service manual vector vt- 43 r-2 - Автоканалavtokanal.com/_fr/14/service_manual_.pdf ·...
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SERVVICE MMANUAAL VECTORR VT- 443 R-2
CIRCUIT DESCRIPTION
RECEIVER The signal from the antenna is passed through a transmission/reception selector circuit and is amplified by T215. The signal after amplified enter to 1845 for processing then output the audio, the audio signal is amplified by LM4871 and output by the speaker at last.
TRANSMITTER
The signal from the microphone passes through 1845 ,after modulation in the carrier modulation, the modulation signal with the carrier promotes by buffer T151,T141,and amplified by T131 then sends to the antenna terminals.
TRANSMISSION/RECEPTION SELECTOR CIRCUIT
The transmission output is passed through the transmission/reception selector circuit and low-pass filter to the antenna. The transmission/reception selector circuit, which consists of diodes D121, D122 D211 and D212 , is turned on during transmission and off during reception to switch the signal.
CONTROL CIRCUIT The control circuit consists of a microprocessor (U511) and its peripheral circuits. U511 mainly functions as follow: 1) Switching between transmission and reception by the PTT signal input.
2) Reading system, group, frequency, and program data from the memory circuit.
1. Reset and backup circuits
When the SB is turned on, a high level pulse is output from the reset circuit consisting of T535,
C537, and R537 to reset microprocessor. If the SB is turned off, the voltage detection MCU
detects a 5 V drop, and outputs a low signal, it outputs data to U821(24C32) and enters backup
mode.
2.Memory Circuit
Memory circuit consists of the MCU(U511) and an EEPROM (U821). An EEPROM has a capacity of
32k bits that contains the transceiver control program for the MCU and data such as transceiver
channels and operating features.
3. Battery save circuit
The squelch is off during receive. The power circuit enters battery save mode if no key has been
pressed for five seconds.
This circuit is controlled by microprocessor directly.
4. Low Battery Warning
The battery voltage is checked using by the microprocessor. The transceiver generates a warning
tone when it falls below the warning voltage.
5. Keys and rotary encoder circuit
The signal from keys and rotary encoder input to microprocessor directly.
6.LCD control circuit The LCD control circuit is turned on or off by directly flowing current to the microprocessor ports.
1845 DESCRIPTION
MAINLY SECTION DESCRIPTION
1.DSP consists of IF amplifier, FM modulation, RSSI calculator, AFC control circuit,
audio/audio mixer filter, CTCSS/DCS filter and so on.
2.Synthesizer mainly functions
