5

SE

G4

SE

G3

SE

G2

SE

G1

SE

G0

D3

D4

REV

FUNCTION

D23 D24

D29 D30 S1ENCODER

J72-0905-09

J72-0905-09

R47

R48

C22

C25

C27

C32

C34

C35

Q10

Q121

2 3

5

L1

R10

R26

Q6

Q9

BCE

R8

R41

R42R

43

R44

R45

R49

R50

R54

CN

1

1

18

ENCACM

ENCBMIC KEY

DICECLDO5C8C

VOLPOWER

RXDBRIPTT

GNDME

MIC

29

Component side

Foil side

Layer 1Layer 2

Component side

Foil side

Layer 1Layer 2

DISPLAY UNIT (X54-3450-10) Foil side view (J72-0905-09)


PC BOARD TM-271A/271E

Ref. No. Address

D2 6F

D3 6J

D4 5O

D19 4G

D20 4P

D21 4E

D22 4I

D23 4J

D24 4K

D25 3G

D26 3F

D27 3E

D28 3I

D29 3J

D30 3K

Ref. No. Address

IC3 11H

Q6 10M

Q9 11M

Q10 10N

Q12 10N

D31 9C

J K L M N O P Q R SIHGFEDCBA

1

2

3

4

5

6

7

8

9

10

11

12

13

14

1

2

3

4

5

6

7

8

9

10

11

12

13

14

D2

CO

M3

CO

M2

CO

M3

CO

M0

SE

G31

SE

G30

SE

G29

SE

G28

SE

G27

SE

G26

SE

G25

SE

G24

SE

G23

SE

G22

SE

G21

SE

G20

SE

G19

SE

G18

SE

G17

SE

G16

SE

G15

SE

G14

SE

G13

SE

G12

SE

G11

SE

G10

SE

G9

SE

G8

SE

G7

SE

G6

SE

G5

SE

G4

SE

G3

SE

G2

SE

G1

SE

G0

D3

D4J1MIC JACK

D19D20D21

CALL VFO MR REV

FUNCTION

D22 D23 D24

D25D26D27 D28 D29 D30 S1ENCODER

J72-0905-09

J72-0905-09

VR1POWER/VOL

R47

R48

C22

C24

C25

C27

C30

C31 C

32

C33

C34

C35

C36

C38

C398C

8C

PTT

PTT

MIC

MIC

CM

CM

MBL

MBL

GND

GND

ME

ME

HOOK

HOOK

C40

R55

Q10

Q121

2 3

5

C4

L1

D31

IC3

1

161732

33

4849 64

R10

R21

R22

R23

R25

R26

Q6

Q9

BCE

R8

R41

R42R

43

R44

R45

R46

R49

R50

R51

R52

R53

R54

CN

1

CP

1

C15

C16

C19

LCD

1

18

ENCACM

ENCBMIC KEY

DICECLDO5C8C

VOLPOWER

RXDBRIPTT

GNDME

MIC

28 29


Component side

Foil side

Layer 1Layer 2

Component side

Foil side

Layer 1Layer 2


DISPLAY UNIT (X54-3450-10) Foil side view (J72-0905-09) DISPLAY UNIT (X54-3450-10) Foil side view (J72-0905-09)



Ref. No. Address

D2 6F

D3 6J

D4 5O

D19 4G

D20 4P

D21 4E

D22 4I

D23 4J

D24 4K

D25 3G

D26 3F

D27 3E

D28 3I

D29 3J

D30 3K

Ref. No. Address

IC3 11H

Q6 10M

Q9 11M

Q10 10N

Q12 10N

D31 9C

Administrator

Nuovo timbro

JIHGFEDCBA

1

2

3

4

5

6

7

8

9

10

11

12

13

14

C20

R40

1

R40

2

R40

3

R408

C28

R409

C29

J1EXT. SP

R41

0R

411

R412

R41

3

R41

4

R418

R41

9

IC33

O G BCEI R42

0

R421

R422C44

C45

C49

R23

6

R237

C50

C20

1

C51

C52

R24

6

R248

C40

0

C401

R24

9

C402

C403

C40

8

R250

C41

0

C411

C41

2

C41

3

C414

C416

C41

7R268

R26

9

C422

C42

3

C424

C425

C82

C83

C23

5

R271

R272

R273

R274

F501

Q35

R275

R27

6

Q36

R277

R27

8R

279

R28

0

C24

9

C25

0

D3

D4

D5

D6

C26

7 C26

8

D40

1

D402

C270 +

+

+

+

++

+

C271

C272

C27

3

Q503

S

S

G D

C274

C27

5

C276

C27

7C

278

F1

C28

1

C47

5

C47

6

IC204

IC205

1

34

5

1

34

5

L503

L504

L505

IC401

D251

R101

R10

5R

106

R11

8

R11

9

E SP

R12

0R

121

R12

2

R12

5

R51

6

R518

R519

R520

R521

R52

3

R52

4

R52

5

R52

7

R5

R52

9

R

R151R152

C51

4C

516

C517

C518

C519

C522

C52

5

C527

C528

C529

R35

R1

R36

R2

R37

R3

C530

C53

1

C533

C536

C15

1

C15

2

C55

9

Q40

2

Q403

C56

0

L201

D50

3

L404

R81

R82

IC252

1

10

IC55

8

CN1

CN

2

CN

5

Q252Q253

DS

GD

S

G

Q254

Q25

5

C10

1 17182

CM MIC K

EYCE DO 8C PO

WER

BRI

GN

DM

IC

ENCA

ENCB DI CL 5C

VOL

RXD

PTT

ME

C13

R200

C15

C16

C17

C18C19

GND

PR9

PR1 PKS

SQC

PKD

5M

CNVSS

RESET

1

7POWER

RXD

TXD

CV

RF

DC

+BE

8T

+

+

+

PKD

GND

PR9

PR1

PKS

SQC

GND

+

1

1011

20

30

TM-271A/271E PC BOARDTX-RX UNIT (X57-685X-XX) Component side view (J72-0906-09) 0-10 : TM-271A (K) 0-21 : TM-271A (M2) 0-22 : TM-271A (M3)

0-23 : TM-271A (M4) 2-71 : TM-271E (E)

J K L M N O P Q R S

1

2

3

4

5

6

7

8

9

10

11

12

13

14

R210

R404

R21

1R

212

R40

6

R21

3

R407

R21

4

R408

R21

5

R409

R21

6

R21

7

R218R219

IC16

1

1 121324

R605

R60

6

R60

7

R22

0

R221

R22

2

R22

4R

225

R226

J72-0906-09

R227 R228

R22

9

R23

0

R23

1

R232

R233

R23

4

C202 C20

3C204

C205 C20

6

C207

C208

C20

9

R24

7

C40

0

C21

0

C40

4

C21

1

C212

C406

C21

3

C21

4

C40

8

C21

5

C409

C21

6

C217

C218

C60

2

C60

3

C41

0

X401

C605

C411

C41

2

C41

3

C608

C220 C22

2

C225

C22

6

C22

7 C22

8

C613

C614C615

C23

0

C231

C232

C233

C62

3

VR

601

C97

C98

C442

D20

1

D202

Q302

+

+

+

+

Q504 DG

L302

D60

2

D603

L303

L304

C47

3

D608

IC2011

4 5

8

1

4 5

8IC202

IC20

3

L506

L507

L508

L509

Q351

Q354G

SD

R302

R30

3

R304

R30

5

R30

6

R311

R31

2 R313

R314

R315

R316

R31

7

R318

R31

9

R32

0

R32

1

178 14

R322

R323

R32

4

R521

R52

4

R52

7

R528

R52

9

R530

R531

R53

2

C303

R53

3

C304

TH30

1

C305

R34

9

C310

C311

C312

C31

3 C31

4

R350

C315R351C316R

352

R35

3

C317

C318

R354

C31

9

R35

5

R161R162

R164

C128

R165

R166

C32

1

C32

2

C32

3

C32

4

C52

5

R379

C536

C54

1C

542

C35

0

C351

C545

C546

C35

3

C354

C16

1

C35

5

C54

9

C162

C356

C163C164

Q201

C165

C550

C55

2C

553

C554 C555

D30

2

D303

C55

9

C56

0

L401L403

L404

C574

C576

C389

IC5011

45

8

TH97

TH98

R203

R204

R205

R206

R20

7 R208

R20

9

TEMP1

PC

8T

BPF

AFV

8T

TEMP2

1

10

+

+

+

+

+

++

+

+

+

31

Component side

Foil side

Layer 1Layer 2Layer 3Layer 4

TX-RX UNIT (X57-685X-XX) Component side view (J72-0906-09)0-10 : TM-271A (K) 0-21 : TM-271A (M2) 0-22 : TM-271A (M3)

0-23 : TM-271A (M4) 2-71 : TM-271E (E)


