panasonic ct - 20g7df chasis dp391

8/13/2019 Panasonic CT - 20G7DF Chasis DP391

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Panasonic

The service technician is required to read and follow the “ safety precautions” and “important safety notice” in this main manual.

Service ManualColor Television

(NA7DM)Simplified Manual

Copyright 2002 by Matsushita Electric Corporation oAmerica. All rights reserved. Unauthorized copyinand distribution is a violation of law.

“WARNING! This Service Manual is designed for experienced repair technicians only and is not designed for use by the general publicIt does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt toservice or repair the product or products dealt with in this Service Manual by anyone else could result in serious injury or death.”

Chassis

CT-20G7DF-1 DP391CT-20D12DF-1 EP391CT-2017F-1 DP391

Models

ORDER NO. MTNC021096A1B1

This supplement service manual is issued to ADD the models of the NA7DM family listed above to the simplifiedservice manual order No. MTNC020515A1 (CT-20D12F). Included in this supplement service manual are uniquecharacteristics and a complete parts list. Please file and use this simplified service manual together with the simplifiedservice manual order No. MTNC020515A1 (CT-20D12F) and the main service manual order No. MTNC010305C1(CT-32D11E).

S i m p l i f i e d

Since “-1” and non dash models have different PCB layouts and parts;When servicing any of these models please confirm the model numberbefore starting service so the correct manual is used.

Important notice:


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Important safety noticeSpecial components are used in this television set which are important for safety. These parts are identified on the

schematic diagram by the symbol and printed in BOLD TYPE on the replacement part list. It is essential thatthese critical parts are replaced with the manufacturer’s specified replacement part to prevent x-ray radiation,shock, fire or other hazards. Do not modify the original design without the manufacturer’s permission.

Safety precautionsGeneral guidelinesAn Isolation Transformer should always be usedduring the servicing of a receiver whose chassis is not

isolated from AC power line. Use a transformer ofadequate power rating as this protects the technicianfrom accidents resulting in personal injury fromelectrical shocks. It will also protect the receiver frombeing damaged by accidental shorting that may occurduring servicing.When servicing, observe the original lead dress,especially in the high voltage circuit. Replace alldamaged parts (also parts that show signs ofoverheating.)Always replace protective devices, such asfishpaper, isolation resistors and capacitors, andshields after servicing the receiver. Use onlymanufacturer’s recommended rating for fuses, circuits

breakers, etc.High potentials are present when this receiver isoperating. Operation of the receiver without the rearcover introduces danger for electrical shock. Servicingshould not be performed by anyone who is notthoroughly familiar with the necessary precautionswhen servicing high-voltage equipment.Extreme care should be practiced when handling thepicture tube. Rough handling may cause it to implodedue to atmospheric pressure. (14.7 lbs per sq. in.). Donot nick or scratch the glass or subject it to any unduepressure. When handling, use safety goggles andheavy gloves for protection. Discharge the picturetube by shorting the anode to chassis ground (not to

the cabinet or to other mounting hardware). Whendischarging connect cold ground (i.e. dag ground lead)to the anode with a well insulated wire or use agrounding probe.Avoid prolonged exposure at close range to unshieldedareas of the picture tube to prevent exposure tox-ray radiation.The test picture tube used for servicing the chassis atthe bench should incorporate safety glass andmagnetic shielding. The safety glass provide shieldingfor the tube viewing area against x-ray radiation as wellas implosion. The magnetic shield limits the x-rayradiation around the bell of the picture tube in additionto the restricting magnetic effects. When using a

picture tube test jig for service, ensure that the jig iscapable of handling 35kV without causingx-ray radiation.Before returning a serviced receiver to the owner,the service technician must thoroughly test the unit toensure that is completely safe to operate. Do not use aline isolation transformer when testing.

Leakage current cold checkUnplug the AC cord and connect a jumper between thetwo plug prongs.Measure the resistance between the jumpered AC plugand expose metallic parts such as screwheads,antenna terminals, control shafts, etc.

If the exposed metallic part has a return path to thechassis, the reading should be between 240kΩ and

5.2MΩ. If the exposed metallic part does not have areturn path to the chassis, the reading should beinfinite.

