ORDER NO. MTNC020515A1 B1 Service Manual · characteristics and a complete parts list. ... 229,...

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 ofAmerica. All rights reserved. Unauthorized copyingand 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 public.It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.Productspoweredbyelectricityshouldbeservicedorrepairedonlybyexperiencedprofessionaltechnicians. Anyattempttoserviceor repair the product or products dealt with in this Service Manual by anyone else could result in serious injury or death.”

ChassisCT-20G7DF AP391CT-20D12DF BP391

Models

ORDER NO. MTNC020515A1B1

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

Simplif

ied

- 2 -

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 used duringthe servicing of a receiver whose chassis is notisolated 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, circuitsbreakers, 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 picture tubeby shorting the anode to chassis ground (not to thecabinet 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 aswell as implosion. The magnetic shield limits the X-rayradiation around the bell of the picture tube in additionto the restricting magnetic effects. When using apicture 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 , theservice 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 and5.2MΩ. 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, calibratedhigh voltage meter.

0.15µF

COLDWATERPIPE(GROUND)

TOINSTRUMENT’SEXPOSED METALPARTS

1500Ω,10 W

AC VOLTMETER

Figure 1. Hot check circuit

- 3 -

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Leadless chip component(surface mount) . . . . . . . . . . . . . . . . 4

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

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

Chasis service adjustment procedures. . . . . . 7

130.0V B+ voltage confirmation . . . . . . . 7Source voltage chart. . . . . . . . . . . . . . . . 7High voltage check . . . . . . . . . . . . . . . . . 7

Audio signal path block diagram . . . . . . . . . . . 8

Video signal path block diagram . . . . . . . . . . . 9

Parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Foldouts, voltages & waveforms . . . . . . . 18~31

- 4 -

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 ofthe 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 thecomponent or at the pins of the ICs when removing. Usually applying heat to the component for a short timewhile 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 (wirecutters and long nose)

• Magnifier

Flat-IC

Solderingiron

De-Solderbraid

Solderingiron

Polaritysymbol

Solderingiron

Solder

De-Solderbraid

Solderbridge

Solderingiron

- 5 -

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 anisolation 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 checkThis test must be performed as final check before thereceiver is returned to the customer. If voltage is out oftolerance, 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 forpart 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 Insulatortransformer.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

- 6 -

Receiver feature table

*Note: When ordering a board, add and ” S” after the board suffix application.Example, If order A-Board for CT-20G7DF, should be ordered as: TNP2AH040DHS.

FEATURE\MODEL CT-20G7DF CT-20D12DF

Chassis No AP391 BP391

Family NA7DM

Number of channels 181

Menu language Eng/Span/Fr

Closed Caption X

V-Chip X

75 Ω input X

Remote Model number EUR501450 EUR511502

Picture tube type PANABLACK

Picture tube Supplier SAMSUNG

Comb Filter 2 DIG

V/A norm V

FM Radio ---- X

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

EPJ/HPJ/MISC HPJ

Dimensions mm(WxDxH) in

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

Weight (kg/lbs) 18/39.6

Anode voltage 26.60 ± 1.25 kV

Video input jack 1Vp-p 75Ω, phono

Audio input jack 500mV rms, 47KΩ

A-Board TNP2AH040 DH* DK*

C-Board TNP2AA106 AF*

Table 1. Receiver features

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

- 7 -

Chasis service adjustment proceduresAll service adjustments are factory preset and should not require adjustment unless controls and/orassociated components are replaced.

Note: Connect the (-) lead of the voltmeter to the appropriate ground. Use IC801’s heat sink when the HOTground symbol ( ) is used. Otherwise, use COLD ground ( ) — tuner shield, IC451’s heat sink or FA2.

COMPONENTS WITHIN DOT LINES ARE LOCATED AT THE OPOSITE SIDE OF BOARD.