Ref. No. Address

IC33 12B

IC161 1N

IC201 10P

IC202 11P

IC203 12P

IC204 10I

IC205 11I

IC252 10B

IC401 12J

IC501 8J

Q35 13C

Q36 12C

Q201 11O

Q252 12F

Q253 12F

Q254 11D

Q255 10D

Q302 13K

Q351 12N

Q354 9O

Q402 12H

Q403 13H

Q503 6G

Q504 5K

D3 12E

D4 12E

D5 11E

D6 11E

D201 11O

D202 10O

D251 9E

D302 12O

D303 12O

D401 12J

D402 13I

D503 8J

D602 7P

D603 7Q

D608 8L


1

2

3

4

5

6

7

8

9

10

11

12

13

14

1

2

3

4

5

6

7

8

9

10

11

12

13

14

C20

R40

1

R40

2

R40

3

R210

R404

R21

1R

212

R40

6

R21

3

R407

R21

4

R408

C28

R21

5

R409

C29

J1EXT. SP

R21

6

R21

7

R218R219

R41

0R

411

IC16

1

1 121324

R605

R412

R60

6

R41

3

R60

7

R41

4

R22

0

R221

R22

2

R418

R22

4R

225

R41

9

R226

J72-0906-09

R227

IC33

O G BCEI

R228

R22

9

R42

0

R421

R422C44

R23

0

C45

R23

1

R232

R233

R23

4

C49

R23

6

R237

C50

C20

1

C51

C52

C202 C20

3C204

C205 C20

6

C207

C208

C20

9

R24

6 R24

7

R248

C40

0

C401

R24

9

C402

C403

C21

0

C40

4

C21

1

C212

C406

C21

3

C21

4

C40

8

R250

C21

5

C409

C21

6

C217

C218

C60

2

C60

3

C41

0

X401

C605

C411

C41

2

C41

3

C608

C414

C220

C416

C22

2

C41

7

C225

C22

6

C22

7 C22

8

C613

R268

C614

R26

9

C615

C422

C42

3

C424

C23

0

C425

C231

C232

C82

C233

C83

C23

5

R271

R272

R273

R274

F501

Q35

R275

R27

6

Q36

R277

C62

3

R27

8

VR

601

R27

9

R28

0

C97

C98

C24

9

C442

C25

0

D3

D4

D5

D6

D20

1

D202

Q302

C26

7 C26

8

D40

1

D402

C270 +

+

+

+

+

+

+

+

+

C271

C272

C27

3

Q503

S

S

G D

C274

Q504 DG

C27

5

C276

C27

7C

278

F1

L302

D60

2

D603

L303

L304

C47

3

D608

C28

1

IC2011

4 5

8

1

4 5

8

C47

5

IC202

C47

6

IC20

3

IC204

IC205

1

34

5

1

34

5

L503

L504

L505

L506

L507

L508

IC401

L509

D251

Q351

Q354G

SD

R101

R10

5R

106

R302

R30

3

R304

R30

5

R30

6

R11

8

R11

9

E SP

R311

R31

2 R313

R12

0

R314

R12

1

R315

R316

R12

2 R31

7

R318

R12

5

R31

9

R32

0

R32

1

178 14

R322

R51

6

R323

R32

4

R518

R519

R520

R521

R52

3

R52

4

R52

5

R52

7

R528

R52

9

R530

R531

R53

2

C303

R53

3

C304

TH30

1C305

R151R152

R34

9

C310

C311

C312C

313 C

314

R350

C315R351C316R

352

R35

3

C317

C318

R354

C31

9

R35

5

R161R162

R164

C128

R165

R166

C51

4

C32

1

C32

2

C51

6

C32

3

C517

C32

4

C518

C519

C522

C52

5

C527

C528

C529

R35

R1

R36

R2

R37

R3

C530

R379

C53

1

C533

C536

C15

1

C15

2

C54

1C

542

C35

0

C351

C545

C546

C35

3

C354

C16

1

C35

5

C54

9

C162

C356

C163C164

Q201

C165

C550

C55

2C

553

C554 C555

D30

2

D303

C55

9

Q40

2

Q403

C56

0

L201

D50

3

L401L403

L404

C574

C576

R81

R82

IC252

1

10

C389

IC5011

45

8

CN1

CN

2

CN

5

TH97

TH98

Q252Q253

DS

GD

S

G

Q254

Q25

5

C10

1 17182

CM MIC K

EYCE DO 8C PO

WER

BRI

GN

DM

IC

ENCA

ENCB DI CL 5C

VOL

RXD

PTT

ME

C13

R200

C15

C16

C17

R203

C18

R204

C19

R205

R206

R20

7 R208

R20

9

GND

PR9

PR1 PKS

SQC

PKD

5M

CNVSS

RESET

1

7POWER

RXD

TXD

CV

RF

DC

+BE

TEMP1

PC

8T

BPF

AFV

8T

TEMP2

+

+

+

PKD

GND

PR9

PR1

PKS

SQC

GND

+

1

1011

20

+

+

+

+

+

++

+

+

+

30 31


Component side

Foil side


TX-RX UNIT (X57-685X-XX) Component side view (J72-0906-09) 0-10 : TM-271A (K) 0-21 : TM-271A (M2) 0-22 : TM-271A (M3)

0-23 : TM-271A (M4) 2-71 : TM-271E (E)

TX-RX UNIT (X57-685X-XX) Component side view (J72-0906-09)0-10 : TM-271A (K) 0-21 : TM-271A (M2) 0-22 : TM-271A (M3)

0-23 : TM-271A (M4) 2-71 : TM-271E (E)


Ref. No. Address

IC33 12B

IC161 1N

IC201 10P

IC202 11P

IC203 12P

IC204 10I

IC205 11I

IC252 10B

IC401 12J

IC501 8J

Q35 13C

Q36 12C

Q201 11O

Q252 12F

Q253 12F

Q254 11D

Q255 10D

Q302 13K

Q351 12N

Q354 9O

Q402 12H

Q403 13H

Q503 6G

Q504 5K

D3 12E

D4 12E

D5 11E

D6 11E

D201 11O

D202 10O

D251 9E

D302 12O

D303 12O

D401 12J

D402 13I

D503 8J

D602 7P

D603 7Q

D608 8L

JIHGFEDCBA

1

2

3

4

5

6

7

8

9

10

11

12

13

14

CF3

01

CF302

R601

R60

2

R41

5

R41

6

R417

R42

3

R42

4R

425

R42

6

R427

R42

9

R800ANT

R43

0

R43

1

R43

2R

433

R434

R435

R43

6R437

R438R439

R440R44

1

R442

R443

R444

R25

1R252R253

R25

4

R255R256

R25

7

R258

R25

9

C606C607

C418

R260

TC40

1

R261

R262

R263

R26

4

C610

R26

5

C61

1R

266

C42

1

C616

C61

7

C4

C42

7

C42

8

C42

9

C430

C431

C43

2 C

C437

C438

C43

9

C440

C441

C44

4

C251

C252C25

3

C44

8

C254

C255 C44

9

C256

C257

C258 C25

9 C450

C451

C452

C45

3

C260

C454

C261

C45

5

C26

2

C45

6

C26

3

C45

7

C264

C458

C265

C459

Q301

C26

6

C46

0

C461C462

C46

3

C464

C465

Q50

1

B C E

C466

C46

7

D40

8

C46

8

D40

9

L301

C471

D60

5

D606

D607

C474

L501

IC402

Q352

Q353S

DG2

G1

R30

1

L351

BPF

L352

R30

8

L354

L355

R309

L356

L357R

501

IC251

1

78

14

R50

2

R503

R50

4

R310

R505

R50

6

R50

7

R509

R51

0

R325

R526

C30

1

C302

C306

C307

C308

C309

C501

C50

2

C503

C504

C50

5

C50

6

C50

7

C509

R35

6

R358

R359

C51

1

R360

R36

1

XF351

C326

R362

R36

3

R36

4R

365

R36

6

R367

R36

8

R36

9

R370

R371

R372

R373

R374

R37

5

R37

6

C35

7

C35

8

C359

C36

0

C36

1

D30

1

C36

2

C556

C36

3

C55

7

C54

4C

543

C364

C558

C366

C367C368

Q404

C36

9

Q40

5

GS D

Q406

GS

D

Q40

7GS

D

Q408123

5

D501D50

C370

C37

1

C37

2

C373

Q410

C37

4

Q411

C37

5C37

6C377

C378

C37

9

L407

L408

C38

0

C38

1

IC301

1

1011

20

L409

C38

2

C38

3

C38

4

C385

L601

C386

L602

C38

7

L603

C38

8

L410

L604

L605

L4

L414

L415

L416

L417

L418

C39

0

L419

C39

1

L420

L421

L422

L423

Q44

0

Q25

1

D35

1

D352

D35

3

D354

+

S

DG2

G1

1

45

8 +

32

TM-271A/271E PC BOARDTX-RX UNIT (X57-685X-XX) Foil side view (J72-0906-09)0-10 : TM-271A (K) 0-21 : TM-271A (M2) 0-22 : TM-271A (M3)

0-23 : TM-271A (M4) 2-71 : TM-271E (E)

J K L M N O P Q R S

1

2

3

4

5

6

7

8

9

10

11

12

13

14

C30

C33

C34+

C35

C36

C37

C38

C39

IC31

IC32

IC34

IC35

1 345

1 345

C40

C41

C42 C43

R42

6

R427

R428

R42

9 C53

C54

C55

C56

C61

C66

IC66

1

4 5

8

TC40

1

TC40

2

C426

C42

7

Q31

E B

C

Q32

C87

Q33

Q34

C88 C89

C43

4

C90

C43

5

C436

C437

C438

C43

9

R28

1

C440

1

C44

4

D1

D2

2

Q61

L101

D40

3

D404

Q50

1

D40

5

Q502

B

C

E

D406

D407

C279

C28

0

C28

2

C28

3

L501

L502 Q86 GDS G

DS

Q87

R102R103R104

R10

9R

110

R11

1R

114

R50

7

R509

R123

R124

R126

R12

7

D31

R51

1

D32

R512

R513 R51

4

R522

C10

1

C102

C10

4

D61

D62

C50

7

C509C510

C51

1

C51

2 C51

3

C515

C526

R31

R32

R33

R34

R4

R38

R5R

39

R6

R7

R8

R40 R

41

R61

R62

R63

Q406

GS

D

D502

R70

0

IC101

L405

L406

L407

L408

L411

L412

R86

L413

R87

L414

5

L416 R91

R92R93

R94

X86

C14

J72-0906-09

12526

5051 75

76

100

+B E

+

+

+

+

+O

G

I

I

O

G

33


Ref. No. AddressIC31 12QIC32 13OIC34 13MIC35 13LIC66 11L

IC101 11NIC251 12BIC301 12EIC402 13GQ31 5PQ32 4PQ33 12PQ34 12PQ61 4PQ86 10NQ87 10N

Q251 11BQ301 13EQ352 10FQ353 10BQ404 12IQ405 12IQ406 13JQ407 12IQ408 11HQ410 12IQ411 12GQ440 12HQ501 10IQ502 10K

D1 12OD2 11O

D31 4ND32 5QD61 4PD62 4P

D301 13FD351 10DD352 10CD353 9BD354 8BD403 11KD404 11JD405 13KD406 12KD407 12KD408 12HD409 10GD501 10ID502 10JD605 7BD606 5BD607 4B

TX-RX UNIT (X57-685X-XX) Foil side view (J72-0906-09)0-10 : TM-271A (K) 0-21 : TM-271A (M2) 0-22 : TM-271A (M3)