Leakage current hot check (Fig. 1)

Plug the AC cord directly into the AC outlet. Do not usean isolation transformer during the check.Connect a 1.5kΩ 10 watt resistor in parallel with a0.15µF capacitor between an exposed metallic partand ground. Use earth ground, for example awater pipe.Using a DVM with a 1000 ohms/volt sensitivity orhigher, measure the AC potential across the resistor.Repeat the procedure and measure the voltagepresent with all other exposed metallic parts.Verify that any potential does not exceed 0.75 voltRMS. A leakage current tester (such a Simpson model229, Sencore model PR57 or equivalent) may be usedin the above procedure, in which case any currentmeasure must not exceed 0.5 milliamp. If anymeasurement is out of the specified limits, there is apossibility of a shock hazard and the receiver must berepaired and rechecked before it is returned to thecustomer.

X-ray radiationWARNING: The potential source of x-ray radiation in theTV set are the high voltage section and the picture tube.Refer to x-ray protecton circuit check in servicenotes in this manual to confirm HHS voltage.

High voltage (CRT anode)Confirm anode voltage is within limits:Set the BRIGHTNESS, PICTURE, SHARPNESS andCOLOR to minimum (to obtain a dark image). Measurehigh voltage. It should be:26.60 ± 1.25kV.If the upper limit is out of tolerance, immediate serviceand correction is required.

Note: It is important to use an accurate, calibrated high voltage meter.

0.15µF

COLDWATERPIPE(GROUND)

TOINSTRUMENT’SEXPOSED METALPARTS

1500Ω,10 W

AC VOLTMETER

Figure 1. Hot check circuit



Important safety notice . . . . . . . . . . . . . . . . . . . 2

Safety precautions . . . . . . . . . . . . . . . . . 2General guidelines . . . . . . . . . . . . . . . . . 2Leakage current cold check . . . . . . . . . . 2Leakage current hot check . . . . . . . . . . . 2X-ray radiation. . . . . . . . . . . . . . . . . . . . . 2High voltage (CRT anode) . . . . . . . . . . . 2

Service notes . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Leadless chip component

(surface mount) . . . . . . . . . . . . . . . . 4Component removal . . . . . . . . . . . . . . . . 4Chip component Installation . . . . . . . . . . 4How to replace Flat-IC . . . . . . . . . . . . . . 4X-ray protection circuit check . . . . . . . . . 5

Receiver feature table . . . . . . . . . . . . . . . . . . . . 6

Boards designation . . . . . . . . . . . . . . . . . . . . . . 7

Parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Foldouts notes . . . . . . . . . . . . . . . . . . . . . . . . . 14

A-Board TNP2AH048DR . . . . . . . . . . . . . . . . . 16

C-Board TNP2AA124AF. . . . . . . . . . . . . . . . . . 21

A-Board TNP2AH048DS. . . . . . . . . . . . . . . . . . 22

A & C-PCB Board . . . . . . . . . . . . . . . . . . . . . . . 28



Service notes

Leadless chip component(surface mount)Chip components must be replaced with identical chipsdue to critical foil track spacing. There are no holes inthe board to mount standard transistors or diodes.Some chips capacitor or resistor board solder padsmay have holes through the board, however the holediameter limits standard resistor replacement to 1/8watt. Standard capacitor may also be limited for thesame reason. It is recommended that identicalcomponents be used.Chip resistor have a three digit numerical resistancecode - 1st and 2nd significant digits and a multiplier.Example: 162 = 1600 or 1.6kΩ resistor, 0 = 0Ω (jumper).Chip capacitors generally do not have the valueindicated on the capacitor. The color of the componentindicates the general range of the capacitance.Chip transistors are identified by a two letter code. Thefirst letter indicates the type and the second letter, thegrade of transistor.Chip diodes have a two letter identification code as perthe code chart and are a dual diode pack with eithercommon anode or common cathode. Check the partslist for correct diode number.

Component removal1. Use solder wick to remove solder from component

end caps or terminal.2. Without pulling up, carefully twist the component

with tweezers to break the adhesive.3. Do not reuse removed leadless or chip

components since they are subject to stressfracture during removal.

Chip component Installation1. Put a small amount of solder on the board

soldering pads.2. Hold the chip component against the soldering

pads with tweezers or with a miniature alligator clipand apply heat to the pad area with a 30 watt ironuntil solder flows. Do not apply heat for more than3 seconds.

How to replace Flat-IC- Required tools -

1. Cut the pins of the defective IC with the wire cutterspliers, and remove it completely away from theboard. If the IC is glued to the board, apply hot airto complete the removal. CAUTION- Do not pull ortwist the pliers, may damage the soldering pads inthe board.