The synthesizer produces a local oscillator signal, used to switch the RF input to a
continuous low medium frequency.
Synthesizer provides the base clock to adjust the VCO frequency.
3.BASE CLOCK
1848 ports more base clocks, for example, 12.8 MHz,13MHz and so on.
4.SERIAL CONTROL INTERFACE
A three lines serial control interface is used to read the main IC and 1845 control
record. Serial control is 24 characters in length, 18 bit numeric string and 6 bit
address string.
Programming software main functions
1 English Chinese programming software
2 Receiving frequency and transmitting frequency
3 Receiving tone and Transmitting tone
4 Time Out Timer
5 Squelch level(1 9) selectable
6 Power save
7 frequency step
8 Store channels
9 VOX sensitivity
10 SCAN TYPE TO/CO/SE
R-201-02
R-201-02
R-201-02
R-201-02
1 2 3 4 5 6
654321
E
D
C
B
A
C557104P
R557
10KR556150K
R555150K
C541103P
D551GREEN
BATTI
BATTI
3V
3VBATTI
R561470R
R5671K
C567102P
D561LED
D562LED
T567DTC114EE
D552RED
R551560R
R552560R
T551DTC114EE
T552DTC114EE
CO
M1
1C
OM
22
CO
M3
3C
OM
44
SE
G0
5S
EG
16
SE
G2
7S
EG
38
SE
G4
9S
EG
510
SE
G6
11S
EG
712
SE
G8
13S
EG
914
SE
G10
15S
EG
1116
SE
G12
17S
EG
1318
SE
G14
19S
EG
1520
SE
G16
21S
EG
1722
SE
G18
23S
EG
1924
SE
G20
25S
EG
2126
SE
G22
27S
EG
2328
SE
G24
29S
EG
2530
SE
G26
31S
EG
2732
SE
G28
33S
EG
2934
SE
G30
35S
EG
3136
LCD
CS1
RD2
WR
3D
ATA
4V
SS
5O
SC
O6
OS
CI
7V
LCD
8V
DD
9IR
Q10
BZ
11B
Z12
COM0 13COM1 14COM2 15COM3 16S31 17S30 18S29 19S28 20S27 21S26 22S25 23S24 24S23
25S
2226
S21
27S
2028
S19
29S
1830
S17
31S
1632
S15
33S
1434
S13
35S
1236
S1137S1038S939S840S741S642
S444S345S246S147S048
S543U525
HT1621
R526100R
R527NC
R327
4K7
C324104PC323
10uF/16V
R3253K9
R326
3K9
C326104P
C325104P
NC1CTS_IN2SQ/GPO33AVDD4IN15IN26AVSS7XTAL28XTAL19NC10
NC
11A
VD
D12
AFO
UT
13A
VD
D14
AV
DD
15A
VS
S16
AV
SS
17V
OX
/GP
O2
34P
DN
35IN
T/G
PO
136
SE
N37
SC
LK38
SD
IO39
NC
40
U251RDA18
C14718P
L1421R0
L143101T
C
47C141NC
R14NC
R14547K
C14470
C145470P
3T
C162470P
C163104P
C24312P
C24115P
C236102P
C235104P
C254103P
C251104P
R251NC
R25222K
R25310K
C253104P
C252103P
C264683P
C271104P
R2711K
GND 1LNAN 2RF GND 3LNAP 4GND 5XTAL 6
RS
T7
SE
N8
SC
LK9
SD
IO10
RC
LK11
VIO
12
AVDD13GND14ROUT15L OUT16GND17DVDD18
GP
IO3
19G
PIO
220
GP
IO1
21N
C22
NC
23G
ND
24
U331RDA5802E
R323NC
R324NC
R54210K
R54110K
R545100R
A0 1A1 2
GND 4DA5 CK6 A2 3WP7 Vcc8
U54124C32
R544100R
C526104P
C52710uF/16V
L526
101T
CHG_DETTXD
AFOP-AMP
KEY_IN1
P-FM
KEY_IN3
LCD_DATALCD_WRLCD_CS
FM_D
ATA
FM_C
LK
RDA1845_PDNRDA1845_ENRDA1845_CLKRDA1845_SDA
CTC/CDS _DETVOX_DET
TX_RF
3VBATTI
T2782SK1824
R279470P
R2781K
R570100K
C570104P
C161104P
R16110K
R16210K
T1612SA1362
C512470P
C513NC
C52222P
C52122P
L5120R
C511104P
L5110R
CR5214.0MHz
3V 3VKE