0-23 : TM-271A (M4) 2-71 : TM-271E (E)

Component side

Foil side



1

2

3

4

5

6

7

8

9

10

11

12

13

14

1

2

3

4

5

6

7

8

9

10

11

12

13

14

CF3

01

CF302

R601

R60

2

C30

C33

C34+

R41

5

C35

C36

R41

6

C37

R417

C38

C39

IC31

IC32IC

34

IC35

1 345

1 345

C40

C41

C42

R42

3

C43

R42

4R

425

R42

6

R427

R428

R42

9

R800ANT

R43

0

R43

1

R43

2R

433

C53R434 C54

C55

R435

C56

R43

6R437

R438R439

R440R44

1

C61

R442

R443

R444

R25

1

C66R252R253

R25

4

R255R256

R25

7

R258

R25

9

C606

IC66

1

4 5

8

C607

C418

R260

TC40

1

R261

R262

TC40

2

R263

R26

4

C610

R26

5

C61

1R

266

C42

1

C616

C61

7

C426

C42

7

C42

8

C42

9

Q31

E B

C

Q32

C87

Q33

Q34

C88 C89

C430

C431

C43

2

C43

4

C90

C43

5

C436

C437

C438

C43

9

R28

1

C440

C441

C44

4

C251

C252C25

3

C44

8

C254

C255 C44

9

C256

C257

C258 C25

9

D1

D2

C450

C451

C452

C45

3

C260

C454

C261

C45

5

C26

2

C45

6

C26

3

C45

7

C264

C458

C265

Q61

C459

Q301

C26

6

C46

0

C461

L101

C462

D40

3

C46

3

C464

D404

C465

Q50

1

B C E

D40

5

C466

Q502

B

C

E

D406

C46

7

D407

D40

8

C46

8

D40

9

L301

C279

C471

D60

5

D606

D607

C28

0

C474

C28

2

C28

3

L501

L502 Q86 GDS G

DS

Q87

IC402

Q352

Q353S

DG2

G1

R102R103R104

R10

9

R30

1 R11

0R

111

L351

BPF

L352

R30

8

R11

4

L354

L355

R309

L356

L357R

501

IC251

1

78

14

R50

2

R503

R50

4

R310

R505

R50

6

R50

7

R509

R123

R124

R126

R12

7

R51

0

D31

R51

1

D32

R512

R513 R51

4

R325

R522

C10

1

C102

R526

C10

4

C30

1

C302

C306

C307

C308

C309

C501

C50

2

C503

C504

C50

5

D61

C50

6

D62

C50

7

C509

R35

6

C510

R358

R359

C51

1

C51

2 C51

3

C515

R360

R36

1

XF351

C326

R362

R36

3

R36

4R

365

R36

6

R367

R36

8

R36

9

C526

R370

R31

R371

R32

R372

R373

R33

R374

R34

R37

5

R37

6

R4

R38

R5R

39

R6

R7

R8

R40 R

41

C35

7

C35

8

C359

C36

0

C36

1

D30

1

C36

2

C556

C36

3

C55

7

C54

4C

543

C364

C558

R61

C366

R62

C367

R63

C368

Q404

C36

9

Q40

5

GS D

Q406

GS

D

Q40

7GS

D

Q408123

5

D501D502

C370

C37

1

C37

2

C373

R70

Q410

C37

4

Q411

IC101

C37

5C37

6C377

C378

C37

9

L405

L406

L407

L408

C38

0

C38

1

IC301

1

1011

20

L409

C38

2

C38

3

C38

4

C385

L601

C386

L602

C38

7

L603

C38

8

L410

L604

L411

L605

L412

R86

L413

R87

L414

L415

L416

L417

L418

C39

0

L419

C39

1

R91

R92R93

R94

L420

L421

L422

L423

Q44

0

Q25

1

X86

D35

1

D352

D35

3

D354

C14

J72-0906-09

+

S

DG2

G1

1

45

8 +

12526

5051 75

76

100

+B E

+

+

+

+

+O

G

I

I

O

G

32 33

TM-271A/271E PC BOARD PC BOARD TM-271A/271E

Ref. No. AddressIC31 12QIC32 13OIC34 13MIC35 13LIC66 11LIC101 11NIC251 12BIC301 12EIC402 13GQ31 5PQ32 4PQ33 12PQ34 12PQ61 4PQ86 10NQ87 10NQ251 11BQ301 13EQ352 10FQ353 10BQ404 12IQ405 12IQ406 13JQ407 12IQ408 11HQ410 12IQ411 12GQ440 12HQ501 10IQ502 10K

D1 12OD2 11O

D31 4ND32 5QD61 4PD62 4PD301 13FD351 10DD352 10CD353 9BD354 8BD403 11KD404 11JD405 13KD406 12KD407 12KD408 12HD409 10GD501 10ID502 10JD605 7BD606 5BD607 4B


0-23 : TM-271A (M4) 2-71 : TM-271E (E)


0-23 : TM-271A (M4) 2-71 : TM-271E (E)

Component side

Foil side


TM-271A/271E SCHEMATIC DIAGRAM

34

7

6

5

4

3

2

1

A B C D E

-t-t

C42

2

470p

C40

8

22p

R42

7

100k

C21

8

10u6

.3

C44

4

470p

R42

2

10k

C43

80.

5p

C43

747

0p

C21

2

1200

p

R16

1

1.2k

C45

3

220p

C16

4

10u6

.3

C88 4p

C23

2

1000

p

R20

0

680

R227

22k

C22

0

4.7u

6.3

C16

3

1000

p

C441

0.5p

TC

401

10p

R41

6

470

R22

9

680k

C21

5

0.1u

C432

0.3p

R166 1k

8C

C213

3300p

5C

C23

1

1000

p

C23

3

4.7u

6.3

L404

R16

2

1.5k

R419

2.7k

R21

8

82k

C87

3p

R208

1.5k

C45

022

u10

R211

82k

R42647k

R23

3

6.8k

C22

7

0.01

u

R23

0

220k

R421

1.5k

5C

R207*

D404

MA2S304

D40

3

MA

2S30

4

C42

8

470p

5M

C42

1

470p

C41

010

u6.3

C44

847

0p

R20

3

100k

R412

10k

D40

5

MA

2S30

4

2SC4919Q201

C205

0.1u

2SC4738(GR)Q403

2SA1832(GR)Q402

D406MA2S304

R212

82k

L416

C40

3

100p

L201

R205

820

R409

100kD

401

MA

2S11

1

C40

9

0.1u

C43

6

0.75

pR165 1k

R42547k

R43

5

100

R4150

C16

1

1000

p

L405

C41

4

0.1u

D201DAN222

5C

C45

2

470p

5M

R860

C23

0

0.1u

R43

6

120k

R164 1k

C40

2

100p

C20

8

0.01

u

C20

7*

IC201NJM2100V

1 2 3 45678

V+

R430

220

TC

402

10p

C45

5

3p

R87 1k

R43

4

0

R410

8.2k

C41

6

1000

p

R217

220k

C41

3

0.01

u

D2021SS372

C22

8

10u6

.3

R41

3

10k

C411

0.1u

C20

4

2.2u

10

R22

0

15k

C203*

C41

810

00p

C42

5

0.1u

35

R22

1

15k

8C

R40

7

1.5k

C89 4p

R23

29.

1k

C42

3

0.04

7u35

C21

7

10u6

.3

C430 4.5p

R41

7

220k

L417

R401 1k

C40

6

1000

p

R23

1

120k

R43

3

4.7k

8C

C21

4

150p

R41

1

5.6k

R402 1k

R21

3

330k

R214

68k

R414

470

R403 1k

C45

1

470p

C42

4

1u16

IC401MB15A02

11121314151617181920

R21

9

180k

C210

0.1u

C454

6p

C41

7

1000

p

R228

10k

L403

10u

R22

6

100k

D40

8

MA

2S11

1

D402

HZU5ALL

C40

1

100p

C206*

R215

68k

C20

1

0.1u

C90

3p

C22

6

4700

p

C43

15p

C20

2

1000

p

C21

1

820p

C40

4

15u6

.3

C16

2

4.7u

6.3

R21

6

270k

R432

1k

R40

810

R20

4*

C44

9

470p

R418

1k

8C

R43

1

100k

R206

100

C22

5

1u16

R404

10k

R209

240k

R42

0

1k

R22

5

150k

C412

10u6.3

R210

18k

C44

2

10u6

.3

R428

47k

CN2

1

2

3

4

5

6

7

D5DA221

C16

470p

D6DA221

C19

470p

C17

470p

C18

470p

C20

470p

IC205BU4S66

1I/O

2O/I

3VSS

4

5R237

0

R23

6

10k

C235

1u

PR9

PR1

PKS

SQC

5C

R23

4

0

IC204BU4S66

1I/O

2O/I

3VSS

4CONT

5VDD

C222

0.1u

R224

560

PKD

PKD

5C

R93

6.8k

R94 10

kT

H98

100k

C97

1000

p

TH

97

100k

C98

1000

pC216

39p

IC161M62363FP

1 2 3 4 5 6 7 8 9

10 11 12131415161718192021222324

R22

2

10k

IC203BA10324AFV

VCC VEE

C209 68p

C16

5

1u

X401

L77-1944-05

R40

6

10k

C47

5

1000

p

C47

6

1000

p

C47

3

1000

p

C40

0

0.1u

L406

270n

L407

270n

C426

30p

L409

27u

L408

33n

C42

7

8p

L410 27

u

R42

3

220C

429

1p

R429

270

L411

270n

C434150p

L41347n

C43

5

10p

L412

270n L4

14

27u

C43910p

R42

4

100

L415

27u

C44

011

p

L401

L418 33

n

D40

7

1SV

278

IC202BA10358FV

12345 6 7 8

VC

C

SPLATTER FILTER

OR GATE

W/N

I(E

VO

L1)

5C

RX VCO

TX VCO

CV

VOTAGEDROPPED

CHARGE PUMP

MIC AMP/IDC

TCXO

IDC

AGC

BUFFER AMP

CK(CPU54)

DT(CPU53)

DT

(CP

U53

)