2. Using the soldering Iron and the long nose pliers,remove the IC pins that still attached to the board.

3. Using the de-solder braid and the soldering iron,remove the solder from the board soldering pads.

4. Position the new Flat-IC in place (apply the pins of

the Flat-IC to the soldering pads where the pinsneed to be soldered). Properly determine thepositions of the soldering pads and pins bycorrectly aligning the polarity symbol. Start aligningand soldering pin no.1, then align and solder thepin in the apposite corner of the IC, this will help toalign the rest of the pins.

5. Solder all pins to the soldering pads using a finetipped soldering iron.

6. Check with a magnifier for solder bridge betweenthe pins or for dry joint between pins and solderingpads. To remove a solder bridge, use a de-solderbraid as shown in the figure below.

Note: These components are affixed with glue. Be careful not to break or damage any foil under the component or at the pins of the ICs when removing. Usually applying heat to the component for a short time

while twisting with tweezers will break the component loose.

c

b

e

Chip components

TRANSISTOR CAPACITOR

RESISTORMH DIODE

SOLDERCAPS

SOLDERCAPS

1ST DIGIT 2ND DIGIT

MULTIPLIER=1600 = 1.6k

GRADE

TYPE

COMMON

ANODES

CATHODE

• Soldering iron • De-solder braids

• Sharpen pliers (wire

cutters and long nose)

• Magnifier

Componenteplano

Cautin

mallapara desoldar

cautinIron

Muesca 2do punto1er punto

Cautin conpunta fina

Soldadura

MallaPuente(en corto) Cautin



Service notes (continued)IMPORTANT: To protect against possible damage tothe solid state devices due to arcing or static discharge,make certain that all ground wires and CTR DAG wireare securely connected.

CAUTION: The power supply circuit is above earthground and the chassis cannot be polarized. Use an

isolation transformer when servicing the receiver toavoid damage to the test equipment or to the chassis.Connect the test equipment to the proper ground ( ) or( ) when servicing, or incorrect voltages will bemeasured.

WARNING: This receiver has been designed to meetor exceed applicable safety and x-ray radiationprotection as specified by government agencies andindependent testing laboratories.

To maintain original product safety design standardsrelative to x-ray radiation and shock and fire hazard,

parts indicated with the symbol on the schematicmust be replaced with identical parts. Order parts fromthe manufacturer’s parts center using the partsnumbers shown in this service manual, or provide thechassis number and the part reference number.

For optimum performance and reliability, all other partsshould be replaced with components ofidentical specification.

X-ray protection circuit check

This test must be performed as final check before thereceiver is returned to the customer. If voltage is out of

tolerance, immediate service and correction is requiredto insure safe operation and to prevent the possibility ofpremature component failure.

Equipment needed to check the protection circuit:

1. Isolator transformer.2. High voltage meter.3. Short jumper.4. Diode connection jumper.

Use similar diode than D823, refer to parts list for part No., (diode should support at least 150V.)

Procedure:1. Connect receiver to isolator transformer.2. Apply a monoscope pattern.3. In service mode. (Refer to service mode section

select register C0B.4. Measure TP5 (TPs port close to tuner). Compare

the measure of TP5 and set the data for C0Baccording the following table

5. Exit service mode and turn receiver OFF.6. Connect a jumper from TPD16 to TPD17.7. Connect the diode jumper , cathode to TPD14

(cold GND), anode to TPD15 (hot GND).Note: Refer to Fig. 2 for test point location.

8. Apply 75V AC to the AC input of the Insulato

transformer.Turn receiver ON.9. Set PICTURE and BRIGTHNESS to minimum.10. Increase the AC voltage at the input of Insulator

transformer and confirm the HHS voltage is32.0kV, at the point set starts to loose sync,

11. Reset picture controls to original levels.12. Turn the set OFF, and remove all jumpers and

connections from chassis.