Y_O
UT2
KE
Y_I
N2
KE
Y_I
N1
KE
Y_O
UT1
KE
Y_I
N3
LCD_CSLCD_WRLCD_DATA
BA
CK
LIG
HT
RLEDGLED
CTC/CDS OUTSQ
AF_MUTE
Out 1
VDD 2NC3
GND4
U531NC C532
104PD531NC
R5320R
R53147K
C531NC
PTT
/RX
D
CH
G_D
ET
PTT/RXD
R57210K
R57310K
R57410K
C32
P-A
MP
P-F
M
RESET
J2RESET
J4TXD
R512
10K
R513
10K
J5VDD
J6GND
J7PTT/RXD
CTC/CDS _DET
R562470R
T1512SC3356
L15118nH
R15222R
L148
0R
C14918P
C152103P
C151470P
C15533P
R151NC
R153
22K
C144NC
R14447R
T1412SK3078
3T
R146120K
C148NC
R53747K
T535
KTC4082(HF)
T546NC
BATTO
R546NC
R547NC
R548NC
C5460R
C273NC
C272103P
C537103P
R5111K
J3RXD
P-RX P-RX
RT22222K C222
20P
RV22150K
R22247K
SEG24 1SEG23/R77 2SEG22/R76 3SEG21/R75 4SEG20/R74 5SEG19/R73 6SEG18/R72 7SEG17/R71 8SEG16/R70 9SEG15/R67 10
SEG12/R64 13SEG13/R65 12SEG14/R66 11
SEG11/R63 14SEG10/R62 15SEG09/R61 16
SE
G08
/R60
17S
EG
07/R
5718
SE
G06
/R56
19S
EG
05/R
5520
SE
G04
/R54
21S
EG
03/R
5322
SE
G02
/R52
23S
EG
01/R
5124
SE
G00
/R50
25R
00/P
EM
0/T0
O26
R04
/BU
ZO27
R05
/INT0
/EC
128
R06
/INT1
29R
07/IN
T230
R10
/PW
M1/
T2O
31R
11/A
CK
/SC
K32
R1233R1334R1435R1536R16/SDA37R17/SCL38R20/AN039R21/AN140R22/AN241R23/AN342R24/AN443AVREF44R4245PLLC46VDD47R4348
R44
49V
SS
50R4
5/X
IN51
R46
/XO
UT
52R
47/R
ES
ETB
53C
OM
054
CO
M1
55C
OM
256
CO
M3
57S
EG
39/C
OM
458
SE
G38
/CO
M5
59S
EG
37/C
OM
660
SE
G36
/CO
M7
61S
EG
2762
SE
G26
63S
EG
2564
U511MC81F8616L
C501NC
XI
XO
RE
SE
T
GND_D
VD
D
ROM_SDAROM_SCKBATT TESTKEY_OUT1KEY_OUT2P-RXKEY_IN1KEY_IN2KEY_IN3PTT/RXDTXD
3V
AP
C
CT
C/C
DS
_DE
T
P-AMPC
TC/C
DS
OU
TB
AC
KLI
GH
TV
OX
_DE
T
AF_MUTEFM_DATAFM_CLK
DTM
F
DT
MF
BE
EP
R569100K
C569
104P
LCD
_CS
LCD
_WR
LCD
_DA
TA
RLE
DG
LED
P-A
MP
VT
X_C
TR P-FM
P-F
MS
Q
CHG_DETRDA1845_SDARDA1845_CLKRDA1845_ENRDA1845_PDN
BEEPB
EE
PBACKLIGHT
MENUVFO
MR ENT
D566LED
R566100R
XOUT 3
VC15C4
GND 2
CR222
13MHz
C322104P
C320102P
R322150R
AP
C
APC
R2911K
C291104P
R29215K
C292224P
C293224P
R25410K
R164NC
R163NC
T165NC
C165NC
7 8 9 10 11 12
121110987
C124102P
C21210P
L121220nH
R123120R
C122470P
C1216P8
L21104/12/4T
C118470P
C1174P
L116
04/15/4T
L114
04/15/4T
L112
04/15/4TCC115
6PC1133P5
C1141P5
C1122P4
C1161P
C2112P
C262104P
R263
1K8
R262
470R
SW586PTT
R5861K
C586102P
D212HSC277
D122HVC131
C2634.7uF/16V
BATTI
MIC
AFO
P-A
MP
3V
3V
L921
68T
SW587MONI
R587
1KC587102P
SW588CALL
R588
1KC588102P
R5921K
TXD
AFO
P-A
MP
D121HVC131
D211HSC277
C92110uF/16V
BATTO
1
2
3
4
JP921JP4
C2150R
C213NC
L212NC
L21304/12/4T
C312103P
C311470P
L317100nH
C31547P
T3152SC4226
R314
100K
R312330R
L313100nH
C314103P
C31852P
NC1CTS_IN2SQ/GPO33AVDD4IN15IN26AVSS7XTAL28XTAL19NC10
NC
11A
VD
D12
AFO
UT
13A
VD
D14
AV
DD
15A
VS
S16
AV
SS
17A
VD
D18
NC
19N
C20
NC 21NC 22RFIN 23NC 24AVDD 25RFOUT 26NC 27AVDD 28PABIAS 29NC 30
NC
31A
VS
S32
CTS
_OU
T33
VO
X/G
PO
234
PD