HPF


W/N

O(E

VO

L2)

DI

PLLE(CPU3)

FR

OO

(EV

OL2

3)

UL(CPU21)

CK

(CP

U54

)

PLL

E(C

PU

3)

8CL

8CL

LIPPLEFILTER

DIGITALPOTENTIOMETER

RX VCO

MO

DI(

EV

OL9

)

TX VCO

KDC

Q402,403

D405,406

BEATSHIFT

BUFFER AMP

8C

D403,404

CV

MIC AMP/SPLATTERFILTER

MOD

MODULATION

8C

1/2Vcc

AGC/MIC MUTE

T/R SW

PLL IC

D407

T/R SW

16.8MHz

BEATSHIFT

MO

D

LIPPLEFILTER

RF AMP

MOD

SUM AMP

PLL SYNTHESIZER

SQC

PKS

PR1

PR9

PKD

SINGLEANALOG SW

SINGLEANALOG SW

MOD BUFFA1/2Vcc

DCAMP

Q201

SURGE ABSORPTION

D5,6

RIPPLEFILTER

1 2 3 4 5 6 7 8 9 10C

LK

NC

3

DAT

ALEFC

NC

4

FO

UTP

NC

5RO

SC

IN

NC

1

OS

CO

UT

VP

VC

C

DO

GN

D

LD NC

2

FIN

2SC4649(N,P)Q404

2SK508NV(K52)Q406

2SJ347Q407

2SK508NV(K52)Q405

2SC5108(Y)Q410

Q408KRX102U

2SC2412KQ440

CONT

VDD

2SK1830Q87

X86

8.00MHzL78-1409-05

2SK1830Q86

8

9

10

11

12

13

141

2

3

4

5

6

7

2VO

LI

2VO

LO

BLO BLI

1VO

LI

1VO

LODO

VD

Fref

RE

SE

T

GN

D

FR

QI

FR

QO

PC

/TV

O

PC

/TV

I

VD

D

LD CLK

DAT

MO

DI

MO

DO

W/N

O

W/N

I

BR

II

BR

IO

QT/DQT(CPU1)

1/2Vcc

EVLLD(CPU8)

UL(CPU21)

PLLE(CPU3)

M1MT(CPU76)

XOUT(CPU11)

XIN(CPU13)

TX DTMF

BSHIFT

P9MT(CPU75)

MICMT(CPU77)

TX/RX (CPU20)

W/NO(EVOL2)

W/NI(EVOL1)

MIC

VOLO(EVOL11)

VOLI(EVOL12)

DT(CPU53)

CK(CPU54)

BRI

PLL

E(C

PU

3)

MO

DO

(EV

OL1

0)

PC

/TV

UL(

CP

U21

)

PC

/TV

O(E

VO

L3)

EV

LLD

(CP

U8)

P9M

T(C

PU

75)

MIC

MT

(CP

U77

)

MO

D

TX

/RX

(C

PU

20)

T:4.16V

T:0.82V

R:1.8mV(BS OFF) 5V(BS ON)

R:4.92VT:3.9mV

R:7.04VR:4.90V

R:0.74VT:0.62V

R:3.37V

R:6.11VR:6.17V

R:7.9V

R:0.71V

R:2.48V

R:7.7V

4.97V

R:4.98V

R:6.96V

T:6.8V

R:0.97V

R:4.96V

R:2.8mV

R:0.1mV

R:0.76V

R:4.05V

R:7.98V

R:7.01V

X57-685 1/3

SCHEMATIC DIAGRAM TM-271A/271E

35

JIHGF

X57-685 2/3

35

C46

110

00p

C37

7

1000

p

R118 0C

511

1000

p

R322

100

R301

4.7k

2SC3357Q502

R371

39k

L50427n

C51

4

1000

p

R10

3

1k

L421

100n

C301

4.7u6.3

C37

6

1000

p

C502

1000p

R353

100k

R32

4

0

C45

8

220p

C268

1u

C36

1

1000

p

R10

1

47k

R37

6

100k

C319

1000p

R50

922

C312 0.1u

R51

4

0

L304

330n

C46

7

1000

p

C51527p

D409 DAN235E

8T

C46

5

22p

C37

2

1000

p

C36

3

0.01

u

R268

1k

R35

9

220k

R31

9

10k

C456

2p

C50

710

00p

C459

1000p

C32

4

0.01

u

C36

6

0.1u

C38

7

1000

p

R36

0

470k

R35

1

470

8R

69

R106 1k

C31

4

0.01

u

34

L302

330n

CNVSS

D303DAN222

R36

6

470

R43

8

22k

C311 0.1u

C36

4

1000

p

R37

0

56

C50

4

1000

p

R510

1.5k

L501

68n

C384

2p

5M

C46

3

1000

p

C15

1

1800

p

5M

R315 18k

C51

982

p

C38

3

1000

p

R369

0

R444

1k

C101

1000p

R1091.5k

IC66AT24C64A10SI18or CAT24WC64JI

1A0

2A1

3A2

4GND

5

6

7

8

R44

2

100

IC402UPB1509GV

1

2

3

4 5

6

7

8R516

0

C10

4

0.1u

R35

6

1k

5M

R31

710

k

5M

R105 1k

L303

330n

8R

R50

4

270

C371

2p

R111

1k

R10

2

47k

R51

1

47

C50

5

1000

p

R43

7

1k

R32

5

33k

C51

310

00p

R503

18

C35

8

1000

p

L101

C32

2

56p

C460

18p

C51

210

00p

5C

L301L34-4554-05

8C

8C

R81

47k

5C

R123

0

C37

8

1000

p

D502DA221

C30

2

1000

p

R70

47k

71

R10

4

1k

L420

150n

R32

1

22k

C351

33p

R50

2

270

R82 0

R314 2.2k

C516820p

L352

560n

C32

6

0.01

u

C509

15p

D50

11S

S35

5

C37

9

1000

p

R151

10k

C51

833

p

R51

3

2.2k

C466

100p

C31

3

15u6

.3

C66 1000p

L50327n

70

C32

3

270p

R51

2

10

8R

C51

0

8p

R364

0

R25

0

12k

R50

5

2.2k

8RC

267

0.47

u

C46

4

1000

p

5M

5M

C36

0

1000

p

C35

7

0.01

u

R152

4.7k

D302DAN222

C46

2

10p

R37

3

47k

L422

56n

C31

6

0.1u

C25

0

0.1u

C37

5

1000

p

C83

0.1u

C46

8

220p

C315

0.1u

L502

68n

C380

100p

L419

100n

R11047k

R44

3

2.2k

R44

1

100

8R

C45

7

1000

p

C50

1

1000

p

R35

2

100

R36

2

470k

C50

610

00p

R31

6

22k

C82

1000

p

C36

2

1000

p

R354

330

R24

9

15k

C503

100p

C51

73p

C37

0

1000

p

R31

810

k

R50

1

1k

C359

8p

R43

9

47k

R36

5

100k

C15

2

3900

p

R36

8

100k

R50

6

10k

L351

820n

R323

120k

R50

7

10

2SC4649(N,P)Q411

2SC3357Q501

C102

0.1u

R30

2

4.7k

R32

0

10k

R269

39k

C31

7

0.1u

R37

5

100k

C35

3

0.01

u

R44

0

100

17

5M

C31

8

0.1u

TON

E

DT

MF

PLL

E

NC

NC

GN

D

CN

VS

S

EV

LLD

BS

HIF

T

RE

SE

T

XO

UT

VS

S

XIN

VC

C

GN

D

NC

PO

WE

R

INT

NC

TX

/RX

UL

NC

NC

EE

PS

DT

EE

PC

K 26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51525354555657585960616263646566676869707172737475

76

P1MT77MICMT

78NC

798RC

808TC

81NC

82SBC

83NC

84NC

85NC

86CM

87MICKEY2

88MICKEY

89VOL

90TEMP2

91TEMP1

92RSSI

93SQIN

94AVSS

95DTMF IN

96VREF

97AVCC

98NC

NC

NC

74 73

R124

47k

R921k

R91

1k

87

R12

7

47k

88

89

2SC2412KQ302

C321

68p

C47

4

1000

p

SQC

PKS

PR

1

5M

68

R12

5

47k

R11

9*R

120

*R12

20

R12

1*

R24

6

150k

R24

7

120k

R24

8

5.6K

C24

9

4.7u

6.3

2SC5488Q351

R355

470

C35

5

18p

C35

4

4.5p

C35

6

3p

R35

8

220

R36

1

180

C367

150p

R36

3

330k

C36

9

3p L354

50n

L355 50n

D35

1

HV

C37

6B

C36

8

27p

R36

7

100 C

373

6p

C37

4

27p

D35

2

HV

C37

6B

3SK318Q352

G1

D

S

G2

3SK318Q353

G1

D

S

G2

R37

2

47k

R37

4

27k

L356

50n

C38

2

27p

C38

6

36p

L357

35.5

n

D35

3

HV

C37

6B

D35

4

HV

C37

6B

C471

10p

C128

1000p

R12

647

k

L423

R11

4

47k

5M

C38

5

8p

C38

1

4.5p

2SK3019Q252

2SK3019Q253

8TC(CPU80)

FM DEMODULATION

TP

TEMPERATURECOMPENSATION


5M

WIDE(CPU65)

TXDRXD

RF SWITCH

NARROW

NARROW(CPU64)

D351,352

IF SWITCH

RF BPF TUNING

D353,354

IF AMP

50,4

MH

z

D501

8R 8R

IF SWITCH

W/NI(EVOL1)

EEPROM

RF AMP

CPU

AFV

AF MUTE

AF MUTE

AFI(EVOL12)

DIVIDER(HETERO)

AFM(CPU50)

WIDE

RF AMP/DRIVE STAGE

BUFFER AMP

RF BPF TUNING

MIXERRF AMP

8RC(CPU76)

8TC(CPU80)

AMPSW(CPU52)

SPM(CPU51)

BRI

8RC(CPU76)

VOLO(EVOL11)

W/NO(EVOL2)

MIC

PC/TV

RF AMP/DRIVE STAGE

CM

MICKEY

VOL

TV

TX/RX (CPU20)

QT/DQT(CPU1)

EVLLD(CPU8)