TP5MEASURE (V)

DATA TOC0B (Hex)

0 ~ 0.93 00

0.93 ~ 0.97 01

0.97 ~ 1.01 02

1.01 ~ 1.05 03

1.05 ~ 1.09 04

1.09 ~ 1.13 05

1.13 ~ 1.17 06

1.17 ~ 1.21 07



Receiver feature table

FEATURE\MODEL CT-20G7DF-1 CT-20D12DF-1 CT-2017F-1

Chassis No DP391 EP391 DP391

Family NA7DM

Number of channels 181

Menu language ENG/SPAN/FR

Closed Caption X

V-Chip (USA/CANADA) X

75 Ω input X

Remote Model number EUR501450 EUR511502 EUR501450

Picture tube Supplier SAMSUNG

Comb Filter 2 DIG

V/A norm V

MTS/SAP/DBX X

Built-in audio power 1.5Wx2 (10%)

Number of speakers 2

AI Sound X

A/V in (rear/front) 1(1/1)

Audio Out (F:FAO/V:VAO) --- F,V ----

S-VHS In (rear/front) --- 1/0 ----

FM Radio --- X ---

EPJ/HPJ/MISC HPJ

Dimensions mm(WxDxH) in

515.7x490.5x461.720.30x19.31x18.17

Weight (kg/lbs) 18/39.6Anode voltage 26.60 ± 1.25 kV

Video input jack 1Vp-p 75Ω, phono

Audio input jack 500mV rms, 47KΩ

Table 1. Receiver features

Specifications are subject to change without notice or obligation.Dimensions and weights are approximate.


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REPLACEMENT PARTS LISTModels: CT-20G7DF-1, CT-20D12DF-1, CT-2017F-1

Important Safety Notice: Components printed in BOLD TYPE have special characteristics important for safety. When replacingany of these components use only manufacturer’s specified parts.