N35
INT/
GP
O1
36S
EN
37S
CLK
38S
DIO
39N
C40
U251RDA1845
L1421R0
L143101T
L141
2.2nH
C140
470PC141NC
C13939P
T131RFM03U3CT
C13030P
C12930P
C12812P
R137100RR142
NCC142470P
C137470P L129
04/15/8T
L132101T
C131104P
C132103P
C133470P
C134470P
C143470P
C1351uF
3T
SD1Bypass2+in3- in4 Vo1 5VDD 6Vss 7Vo2 8
U351LM4871
R355
100KR356
2K2
C353105P C351
10uF/16VC352103P
C356
105P
E93110uF/16V
C932103P
E93210uF/16V
Out5Gnd 2
Vin 1
CE 3NC4
U931RP103N331D-TR-F
5P
C264683P
C271104P
R237
4R7
R264
560R
C23110uF/16V
C232100P
C238100P
C237104P
C234100P
C233104P
L231101T
GND 1LNAN 2RF GND 3LNAP 4GND 5XTAL 6
RS
T7
SE
N8
SC
LK9
SD
ION
CN
C23
GN
D24
E
T311DTA114YE
P-F
M
P-FM
P-A
MP
J1BATT
RX
D
CR33132.768KHz
CHG_DETTXD
AFOP-AMP
KEY_IN1
P-FM
KEY_IN3
PTT/RXD
R35410K
C21427P
C922102P
C230104P
C12012P
T918DTC114EE
R91810K
R9194K7
178
R138
47KC138470P
3T 3T
R139100K
L21747nH
L31647nHC316
68P
C31752P
C31310P
L13727nH
C136103P
C1574P
C1585P
C923103P
C47
TXD
RX
D
TXDRXD
MIC
BATTI
BATTI3V
L130HL04/12/2T
T351DTC114EE
D931NC
C216103P
T2152SC4226
R215100K
R216330R
C21715P
T216DTA114YE
P-RX
C265683P
C9N
KEY_IN3KEY_IN1
CH
G_D
ET
MIC
R1040.39R1050.39R1060.39
R170150K
R171150K
R172150K
R173150K
R174150KR175
150K
R17710K
R181220K
R18247K
R1831M
R184
330R
R185120K
R186
10K
C173470P
C172NC
C174103P
C175100P
C180470P
C181103P
C187104P
C183102P
2
31
84
U170ALM2904V
76
5
U170BLM2904V
T171DTC114EE
T181DTA114YE
R188
10KC186470P
T1822SK1824
BATTI BATTI
BATTI
BA
TTI
AFO
APC
AP
CA
PC
3T
3T
BATTI3V
3V
R187
10K
C218NC
C219470P
C1644.7uF/16V
10 11 12 13 14 15
A
B
C
D
E
151413121110
SW921ARD810S
32
5
4
1
67
JK351ST-303
L121220nH
R123120R
C1216P8
L21104/12/4T
C118470P
C1174P
L116
04/15/4T
L114
04/15/4T
L112
04/15/4TL1111uHC111
NCC115
6PC1133P5
C1141P5
C1122P4
C1161P
ANT111ANT-2
C2112P
SW586PTT
R5861K
C586102P
D212HSC277
D122HVC131
SP351SP
AFO
P-A
MP
MIC261MIC
L921
68T
SW587MONI
R587
1KC587102P
SW588CALL
R588
1KC588102P
R35710R
C357470P
R5921K
TXD
AFO
P-A
MP
D121HVC131
D211HSC277
12
JK911DC00960-B
C92110uF/16V
BATTO
1
2
3
4
JP921JP4
SD1Bypass2+in3- in4 Vo1 5VDD 6Vss 7Vo2 8
U351LM4871
R355
100KR356
2K2
C353105P C351
10uF/16VC352103P
C356
105P
E93110uF/16V
C932103P
E93210uF/16V
Out5Gnd 2
Vin 1
CE 3NC4
U931RP103N331D-TR-F
20100505
VT- 43 R-2SCHEMATIC DIAGRAM
P-A
MP
J1BATT
RX
D
R35410K
C922102P
T918DTC114EE
R91810K
R9194K7
C923103P
C924470P
TXD
RX
D
TXDRXD
MIC
BATTI
BATTI3V
C2613K3
T351DTC114EE
D931NC
C911NC
KEY_IN3KEY_IN1
CH
G_D
ET
MIC
R1040.39R1050.39R1060.39
R170150K
R171150K
R172150K
R173150K
R174150KR175
150K
R17710K
R181220K
R18247K
83M
R185120K
R186
10K
C173470P
C172NC
C174103P
C175100P
C180470P
C181103P
C183102P
2
31
84
U170ALM2904V
6
5
170B904V
T171DTC114EE
860P
BATTI BATTI
BATTI
BA
TTI
AFO
3T
3T
BATTI3V
3V
R-201-02