TX DTMF

UL(CPU21)

PLLE(CPU3)

XOUT(CPU11)

XIN(CPU13)

POWER

M1MT(CPU76)

P9MT(CPU75)

MICMT(CPU77)

CK(CPU54)

DT(CPU53)

W/NO(EVOL2)

PC/TV

W/NI(EVOL1)

MIC

VOLI(EVOL12)

VOLO(EVOL11)

BRI

SQIN(CPU93)

RSSI(CPU92)

SBC(CPU82)

1/2Vcc

DTMF IN(CPU95)

BSHIFT

IC10130622MAA-B85GP

NC

SQC

PKS

CLKFLS

BSYFLS

TXD

RXD

PTT

NC

NC

NC

EMPFLS

NC

NC

NC

NC

CEFLS

NC

NC

NC

NC

NC

AFM

EEPWPNC

SP

M

AM

PS

WDT

CK

NC

DS

T1

DS

T2

DS

T3

DS

T4

VC

C

NC

VS

S

AD

J

NA

RR

OW

WID

E

NC

NCCL

CE

DO

(to

LCD

)

DI(

from

LC

D)

NC

EN

CB

EN

CA

P9M

T

99

100

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

SPM(CPU51)

AMPSW(CPU52)

W/NI(EVOL1)

VOLI(EVOL12)

SW1

SW2

OUT

VCC2VCC1

IN

IN

GND

SDA

SCL

WP

VCC

SQIN(CPU93)

SBC(CPU82)

RESET(CPU10)

INT(CPU18)

1/2Vcc

DTMF IN(CPU95)

RSSI(CPU92)

IC301TK14489V

SCAN

SCAN

SQLIN

FLAMPO

RFIN

GND

Hy_C

FLAMPI

RSSI

AFO

VCC

IF_IN

DEC1

DEC2

PH_S

QUCO

OSC(B)

OSC(E)

NC

MIX_O

1

2

3

4

5

6

7

8

9

10 11

12

13

14

15

16

17

18

19

20

XF351

49.95MHzL71-0620-05

CF301L72-0993-05

CF302L72-0999-05

R:3.22V

R:4.65V

R:4.27V

R:0.66V

T:0.48V

N:5VW:0V

T:1.23V

R:2.46V

R:4.98V

R:7.99V

R:7.42V

R:4.84VT:5.73V

4.98V

R:0.75V

R:0.56V

R:4.7mV(SQ OFF) 4.97V(SQ ON)

R:1.44V

R:6.34V

R:6.64V

N:0VW:5V

T:1.26V

T:6.8V

T:0.88V

T:7.82VR:1.23V

R:5V

R:2.7V

R:7.84V

T:5.61V

R:2.88VR:5.86VR:3.16V


TM-271A/271E SCHEMATIC DIAGRAM

36

K L M N O

X57-685 3/3

-t

C33

1000

p

C55

9

0.1u

R30

5

1.8k

L603

5T

C43

22u1

0L6

01 6T

C52

7

1000

p

R30

4

4.7k

B

5M

R259

12k

C61

7

1000

p

IC33NJM78L05UA

2

COM

3IN

1OUT

2

COM

3IN

1OUT

R25

2

470k

2SA1641(S,T)Q31

R26

1

120k

C26

3

0.03

3u

C55

0.1u

R36

1.5k

5C

R258

2.7k

C29

470p

R52

7

220k

R35

0

27k

BS

B

C603

1000p

C25

7

0.03

9u

R41

330k

C41

22u1

0

R60

6

220

C30

7

0.02

2u

C45

22u1

0

C53

0

0.47

u

C28

110

00p

R52

615

0

R37

0

TH

301

100k

8R

5C

C31

0

0.33

u

R278

12k

C52

1000

p

8T

L604

5T

R34

4.7k

R52

1

100

C44

22u1

0

R27

1

3.3k

8T

C34

330u

25

L509

9.5T

R39

470k

Q254DTC363EU

R25

7

1M

R25

5

5.6k

C27

80.

1u

KTA1664(Y)Q35

68

C54

0.1u

L508

2.5T

D608

1SS355

D602MA4PH633

R306

270k

C60

6

0.5p

R265

5.6k

R30

8

330k

C25

4

0.22

u

SB

73

R275

15k

R33

47k

R27

6

47k

C36

1000

p

C306

1000p

R27

3

12k

C258

0.01u

C53

6

1000

p

C35

0

470p

C274

0.22u

C54

6

0.47

u

R800

F501

R520

18k

R605

15k

C39

0.1u

D61

02DZ18(X,Y)

R531

47k

C27

2

1000

p

R251

47k

70

Q36KRC102S

R51

9

33k

C28

220p

B

C27

6

1000

p

R28

1

0

C49

0.01

u

34

C55

0

68p

C526

680p

R26

6

5.6k

C26

6

1u

C27

7

1000

p

2SA1745(6,7)Q33

C55

7

0.01

u

R61

470

C61

5

22p

8C

R34

9

47k

C25

1

4.7u

6.3

R53

0

1k

D301MA742

Q32KRC102S

C53

1

47u2

5

C38

1000

p

D251MA742

74

C54

5

1000

p

R53

3

0

D606MA742

L605

9.5T

C52

2

1000

p

C61

0

0.5p

C30

8

1000

p

C60

8

27p

71

R277

68k

C27

1

1200

p

CN5

C61

6

1000

p

C42

0.01

u

69

35

C52

9

1000

p

C27

5

1u

C61

1000

p

D321812L110PR

L602

5T

R25

4

2.7k

89

C57

4

1000

p

C554

1000p

R31

2

47k

C53

1000

p

C56

0

1000

p

C61

3

27p

C57

6

220p

C26

5

0.1u

R256

5.6k

C51

10u6

.3

D50

3

02D

Z5.

1(Y

)

C28

047

u16

R60

2

22k

R313

100k

17

5C

C38

9

1000

p

L506

9.5T

C27

94.

7u16

R60

1

22k

R279

4.7k

87

R31

0

1k

R26

3

91k

BS

B

L507

1T

R379

100k

C253

0.22u

C26

2

1000

p

R532

0

D607MA742

R51

8

33

R35

47k

Q34KRC102S

C40

0.1u

R27

4

15k

R62 0

C273

1u

C61

1

2p

C56

1000

p

R52

5

56k

R529

470

R253

0

8T

C55

8

0.01

u

R31

4.7k

C54

9

220p

R40

390k

Q255KRC102S

R528

470

C35

1000

p

C52

5

1000

p

D31

ZS

H5M

A27

R27

2

3.9k

R52

4

470

Q61KRC404RTK

R264120k

R38

330k

8T

2

COM

1IN

3OUT

C55

6

1000

p

C25

2

39p

8R

C50

0.01

u

C25

5

8200

p

8C

C309

0.022u

C28

3

1000

p

C37 1000p

R30

3

22k

IC501TA75W01FU

1

2

3

4VEE

5

6

7

8VCC

D60

5

XB

15A

709

C26

1

0.01

uR

309

3.3k

R26

2

18k

C256

0.018u

R31

1

33k

C60

7

2p

C30

3

4700

p

R26

0

220k

C30

1000

p

C52

822

0p

R32

470

C264

0.033u

R28

0

390

C55

5

5p

R4 1k

R2 100

R3 100

CN1

R7 1k

R5 1k

R8 1k

R6 1k

C13

470p

C14

470p

C10

1000

p

C15

470p

R1 0

D3

DA

221

D2

DA

221

D4

DA

221

D1

DA

221

8C

5C

5M

88

R522330

R523

39k

C533

100p

L505

15n

C54

212

p

C54

1

12p

C55

2

22p

C55

3

3p

C61

4*

C623

3p

C60

2

12p

C60

5

15p

D60

3

XB

15A

709

VR

601

47k

R607

330

PR

9

C30

5

330p

C30

4

330p

1

2

3

4VCC

5

6

7

VEE

2SC2412KQ251

FB

R63

0

D62

MA2S077

1NC

2SUB

3GND

4VOUT

5VCC

IC34BD4732G

1NC

2SUB

3GND

4VOUT

5VCC

J1

F1

FB

C28

2

330u

25

C388

7p

C39

0

9p

C391

16p

2SK1830Q354

PD55003TRQ503

C54

4

15p

C54

3

15p

KEC

8TC

CURRENTPROTECTION

BUFFERAMP

MIC

AUDIOFILTER

SQ

IN(C

PU

93)

B

OVER VOLTAGE

DETECTION

EVOLTAGEREGULATOR(8C)

REVERSECONNECTIONPROTECTION

APC CONTROLLER

FINAL AMP

D603,605


1/2Vcc

D31

TV

5M

LIMITTER

PC/TV SW

KEC

PC

8T

KEC

Q35,36

APC VOLTAGEDETECT

VOLTAGEDETECTOR(RESET)

D606,607

ANT SW

ANT SW

D1-4

VOLTAGEREGULATOR(5M)

8TC(CPU80)

8RC(CPU76)

D32

DRIVE AMP

RX

1,1A

5C

DETECTIONVOLTAGEDETECTOR(INT)

DC SW (SB)

8C

W/N

O(E

VO

L2)

NOISE AMP/SQL AMP

VOLTAGEPROTECTION

KEC

Q33,34

KEC

8C

SB

OVER VOLTAGEDETECTION

VOLTAGEREGULATOR(5C)

SURGE ABSORPTION

KEC

AF MUTE

AF MUTE

8R

POWER

IC252LA4600

12345678910

PTT

BRI

RXD

POWER

VOL

8C

5C

DO

CL

CE

DI

MICKEY

ENCB

CM

ENCA

MIC

DC SW (SB)

DC SW (8R)

DC SW (8T)


BRI

AUDIO AMP

RD70HVF1-01Q504

AMPSW(CPU52)

MIC

8TC(CPU80)

SPM(CPU51)

8RC(CPU76)

BRI

PC/TV

VOLO(EVOL11)

W/NO(EVOL2)

2SC2412KQ301

8

9

10

11

12

13

14

IC251BA10324AFV

DTMF IN(CPU95)

INT(CPU18)

RESET(CPU10)

SBC(CPU82)

1/2Vcc

SQIN(CPU93)