302-02

P A R T S

L I S T

REFNO. PART NO. DESCRIPTION

CAPACITORS

C001 TCJ2VB1H103K CAP,C .01UF-K-50V

C002 TCJ2VB1H471K CAP,C 470PF-K-50V

C003 ECA1HM4R7B CAP,E 4.7UF-50V

C004 TCJ2VC1H150J CAP,C 15PF-J-50V


C008 TCJ2VF1H104Z CAP,C .1UF-Z-50V

C009 ECA1AM470B CAP,E 47UF-10V



C015 ECJ2VB1C224K CAP,C .22UF-K-16V


C017 TCJ2VB1C104K CAP,C .1UF-K-16V










C029 ECQB1H333JF3 CAP,P .033UF-J-50V

C031 ECA1HMR22B CAP,E .22UF-50V




C035 ECA1HM010B CAP,E 1UF-50VC036 TCJ2VB1H103K CAP,C .01UF-K-50V

C037 ECA1HM0R1B CAP,E 0.1UF/50V










C048 TCJ2VC1H220J CAP,C 22PF-J-50VC050 ECA1AM101B CAP,E 100UF-10V



CT-20D12DF-1



CT-20D12DF-1

C103 ECA0JM331B CAP,E 330UF-6.3V



C350 ECA1CM101B CAP,E 100UF/16V




C354 ECKW3D102KBN CAP,C .001UF-K-2KVDC

C357 EEANA1E1R0B CAP,E 1.0UF-25VC361 TCJ2VC1H151J CAP,C 150PF-J-50V



C451 ECA1CHG470B CAP,E 47UF-16V

C452 ECSF1EE105VB CAP,E 1.0UF-25V

C453 ECEA1HFS2R2B CAP,E 2.2UF-50V

C454 ECA1EM102E CAP,E 1000UF-25V

C455 ECA1EHG101B CAP,E 100UF-25V


C459 ECA1VHG471B CAP,E 470UF-35V





C510 ECCR2H100D5 CAP,C 10PF-D-500V

C511 ECKR2H821KB5 CAP,C 820PF-K-500V

C512 ECKR2H101KB5 CAP,C 100UF-K-500V


C531 ECA1EM220B CAP,E 22UF-25V

C551 ECA1VM331B CAP,E 330UF-35V



C556 ECA1CM471B CAP,E 470UF-16V



C560 EEANA1E2R2B CAP,E 2.2UF-25V



C563 ECWH12H362JS CAP,P 3600PF-J-1250VDC

C564 ECWH12H562JS CAP,P .0056UF-J-1.2KV

C565 ECKW3D331JBR CAP,C 330PF-J-2KV

C566 ECKW3D181JBP CAP,C 180PF-J-2KV

C568 ECQM4473JZW CAP,P .047UF-J-400V

C569 ECWF2394JBB CAP,P .39UF-J-200V

C570 ECA1CM222E CAP,E 2200UF-16VC571 ECA1EM220B CAP,E 22UF-25V





C578 ECA0JM332B CAP,E 3300PF-6.3V

C579 TCJ2VC1H100D CAP,C 10PF-J-50V









- 9 -302-02 Parts List

C800 ECKR3A391KBP CAP,C 390PF-K-1KVDC

C801 ECKWAE472ZED CAP,C 4700PF-Z-500V



C805 EC0S2DA221BB CAP,E 220UF/200VC806 ECQM4103KZW CAP,P .01UF-K-400V

C807 ECKR3A821KBP CAP,C 820PF-K-1KV

C808 ECA1VM101B CAP,E 100UF-35V



C812 ECQU2A224MVA CAP,P .22UF-M-250VAC






C823 ECA1VM471E CAP,E 470UF-35V


C825 EEUMG2C221S CAP,E 220UF-160V



C828 ECA160V33UE CAP,E 33UF/160V





C2204 AP106K016CAE CAP,T 10UF/16V



C2207 AP335K016CAE CAP,T 3.3UF/16V







C2215 E EANA1E100B CAP,E 10UF-25V

C2216 TCJ2VC1H100D CAP,C 10PF-J-50V


C2302 ECEA1HN010UB CAP,E 1UF/50VC2303 ECA1EM101B CAP,E 100UF-25V



C2309 ECA1HM010B CAP,E 1UF-50V CT-20D12DF-1


C2312 ECEA1HN010UB CAP,E 1UF/50V




C2319 ECA1HM010B CAP,E 1UF-50V CT-20D12DF-1




C2350 ECA1HM100B CAP,E 10UF/50V


C3012 ECA1HM010B CAP,E 1UF-50VC3018 ECA1HM010B CAP,E 1UF-50V


CT-20D12DF-1


CT-20D12DF-1

DIODES