INT(CPU18)

RESET(CPU10)

SBC(CPU82)

IC35BD4740G

IC31KIA7808AF

IC32NJM78L05UA

AMPSW(CPU52)

VOLO(EVOL11)

SPM(CPU51)

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

C25

9

0.01

u

C26

0

0.01

u

C27

0

4.7u

6.3

T:1.6V

R:4.02V

R:13.8VT:13.45V

T:1.45V

R:4.98V

R:2.7V

R:7.9V

R:13.8V

R:4.98V

T:7.55V

R:13.66VT:12.94V

R:4.31V

R:1.15V

R:3.37V

R:4.98V

R:1.74V

R:3.3V

R:7.9V

T:0.76V

T:7.84V

R:7.95V

T:2.5V

T:1.46V

T:7.85V

R:0.87V

T:4.97V

T:7.84V


SCHEMATIC DIAGRAM TM-271A/271E

37

7

6

5

4

3

2

1

TSRQP

X54-345 1/1

C25

1000

p

C15

100p

R43

820

C33

1000

p

C19

680p

C4

100p

D26

B30-2205-05

Q12UMG3N

D21

B30-2205-05

J1

1

8

R41

56

CP1

R90-0724-05

C35

4700

p

D24

B30-2205-05

R54

56

C39

0.1u

D2 C22

1000

p

Q6

KRC102S

C40

0.1u

L1

R44

18k

CN1

R21

10k

D30

B30-2205-05

R46

100

D31

1SS355

C27

1000

p

R51 0

D3

B30-2205-05

R23

10k

R25

56k

D4

C38

470p

D22

B30-2205-05

C36 1u

D23

B30-2205-05R10

1.2k

R48

47k

R26

3.9k

D19

B30-2205-05

R49

56

C32

1000

p

C24

0.1u

C31

1000

p

R42

2.7k

Q10KRA225S

R47

47k

D25

B30-2205-05

R45

33k

C16

100p

BL

NC

NC

NC

SE

G0

SE

G1

SE

G2

SE

G3

SE

G4

SE

G5

SE

G6

SE

G7

SE

G8

SE

G9

SE

G10

SE

G11

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33343536373839404142434445464748

49NC

50KI1

51KI2

52KI3

53NC

54NC

55NC

56VDD

57VDD1

58VDD2

59VSS

60OSC

61DO (to cpu)

62CE

63CL

64DI (from cpu)

C34

4700

p

D29

B30-2205-05

D20

B30-2205-05

R53 0

D27

B30-2205-05

R22

10k

VR1R31-0646-05

R50

56

C30

0.1u

R52 0

D28

B30-2205-05

R8

1k

S1W02-3665-05

SE

G9

SE

G15

SE

G7

SE

G10

SE

G23

SE

G3

SE

G21

SE

G11

CO

M2

SE

G13

CO

M1

RESISTOR

CO

M3

SE

G24

KEY ILLUMINATION

SE

G1

LCD (B38-0885-05)

SE

G17

SE

G27

SE

G29

SE

G4

SE

G26

SE

G31

SE

G5

SE

G14

SE

G18

SE

G19

VARIABLE

SE

G8

SE

G12

SE

G2

SE

G20

LCD ILLUMINATION


SE

G22

MR

SE

G0

SE

G16

CO

M0

SE

G6

SE

G28

SE

G25

SE

G30

ENCODER

LCD CONTROLLER

KEY BACKLIT SWITCH

DIMMERFUNCTIONSWITCH

LCD BACKLIT

D2-4

LCD BACKLIT SWITCH

DC SWITCH

KEY BACKLIT

D19-30

MHz & MENUADJUASTMENT

ON/OFF & VOLUMEADJUASTMENT

144-148MHz

144-146MHz

TM-271A

TM-271E E

K

M3

M2

M4

X57-685X-XX

0-23

0-10

0-21

0-22

2-71

Func

CALLVFO

REV

CMHOOK

MICMEPTTGND8CMBL(Key A)

ENCODER A

CM

ENCODER B

MIC KEY

DI(from LCD)

CE

CL

DO

5C

8C

VOL

POWER

RXD

BRI

PTT

GND

ME

MIC

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

2SB1132(Q,R)Q9

IC3

LC75854Wor

PT6554LQ

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16S

EG

28

SE

G29

SE

G30

SE

G31NC

NC

NC

CO

M0

CO

M1

CO

M2

CO

M3

KS

1

KS

2

NC

NC

NC

SEG12SEG13

SEG14

SEG15

SEG16

SEG17

SEG18

SEG19

SEG20

SEG20

SEG22

SEG23

SEG24

SEG25

SEG26SEG27

C203

0.027u

0.027u

0.047u

0.027u

0.027u

1000p

1000p

680p

1000p

C206

1000p 0.022u

0.022u

0.022u

0.022u

C207

0.039u

NO

C614

3p

NO

NO

NO

0

0

R119

0

NO

0 0

0

NO

R120

NO

NO

0

R121

0

NO

NO

NO

10k

18k

R204

18k

18k

18k

1M

750k

750k

750k

750k

R207

R55

0

7.30V

7.90V 7.10V

4.96V

4.94V

4.96V

5.02V

7.90V

4.80V(BRIGHTNESS MAX)0V(BRIGHTNESS OFF)

Note : The components marked with a dot (•) are parts of layer 1.

Administrator

Nuovo timbro

-t

-t-t

C42

2

470p

C33

1000

p

C55

9

0.1u

35

C40

8

22p

R42

7

100k

R30

5

1.8k

C46

110

00p

C37

7

1000

p

L603

5T

C21

8

10u6

.3

C43

22u1

0

R118 0

C44

4

470p

L601 6T

C52

7

1000

p

R42

2

10k

C43

80.

5p

R30

4

4.7k

C51

1

1000

p

C43

747

0p

C21

2

1200

p

R16

1

1.2k

C45

3

220p

R322

100

B

5M

C16

4

10u6

.3

R259

12k

R301

4.7k

C61

7

1000

p

IC33NJM78L05UA

2

COM

3IN

1OUT

2

COM

3IN

1OUT

2SC3357Q502

R371

39k

C88 4p

R25

2

470k

L50427n

2SA1641(S,T)Q31

R26

1

120k

C26

3

0.03

3u

C55

0.1u

R36

1.5k

C23

2

1000

p

5C

C51

4

1000

p

R20

0

680

R10

3

1k

R258

2.7k

L421

100n

R227

22k

C29

470p

C301

4.7u6.3

C37

6

1000

p

R52

7

220k

C502

1000p

R35

0

27k

C22

0

4.7u

6.3

R353

100k

BS

B

C16

3

1000

p

C603

1000p

C441

0.5p

R32

4

0

C45

8

220p

C25

7

0.03

9u

R41

330k

TC

401

10p

R41

6

470

C41

22u1

0

C268

1uR22

9

680k

C36

1

1000

p

C21

5

0.1u

R60

6

220

C432

0.3p

R10

1

47k

R37

6

100k

C30

7

0.02

2u

R166 1k

C45

22u1

0

C53

0

0.47

u

8C

C319

1000p

C28

110

00p

R50

922

C213

3300p

C312 0.1u

R52

615

0

R37

0

TH

301

100k

R51

4

0

L304

330n

8R

5C

5C

C23

1

1000

p

C23

3

4.7u

6.3

C31

0

0.33

u

C46

7

1000

p

L404

R16

2

1.5k

R278

12k

C52

1000

p

C51527p

8T

D409 DAN235E

L604

5T

8T

R419

2.7k

R21

8

82k

C46

5

22p

R34

4.7k

R52

1

100

C87

3p

C44

22u1

0

C37

2

1000

p

C36

3

0.01

u

R268

1k

R35

9

220k

R31

9

10k

C456

2p

C50

710

00p

R208

1.5k

C459

1000p

R27

1

3.3k

8T

C34

330u

25

C32

4

0.01

u

C45

022

u10

L509

9.5T

R211

82k

R39

470k

Q254DTC363EU

C36

6

0.1u

R25

7

1M

C38

7

1000

p

R42647k

R23

3

6.8k

R36

0

470k

R25

5

5.6k

C27

80.

1u

KTA1664(Y)Q35

C22

7

0.01

u

R23

0

220k

R421

1.5k

R35

1

470

68

5C

R207*

D404

MA2S304

C54

0.1u

D40

3

MA

2S30

4

L508

2.5TC42

8

470p

8R

69

5M

D608

1SS355

C42

1

470p

R106 1k

C31

4

0.01

u

34

D602MA4PH633

R306

270k

L302

330n

CNVSS

C41

010

u6.3

C60

6

0.5p

D303DAN222

C44

847

0p

R36

6

470

R43

8

22k

R20

3

100k

R265

5.6k

R30

8

330k

C311 0.1u

C25

4

0.22

u

C36

4

1000

p

SB

73

R275

15k

R33

47k

R27

6

47k

R37

0

56

C36

1000

p

R412

10k

D40

5

MA

2S30

4

2SC4919Q201

C306

1000p

R27

3

12k

C205

0.1u

C258

0.01u

C50

4

1000

p

2SC4738(GR)Q403

C53

6

1000

p

R510

1.5k

2SA1832(GR)Q402

L501

68n

C384

2p

5M

C35

0

470p

C274

0.22u

C46

3

1000

p

C15

1

1800

p

D406MA2S304

5M

R212

82k

L416

R315 18k

C54

6

0.47

u

R800

F501

C40

3

100p

R520

18k

R605

15k

C51

982

p

C38

3

1000

p

R369

0

R444

1k

C101

1000p

R1091.5k

C39

0.1u

IC66AT24C64A10SI18or CAT24WC64JI

1A0

2A1

3A2

4GND

5

6

7

8

D61

02DZ18(X,Y)