D002 MA2C165001VT DIODE

D006 MAZ43300HF DIODE, ZENER

D052 MAZ40680MF DIODE, ZENER



D451 B0EAKL000008 DIODE, RECTIFIERD452 MAZ40470MF DIODE, ZENER





D531 B0HAHP000008 DIODE

D551 B0HAMM000072 DIODE, FAST RECOVERY

D554 AU02V0 DIODE


D558 B0HANV000008 DIODE

D559 BYD33G-113 DIODE

D561 AU02V0 DIODED606 MA2C165001VT DIODE

D607 MA3X152K0L DIODE



D801 D3SBA60-4103 DIODE

D806 TAP2AA0001 PTC 5-OHM

D808 SARS01V1 DIODE

D809 B0HAJP000015 DIODE





D821 MAZ40470HF DIODE, ZENER

D822 B0HAMM000103 DIODE

D823 S3L60P154004 DIODE

D824 B0HAMM000072 DIODE, FAST RECOVERY

D2305 MAZ31100ML DIODE, ZENER CT-20D12DF-1











302-02

P A R T S

L I S T




D3001 MAZ31100ML DIODE, ZENER

D3003 MAZ31100ML DIODE, ZENERD3004 MAZ31100ML DIODE, ZENER









FUSES

F801 XBA2A00101 FUSE 6.3A 125V

INTEGRATED CIRCUITS

IC001 M65584MA-104 MPU/VCJ

IC002 TVR2AJ149S EEPROM

IC003 PIC-37042SR IR RECEIVER

IC005 PQ1X331M2ZP VOLTAGE REGULATOR, 3.3V

IC006 MN1280R RESET

IC451 LA7837-TV V OUT

IC551 AN78L09 VOLTAGE REGULATOR 9V

CT-20D12DF-1

IC551 AN78M09LB VOLTAGE REGULATOR 9V

CT-20G7DF-1, CT-2017F-1

IC552 AN78M05LB VOLTAGE REGULATOR PLUS

5V AVR

IC553 AN78M05LB VOLTAGE REGULATOR PLUS

5V AVR

IC801 STRG5623A POWER SUPPLY, 360V

IC2201 AN5829S-E1V MTS, S-AGC

IC2301 AN17800A AUDIO AMP CT-2017F-,1,

CT-20G7DF-1

IC2301 AN17801A AUDIO AMP CT-20D12DF-1

IC2302 AN17800A AUDIO AMP CT-2017F-,1,

CT-20G7DF-1

IC2302 AN17801A AUDIO AMP CT-20D12DF-1

COILS

L001 EXCELSA35T FERRITE BEAD

L003 TLUABTA6R8K COIL, 6.8UH

L004 TLUABTA6R8K COIL, 6.8UH

L005 EXCELDR35V FERRITE BEAD



L008 G0C470KA0029 COIL, PEAKING 47UH

L009 EXCELSA35V FERRITE BEAD

L010 ELESN330JA COIL, PEAKING 33UH

L011 ELESN330JA COIL, PEAKING 33UH


L014 ELESN180KA COIL, PEAKING 18UH




L017 G0C100KA0029 COIL, PEAKING 10UH


L021 G0C470KA0029 COIL, PEAKING 47UHL022 EXCELSA39V FERRITE BEAD


L104 G0C2R2KA0029 COIL, PEAKING 2.2UH








L551 ELH5L4101 COIL

L801 ELF15N011A LINE FILTER

L802 ELEKE680KA COL, PEAKING 68UH

L803 TALL08T680KA COIL





L2350 ELESN4R7JA COIL, PEAKING 4.7UH

TRANSISTORS

Q001 2SD601ARTX TRANSISTOR

Q006 2SB709ARTX TRANSISTOR



Q009 2SC1473A TRANSISTOR



Q351 2SC3063RL TRANSISTOR







Q452 2SD601ARTX TRANSISTORQ453 2SD601ARTX TRANSISTOR

Q501 2SC1573AH TRANSISTOR



Q551 2SC562200VLA TRANSISTOR



Q820 2SA1767QTA TRANSISTOR

Q830 2SB1011QRL TRANSISTOR







- 11 -302-02 Parts List

RELAYS

RL801 K6B1AGA00042 RELAY

RESISTORS

R001 ERJ6GEYJ102V RES,M 1K-J-1/10W

R003 ERJ6GEYJ105V RES,M 1M-J-1/10WR004 ERJ6GEYJ562V RES,M 5.6K-J-1/10W