L201

R531

47k

R44

2

100

C27

2

1000

p

R251

47k

R205

820

R409

100k

70

IC402UPB1509GV

1

2

3

4 5

6

7

8

D40

1

MA

2S11

1

R5160

Q36KRC102S

R51

9

33k

C28

220p

C40

9

0.1u

B

C10

4

0.1u

C27

6

1000

p

R28

1

0

R35

6

1k

5M

R31

710

k

C49

0.01

u

34

C55

0

68p

C526

680p

5M

R105 1k

C43

6

0.75

p

L303

330n

R165 1k

R26

6

5.6k

C26

6

1u

R42547k

8R

R43

5

100

C27

7

1000

p

2SA1745(6,7)Q33

C55

7

0.01

u

R61

470

R4150

C16

1

1000

p

C61

5

22p

L405

8C

R34

9

47k

R50

4

270

C371

2pC

414

0.1u

R111

1k

C25

1

4.7u

6.3

R53

0

1k

R10

2

47k

D301MA742

Q32KRC102S

R51

1

47

C53

1

47u2

5

C38

1000

p

D251MA742

74

C50

5

1000

p

R43

7

1k

C54

5

1000

p

R32

5

33k

R53

3

0

D201DAN222

5C

C45

2

470p

D606MA742

5M

L605

9.5T

C51

310

00p

R503

18

C35

8

1000

p

L101

C52

2

1000

p

R860

C61

0

0.5p

C23

0

0.1u

C30

8

1000

p

R43

6

120k

C32

2

56p

C60

8

27p

71

R277

68k

R164 1k

C460

18p

C27

1

1200

p

CN5

C51

210

00p

C40

2

100p

5C

C61

6

1000

p

C20

8

0.01

u

L301L34-4554-05

C20

7*

IC201NJM2100V

1 2 3 45678

V+

C42

0.01

u

69

R430

220

35

C52

9

1000

p

C27

5

1u

TC

402

10p

C45

5

3p

C61

1000

p

D321812L110PR

8C

L602

5T

8C

R87 1k

R25

4

2.7k

89

R43

4

0

C57

4

1000

p

C554

1000p

R31

2

47k

C53

1000

p

C56

0

1000

p

C61

3

27p

C57

6

220p

C26

5

0.1u

R410

8.2k

R256

5.6k

R81

47k

5C

C51

10u6

.3

R123

0

D50

3

02D

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SPM(CPU51)

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DC SWITCH

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DC SW (8R)

DC SW (8T)

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TM-271E E

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4

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VC

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2SC4649(N,P)Q404

2SK508NV(K52)Q406

2SJ347Q407

2SK508NV(K52)Q405

2SC5108(Y)Q410

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CONT

VDD

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11

12

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3

4

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6

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PLLE(CPU3)

M1MT(CPU76)

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XIN(CPU13)

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MICMT(CPU77)

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NC

DS

T1

DS

T2

DS

T3

DS

T4

VC

C

NC

VS

S

AD

J

NA

RR

OW

WID

E

NC

NCCL

CE

DO

(to

LCD

)

DI(

from

LC

D)

NC

EN

CB

EN

CA

P9M

T

99

100

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

SPM(CPU51)

AMPSW(CPU52)

W/NI(EVOL1)

VOLI(EVOL12)

SW1

SW2

OUT

VCC2VCC1

IN

IN

GND

RD70HVF1-01Q504

AMPSW(CPU52)

MIC

8TC(CPU80)

SPM(CPU51)

8RC(CPU76)

BRI

PC/TV

VOLO(EVOL11)

W/NO(EVOL2)

2SC2412KQ301

8

9

10

11

12

13

14

IC251BA10324AFV

DTMF IN(CPU95)

INT(CPU18)

RESET(CPU10)

SBC(CPU82)

1/2Vcc

SQIN(CPU93)

INT(CPU18)

RESET(CPU10)

SBC(CPU82)

IC35BD4740G

IC31KIA7808AF

IC32NJM78L05UA

AMPSW(CPU52)

VOLO(EVOL11)

SPM(CPU51)

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

Func

CALLVFO

REV

CMHOOK

MICMEPTTGND8CMBL(Key A)

ENCODER A

CM

ENCODER B

MIC KEY

DI(from LCD)

CE

CL

DO

5C

8C

VOL

POWER

RXD

BRI

PTT

GND

ME

MIC

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

SDA

SCL

WP

VCC

SQIN(CPU93)

SBC(CPU82)

RESET(CPU10)

INT(CPU18)

1/2Vcc

DTMF IN(CPU95)

RSSI(CPU92)

IC301TK14489V

SCAN

SCAN

SQLIN

FLAMPO

RFIN

GND

Hy_C

FLAMPI

RSSI

AFO

VCC

IF_IN

DEC1

DEC2

PH_S

QUCO

OSC(B)

OSC(E)

NC

MIX_O

1

2

3

4

5

6

7

8

9

10 11

12

13

14

15

16

17

18

19

20

2SB1132(Q,R)Q9

IC3

LC75854Wor

PT6554LQ

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16S

EG

28

SE

G29

SE

G30

SE

G31NC

NC

NC

CO

M0

CO

M1

CO

M2

CO

M3

KS

1

KS

2

NC

NC

NC

SEG12SEG13

SEG14

SEG15

SEG16

SEG17

SEG18

SEG19

SEG20

SEG20

SEG22

SEG23

SEG24

SEG25

SEG26SEG27

C203

0.027u

0.027u

0.047u

0.027u

0.027u

1000p

1000p

680p

1000p

C206

1000p 0.022u

0.022u

0.022u

0.022u

C207

0.039u

NO

C614

3p

NO

NO

NO

0

0

R119

0

NO

0 0

0

NO

R120

NO

NO

0

R121

0

NO

NO

NO

10k

18k

R204

18k

18k

18k

1M

750k

750k

750k

750k

R207

XF351

49.95MHzL71-0620-05

CF301L72-0993-05

CF302L72-0999-05

C25

9

0.01

u

C26

0

0.01

u

C27

0

4.7u

6.3

R55

0

R:3.22V

R:4.65V

T:1.6V

R:4.02V

R:4.27V

T:4.16V

R:13.8VT:13.45V

T:1.45V

R:0.66V

T:0.48V

R:4.98V

R:2.7V

R:7.9V

R:13.8V

T:0.82V

N:5VW:0V

T:1.23V

R:2.46V

R:4.98V

R:1.8mV(BS OFF) 5V(BS ON)

T:7.55V

R:4.98V

R:7.99V

R:4.92VT:3.9mV

R:13.66VT:12.94V

R:7.04V

R:7.42V

R:4.90V

R:0.74VT:0.62V

R:4.31V

R:3.37V

R:6.11VR:6.17V

R:4.84VT:5.73V

4.98V

R:7.9V

R:0.75V

R:1.15V

R:0.71V

R:0.56V

R:3.37V

R:4.7mV(SQ OFF) 4.97V(SQ ON)

R:2.48V

R:1.44V

R:7.7V

R:6.34V

R:6.64V

R:4.98V

N:0VW:5V

T:1.26V

R:1.74V

T:6.8V

R:3.3V

T:0.88V

4.97V

R:4.98V

R:6.96V

T:6.8V

T:7.82VR:0.97V

R:7.9V

R:4.96V

T:0.76V

T:7.84V

R:1.23V

R:7.95V

R:2.8mV

R:0.1mV

R:0.76V

R:4.05V

R:7.98V

R:5V

R:7.01V

R:2.7V

7.30V

7.90V 7.10V

4.96V

4.94V

4.96V

5.02V

R:7.84V

T:5.61V

T:2.5V

T:1.46V

T:7.85V

R:0.87V

T:4.97V

R:2.88VR:5.86VR:3.16V

7.90V

T:7.84V

4.80V(BRIGHTNESS MAX)0V(BRIGHTNESS OFF)

TM-271A/271E

38

Q4402SC2412K

DT

P1M

IC202BA10358FV

SB

D201DAN222

D2021SS372

KI1

IC203BA10324

(3/4)

IC203BA10324AFV

(1/4)

D/ACONV

MIC KEY

M

PLLE

TCXOMOD

AGCDET


CKLOOPFILTER

KS1

8C

ELV

BUFMIC

MUTECE

8CL

IC201NJM2100V

PLL IC

8RC

CK

RF

SBC

SUM

SW

5C

CM(MIC KEY2)

DI

V

MIC

8C

LIPPLEFILTER

D2~4B30-2205-05

KEY BACK LIGHT

ENCA

SW

BSH

KS2

RXD

HOOK(RXD)

AGC

DTMF

Q2012SC4919

VCO

Q4032SC4738(GR)

TCXO

D/ACONV

WID

POWER

NAR

MIC

IC161 M62363FP

(3/8)

CHARGEPUMP

CHARGEPUMP16.8MHz

IC161M62363FP(8/8)

8TC

BRI

SQIN

8C

CM

SPLATTERFILTER

8C

8C

MIC KEY

MIC/IDC

Q4042SC4649(N,P)

16.8MHz

MIC

PTT(TXD)

DO

ENCB

KI3

ME

Q4072SJ347

IC401MB15A02

LD

DT

VOL

T

CV

5C

Q4022SA1832(GR)

CL

KI2

DTM

Q10KRA225S

5C

Q6KRC102S

VPLLE


Q2SK50

MICMT

D19~30B30-2205-05

LCD BACK LIGHTQ9

2SB1132(Q,R)Q12

UMG3N

SW

MBL

BRI

IC3LCD DRIVERLC75854W/LC75854W/

CLCE

DICOM0~3SEG0~31

MBL

DO

LCD

GNDMEMIC

Q12SK1824

X401

QT/D

TX/R

SPMAFM

AMP

PTT(TXD)

Func

CALLVFO

REV

MR

KI1KI2KI3 KS2

KS1

SQ

CP

KS

PR

1P

R9

PK

D

VR1R31-0649-05

VIARIABLE RESISTORPOWER

D/ACONV

IC161M62363FP

(4/8)

P9MT

P1MT

PKD1200

PKD9600

VOL

P9M

QT/DQTPKD9600

IC205BU4S66

SW

IC204BU4S66

SW

ENCB

MHz

ENCAS1W02-3665-05

ENCODER

PKD1200

BLOCK DIAGRAM

TM-271A/271E

39

BLOCK DIAGRAM

DT

Q332SA1745(6,7)

CF302(NARROW)

D303DAN222

P1MT

SW

8TC

AVR5V

X35149.95MHz

8RC

OVERVOLTAGEDETECT

IC66AT24C64A10SI18 orCAT24WC64J1

RF

IC402UPB1509GV

DIVIDER

D302DAN222

PC

ANT

Q872SK1830

IC203BA10324AFV

(3/4)

BUFF

Vg

V

BUFFER

D301MA742

PLLE

INT

Vg

450kHz

SW

BPF

IC252LA4600

NOISE

D/ACONV

IC501TA75W01FU(1/2)

IC501TA75W01FU(2/2)

WIDE

ANT SW

ELVLLDSW

POWER

PREDRIVEAMP

RF

BUFF

Q3512SC5108(Y)

VCOMOD

CL

SW

CF301(WIDE)

D351,352HVC376B

8RC

CK

IC251 BA10324AFV

Q3533SK318

SBC

TXRX

8C

IC31KIA7808AF

AVR8V

TEMP2

MIX

SW

5M

AFFILTER

TXVCO

SW

Q4112SC4649

(N,P)Q410

2SC5108(Y)

SW

8T8CL

D353,354HVC376B

5CBSHIFT

BSHIFT

8R

SW

SW

Q504RD70HVF1

E

Q35KTA1664(Y)

D607MA742

D606MA742

50.4MHz

B

DET

SW

8R

IC32NJM78L05UA

5M

SW

VCOMOD

R)

WIDE

NARROW

EEPROM

Q252,2532SK3019

8R

RESET

NARROW

D/ACONV

IC33NJM78L05UA

AVR

IC161 M62363FP

(7/8)

3FP

BPF

Q36KRC102S

Q254DTC363EU

IC161M62363FP(2/8)

8T

Q4062SK508NV(K52)

IC35BD4740G

5C

RESET

X86

IC161M62363FP(5/8)(6/8)

IC161M62363FP

(1/8)

IC34BD4732G

DTMF/BEEP

8TC

SQIN

Q32KRC102S

SBC

Q2512SC2412K

PTT

FINALAMP

8C

SPM

MICMT

SIGNALQ34

KRC102S

8T

DRIVEAMP

SB

+B

IFDEMODULATOR

AFPA

AFM

SW

CPUIC101

30622MAA-B85GP

MCF

INT

Q4072SJ347

D602MA4PH633D603,605XB15A709

SW

8T

8T

Q61KRC404RTK

Q3022SC2412K

TRIPLER

INT

TEMP1

APCCONTROL

SW

RXD

TCXOMOD

D/ACONV

CM

CV

R) LPF

8R

POW.DET

POW.DET

SW

D/ACONV

RF

Q503PD55003

Q408KRX102U

Q862SK1830

T/RSW

HPF

DTMF

5M

Q3012SC2412K IF

Q5012SC3357

D409DAN235E

EXT.SP

16.8MHz

Q3523SK318

Q312SA1641(S,T)

RXVCO

RF BPFTUNE

RF BPFTUNE

8R

SP

Q5022SC3357

Q4052SK508NV(K52)

EEPWPEEPCKEESDT

IC301

SWQ255

KRC102S

AMPSW

Q3542SK1830

SW8T

QT/DQT

TX/RX

SPMAFM

AMPSW

CLCEDI

RSSISQIN

8C

8M

PKSSQC

ENCAENCBVOL

P9MT

DOMICKEY2MICKEY

RESET

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TM-271A/271E

40

LEVEL DIAGRAM

To make

G2Q351

3

IC201 IC203

Q353 XF1

7

IC202 IC202

BPF BPF

6 8Q406

ANT

X54-345

G2

91

To make measurements in the RF section, connect the RF level meter.In the RF section, use a 0.01µF coupling capacitor.(The display shows the SSG input value required to obtain 12dB SINA

1

G1

2 2

S

Q352

10

DisplayUnit

D

IC161

TX-RX U

MIC

To make measurements in the AF section, connect the AC level meter.AG is set so that MIC input becomes 3kHz/1.5kHz (Wide/Narrow) DEV at 1kHz MOD.

D

CF1/CF2

450kHz

7

IC203

TX-RX Unit

S

IC301

5

49.95MHz

9

IC201

G1

20

1

Center Frequency

W : –124.0dBmN : –123.5dBm

W : –119.5dBmN : –119.0dBm

W : –104.7dBmN : –103.7dBm

W : –103.9dBmN : –103.4dBm

W : 0.75VrmsN : 0.36Vrms

W : 0.30VrmsN : 0.18Vrms

W : –112.3dBmN : –111.5dBm

W : –92.1dBmN : –90.7dBm

W : –77.6dBmN : –74.2dBm

W/N5.0mVrms (2.0mVrms for E-type)

W/N0.12Vrms

W/N1.40Vrms

W/N1.16Vrms

W/N1.26Vrms

W/N1.04Vrms

Receiver Section

Transmitter Section

TM-271A/271E

41

LEVEL DIAGRAM

S

To make measurements in the RF section, connect the RF Wattmeter (50Ω).

D

Q504

To make measurements in the AF section, connect the AC level meter.(ANT input : –53dBm, 1kHz FM, 3kHz DEV (Wide)/1.5kHz DEV (Narrow))The AF output level is adjusted for a 0.64V/8Ω by the front panel AF VOL control.

Q406

vel meter.

12dB SINAD.)

TX-RX Unit

Q4101

11

Q411

FINAL Amp

Q503

2

D409

TX-RX Unit

S

IC402

Audio Frequency

Q501D

TX-RX Unit (VCO)

CF1/CF2

450kHz

Q502

G

IC301

D602

G

ANT

–5.3dBm –10dBm –4.8dBm 12.5dBm 26.5dBm–8.8dBm 60W

W : –85.0dBmN : –84.5dBm

W/N0.33Vrms

W/N0.32Vrms

W/N0.26Vrms

W/N0.30Vrms

W/N0.31Vrms

W/N10mVrms

W/N0.50Vrms

W/N0.64Vrms

14 J1

IC161

12Q251

89 12

8oh

m

10

IC251

7

IC252IC251

5 1

IC251IC251

1113

KENWOOD CORPORATION2967-3, Ishikawa-machi, Hachioji-shi, Tokyo, 192-8525 Japan

KENWOOD U.S.A. CORPORATIONP.O. BOX 22745, 2201 East Dominguez Street, Long Beach, CA 90801-5745, U.S.A.

KENWOOD ELECTRONICS CANADA INC.6070 Kestrel Road, Mississauga, Ontario, Canada L5T 1S8

KENWOOD ELECTRONICS DEUTSCHLAND GMBHRembrücker Str. 15, 63150 Heusenstamm, Germany

KENWOOD ELECTRONICS BELGIUM N.V.Leuvensesteenweg 248 J, 1800 Vilvoorde, Belgium

KENWOOD ELECTRONICS FRANCE S.A.13, Boulevard Ney, 75018 Paris, France

KENWOOD ELECTRONICS U.K. LIMITEDKENWOOD House, Dwight Road, Watford, Herts., WD18 9EB United Kingdom

KENWOOD ELECTRONICS EUROPE B.V.Amsterdamseweg 37, 1422 AC Uithoorn, The Netherlands

KENWOOD ELECTRONICS ITALIA S.p.A.Via G. Sirtori, 7/9 20129 Milano, Italy

KENWOOD IBERICA S.A.Bolivia, 239-08020 Barcelona, Spain

KENWOOD ELECTRONICS AUSTRALIA PTY. LTD.(A.C.N. 001 499 074)16 Giffnock Avenue, Centrecourt Estate, North Ryde, N.S.W. 2113 Australia

KENWOOD ELECTRONICS (HONG KONG) LTD.Unit 3712-3724, Level 37, Tower one Metroplaza, 223 Hing Fong Road, Kwai Fong, N.T., Hong Kong

KENWOOD ELECTRONICS TECHNOLOGIES(S) PTE LTD.Sales Marketing Division1 Ang Mo Kio Street 63, Singapore 569110

TM-271A/ESPECIFICATIONS

GENERALFrequency Range

TX ............................................................................................ K,M4 : 144~148MHz E : 144~146MHz M2,M3 : 136~174MHzRX ............................................................................................ K,E,M2,M3 : 136~174MHz M4 : 144~148MHz

Mode .......................................................................................... F3E (FM)Antenna Impedance .................................................................. 50ΩUsable Temperature Range ...................................................... –20°C~+60°C (–4°F~+140°F)Power Supply ............................................................................. 13.8V DC± 15% (11.7~15.8V)Grounding Method .................................................................... Negative groundCurrent

Transmit (max.) ...................................................................... K,E,M2,M3 : 13A or less M4 : 8A or lessReceive (at 2W output) ......................................................... 1.0A or less

Frequency Stability (–20°C~+60°C) ......................................... Within ± 2.5ppmDimensions (W x H x D projections not included) ..................... 160 x 43 x 137 mm / 6-5/16 x 1-11/16 x 5-13/32 inchWeight ........................................................................................ Approx. 1.2kg / 2.6lb

RECEIVERCircuitry ....................................................................................... Double conversion superheterodyneIntermediate Frequency (1st / 2nd) ............................................ 49.95MHz / 450kHzSensitivity (12dB SINAD) ............................................................ Wide : 0.18µV or less Narrow : 0.22µV or lessSelectivity

–6dB ........................................................................................ Wide : 12kHz or more Narrow : 10kHz or more–60dB ...................................................................................... Wide : 30kHz or less Narrow : 24kHz or less

Squelch Sensitivity ..................................................................... 0.1µV or lessAudio Output (8Ω, 5% distortion) .............................................. 2W or higher (5% distortion)Audio Output Impedance ........................................................... 8Ω

TRANSMITTERPower Output

High ......................................................................................... K,E,M2,M3 : 60W M4 : 25WLow ......................................................................................... K,E,M2,M3 : Approx. 25W

Modulation .................................................................................. Reactance modulationSpurious Emissions .................................................................... –60dB or lessMaximum Frequency Deviation ................................................. Wide : ±5kHz Narrow : ±2.5kHzAudio Distortion (at 60% modulation) ........................................ 3% or lessMicrophone Impedance ............................................................. 600Ω

Note : All specifications (General,

Transmitter and Receiver) are guaran-

teed within the amateur radio band.

Guarantee K,M2,M3,M4 E

frequency range 144~148MHz 144~146MHz

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