R006 ERDS2TJ101T RES,C 100-J-1/4W

R007 ERJ6GEYJ471V RES,M 470-J-1/10W


R009 ERJ6GEYJ472V RES,M 4.7K-J-1/10W

















R032 ERJ6ENF1002V RES,M 10K-F-1/10W












CT-20D12DF-1


CT-20G7DF-1, CT-2017F-1


CT-20D12DF-1




CT-20D12DF-1




R091 ERJ6GEYJ185V RES,M 1.8MEG-J-1/10W





CT-20D12DF-1

R202 ERJ6GEYJ102V RES,M 1K-J-1/10WCT-20D12DF-1


CT-20G7DF-1, CT-2017F-1

R351 ERG2FJ123H RES,M 12K-J-2W



R354 ERDS1TJ272T RES,C 2.7K-J-1/2W



R357 ERJ6ENF4300V RES,M 430-F-1/10W


R359 ERJ6ENF4300V RES,M 430-F-1/10WR360 ERJ6ENF7500V RES,M 750-F-1/10W






R370 ERDS2TJ224T RES,C 220K-J-1/4W




R384 ERJ6ENF2701V RES,M 2.7K-F-1/10W

R385 ERJ6ENF7501V RES,M 7.5K-F-1/10WR386 ERJ6ENF1201V RES,M 1.2K-F-1/10W








R451 ERDS1FJ1R2P RES,C 1.2-J-1/2W



R456 ERJ6GEYJ472V RES,M 4.7K-J-1/10WR457 ERJ6GEYJ152V RES,M 1.5K-J-1/10W















302-02

P A R T S

L I S T





R502 ERJ6GEYJ562V RES,M 5.6K-J-1/10WR504 ERDS2TJ272T RES,C 2.7K-J-1/4W





R510 ERG3FJ272 RES,M 2.7K-J-3W

R512 ERG2FJ562H RES,M 5.6K-J-2W



R531 ERD25FJ470P RES,C 47-J-1/4W



R551 ERDS1FJ1R0T RES,C 1.0-J-1/2W


R555 ERDS1FJ101T RES,C 100-J-1/2W

R556 ERG1SJ221P RES,M 220-J-1W


R558 ERQ2CJP2R2S RES,F 2.2-J-2W


R562 ERG3FJ680H RES,M 68-J-3W

R563 ERG1SJ150P RES,M 15-J-1W











R801 ERF7ZK1R5 RES,W 1.5-K-7W


R803 ERG2FJ100H RES,M 10K-J-1/2W

R804 ERG2FJ104H RES,M 100K-J-2WR805 ERX2FZJR18H RES,M .18-J-2W

R806 ERX2FJR56H RES,M .56-J-2W


R808 ERDS2TJ4R7T RES,C 4.7-J-1/4W

R809 ERDS2TJ472T RES,C 4.7K-J-1/4

R815 ERC12ZGM825D RES,S 8.2MEG-M-1/2

R817 ERX3FJ6R8 RES,F 6.8-J-3W



R823 ERDS1FJ272T RES,C 2.7K-J-1/2W






R831 ERDS2TJ682T RES,C 6.8K-J-1/4WR850 ERQ12HJR56P RES,F .56-J-1/2W






R2301 E RQ2CJP3R9S RES,F 3.9-J-2W



CT-20D12DF-1


R2351 ERJ6GEYJ562V RES,M 5.6K-J-1/10WR2352 ERJ6GEYJ683V RES,M 68K-J-1/10W









CT-20D12DF-1


R3005 ERJ6GEYJ334V RES,M 330K-J-1/10WR3007 ERJ6GEYJ151V RES,M 150-J-1/10W





R3013 ERJ6ENF75R0V RES,M 75.0-F-1/10W

CT-20D12DF-1

R3014 ERJ6ENF75R0V RES,M 75.0-F-1/10W

CT-20D12DF-1



R3018 ERJ6GEYJ682V RES,M 6.8K-J-1/10WR3019 ERJ6GEYJ682V RES,M 6.8K-J-1/10W


CT-20D12DF-1


CT-20D12DF-1

SWITCHES

S001 EVQPF106K SWITCH










- 13 -302-02 Parts List



TRANSFORMERS

T501 ETH19Y211AZ TRANSFORMER

T551 KFT3AA341F TRANSFORMER, FLYBACKT801 ETS29AS183NC TRANSFORMER

CRYSTALS/FILTERS

X001 TSSA092 CRYSTAL OSCILLATOR

X002 AF080005BE CRYSTAL

OTHERS

TNR001 ENG36604GR TUNER CT-2017F-,1,

CT-20G7DF-1

TNR001 ENG36610G TUNER CT-20D12DF-1

M001 TSX2AA0111-1 LINE CORD (SPT2)

M002 A51KRE89XDT CRT 20”

M003 TJSC00300 CRT SOCKET

M004 0FMK014ZZ CONVERGENCECORRECTOR STRIP

M005 JH291U-009 YOKE, CONVERGENCE

DY TLY2AA001 DEFLECTION YOKE

M006 TMM2A30702 WEDGE, YOKE

M007 TXF3A011DB2 ASSY. DAG GROUND

DEG TSP2AA008 COIL, DEGAUSSING 20 INCH

M008 T SN63115-4 MAGNET, PURITY

M009 TAS2AA0012 SPEAKER 16-OHM 1.5W

M010 TXFKU05ESER ASSY, CABINET BACK

CT-20G7DF-1

M011 TXFKU06BSER ASSY, CABINET BACK

CT-2017F-1

M012 TXFKU06ESER ASSY, CABINET BACK

CT-20D12DF-1


M013 TBM2A10141 BADGE, PANASONIC

M014 TBX2AA0121 BUTTON, 7-KEY CT-20G7DF-1

CT-20D12DF-1

M015 TBX2AA1701GS BUTTOM, 7-KEY CT-2017F-1

M016 TKX2AA00401 IR GUIDE CT-2017F-1

M017 TKX2AA00404 IR GUIDE CT-20G7DF-1

CT-20D12DF-1

M018 TXFKY06ESER ASSY, CABINET FRONT

CT-2017F-1

M019 TXFKY09FSER ASSY, CABINET FORNT

CT-20G7DF-1, CT-20D12DF-1

JK3001 TJB2A9063B ASSY. JACK 1A/V

CT-20D12DF-1

JK3001 TJB2A9064B ASSY. JACK A/V CT-2017F-,1,

CT-20G7DF-1

JK3002 TJB2AA0046 TERMINAL, FRONT A/V

JK3003 TJB2AA0171 TERMINAL, S-VHS

CT-20D12DF-1ACCESORIES

M020 EUR501450 REMOTE CONTROL

CT-20G7DF-1, CT-2017F-1

M021 EUR511502 REMOTE CONTROL

CT-20D12DF-1

M022 UR50EC1190ABATTERY COVER, REMOTECONTROL CT-2017F-,1,

CT-20G7DF-1

M023 UR51EC975ABATTERY COVER, REMOTECONTROL

CT-20D12DF-1

M024 TQB2AA0370-2 OWNERS MANUAL

CT-2017F-1

M025 TQB2AA0431-2 OWNERS MANUAL

CT-20G7DF-1, CT-20D12DF-1


DESCRIPTION OF ABBREVIATIONS GUIDE

RES, C 270-J-1/4

CAP, P .068UF-K-50V

RESISTOR

TYPE TOLERANCE

C Carbon F ± 1%

F Fuse J ± 5%

M Metal Oxide K ± 10%

S Solid M ± 20%

W Wire Wound G ± 2%

CAPACITOR

TYPE TOLERANCE

C Ceramic C ± 0.25pF

E Electrolytic D ± 0.5pF

P Polyester F ± 1pF

S Styrol J ± 5%

T Tantalum K ± 10%

L ± 15%

M ± 20%

P +10% -0%

Z +80% -20%



Notes

SCHEMATIC NOTES1. Resistors are carbon 1/4W unless noted

otherwise.2. Capacitors are ceramic 50V unless noted

otherwise.3. Coil value notes is inductance in µH.4. Test point indicated by ; Test point but no

pin .5. Components indicated with are critical

parts and replacement should be madewith manufacture specified replacementparts only.

6. (BOLD LINE) indicates the routeof B+ supply.

7. The schematic diagrams are current atthe time of printing and are subject tochange without notice.

8. Ground symbol indicates HOTGROUND CONNECTION;indicates COLD GROUND.

NOTE: All other component symbols are

used for engineering design

purposes.

WAVEFORM MEASUREMENTS1. indicates waveform measurement.

(Measurement can be taken at the bestaccessible location in common to theindicated point.)

2. Taken with an NTSC signal generatorconnected to the antenna terminal.

(NTSC color bar pattern of 8 bars of EIAcolors, 100 IRE white and 7.5 IRE black.)

3. Customer Controls (Picture/Audio Menu) areset to Normalize. Volume is set to “MIN”.

4. All video and color waveforms are takenwith a wideband scope and a probewith low capacitance (10 to 1). Shapeand peak alti tudes may varydepending on the type of Oscilloscopeused and its settings.

5. Ground symbol shown on waveformnumber indicates (Hot) ground leadconnection of the Oscilloscope.

CAUTION: Incorrect ground connection of

the test equipment will result in erroneous

readings.

3

VOLTAGE MEASUREMENTS1. Voltage measurement:

- AC input to the Receiver is 120V.NTSC (HD, 1125i & 525P whenapplicable) signal generator isconnected to the antenna of theReceiver. (Color bar pattern of 100IRE white and 7.5 IRE black.)

- All Picture and Audio adjustments areset to Normalize.TV ANT/CABLE - (Set-Up Menu) in

TV/ANT ModeVolume - Min.TV/Video SW - TV positionAudio Mode - Stereo

- Voltage readings are nominal andmay vary ±10% on active devices.Some voltage reading will varywith signal strength and picturecontent.

- Supply voltages are nominal.

2. Ground symbol indicates ground leadconnection of meter.Incorrect ground connection will resultin erroneous readings.

CAUTION: Incorrect ground connection of the test equipment will result in

erroneous readings.

IMPORTANT SAFETY NOTICETHIS SCHEMATIC DIAGRAM INCORPORATES SPECIALFEATURES THAT ARE IMPORTANT FOR PROTECTION FROMX-RADIATION, FIRE AND ELECTRICAL SHOCK HAZARDS.WHEN SERVICING IT IS ESSENTIAL THAT ONLYMANUFACTURERS SPECIFIED PARTS BE USED FOR THECRITICAL COMPONENTS DESIGNATED WITH A IN THESCHEMATIC.

B

E C

CHIP TRANSISTORLEAD DESIGNATION


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TNP2AH048DR CT-2017F-1, CT-20G7DF-1


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NOTE

NOTES


http://slidepdf.com/reader/full/panasonic-ct-20g7df-chasis-dp391 28/30- 28 -A & C PCB BOARD ALL MODELS


http://slidepdf.com/reader/full/panasonic-ct-20g7df-chasis-dp391 29/30- 29 - A & C PCB BOAALL MODELS

panasonic ct - 20g7df chasis dp391

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