130.0V B+ voltage confirmation1. Set the BRIGHT and the PICTURE to minimum by

using the PICTURE menu.2. Connect the DVM between C825 (+ side) and cold

ground ( ).3. Confirm that B+ voltage is 130.0V ± 2.5V. This

voltage supplies B+ to the horizontal output &flyback circuits.

Source voltage chart120V AC line input. Set the BRIGHT and the PICTUREto minimum by using the PICTURE menu. Use coldground ( ) for the (-) lead of the DVM.

Adjust PICTURE menu for normalized videoadjustments.

High voltage check1. Select an active TV channel and confirm that the

horizontal is in sync.2. Adjust BRIGHTNESS and PICTURE using picture

icon menu, so video just disappears.3. Confirm B+ 130V is within limit.4. Using a high voltage meter confirm that the high

voltage is:26.60kV±1.25kV

Figure 2. A-Board maincomponentsand test points

TPD8

SCREENFOCUS

IC552

IC551

COLD ( )

HOT ( )

F801

D554

IC451A11

IC001

IC801

C825

FA1

DATA

CLK

FA2

TPD9

D561

IC003IC002

CRTGND

IC2301

IC2302

IC050

TPD16

TPD15

TPD17

TPD14

TPE11

TPE10TUNER

LOCATION VOLTAGE

TPD8 26.0V ± 2V

TPD9 25.0V ± 2V

IC552 Pin3 5.0V ± 0.25V

IC551 Pin3 9.0V ± 0.25V

D554 Cathode 200V ± 15V

LOCATION VOLTAGE

- 8 -

Audio signal path block diagram

Figure 3. Audio signal block diagram

MA

IN T

UN

ER

TN

R00

1

A/V

2

IC22

01M

TS

AN

N58

29S

-E1V

.

LEF

T&

RIG

HT

CH

AN

NE

LS

14

23

A/V

1

LEF

TLE

FT

RIG

HT

RIG

HT

LE

FT

INR

IGH

T IN

MP

X IN

FR

ON

T A

/VJK

3001

RE

AR

A/V

JK30

02

IC00

1M

PU

/VC

JM

6558

0MA

P10

2221LE

FT

RIG

HT

LE

FT

OU

T

RIG

HT

OU

T

64

LE

FT

CH

AN

NE

LA

UD

IO A

MP

3 6

RIG

HT

CH

AN

NE

LA

UD

IO A

MP

3 69 9

TV

IN

67

VO

L

SP

SW

VO

L

TV

IN

VO

L

SP

SW

SP

/ C

P

RE

AR

A/V

JK30

02

LEF

TS

PE

AK

ER

RIG

HT

SP

EA

KE

R

+ - +-

5 510 10

LEF

TO

UT

RIG

HT

OU

T

A-B

OA

RD

LE

FT

OU

T

RIG

HT

OU

T

VA

O

VA

O

AU

DIO

OU

T

on

ly fo

r CT-

20D

12D

F

- 9 -

Video signal path block diagram

Figure 4. Video signal block diagram

MA

IN T

UN

ER

TN

R00

1

A/V

2

26

A/V

1

TV

IN

FR

ON

T A

/VJK

3001

RE

AR

A/V

JK30

02

IC00

1M

PU

/VC

JM

6558

0MA

P10

A-B

OA

RD

20EX

T

59

6

23

9

41

8

Q00

6

Q00

7

Q00

83228 30

HA

LF

-T

ON

E

R-O

UT

G-O

UT

B-O

UT

5 13

IC05

0H

AL

FT

ON

E

3.3V

Q05

3

Q05

4

Q05

5

28 FB

A11 1 2 3

C1 1 2 3

Q35

4 -R

Q35

5 -G

Q35

6 -B

Q35

1 -R

Q35

2 -G

Q35

3 -B

C-B

OA

RD

V ID

EO

IN

V ID

EO

IN4849

51

Q05

0Q

053

Q05

3

OS

DR

R

GB

22 24 72

JK30

01

Y IN

C IN

SS

W

on

ly fo

r CT-

20D

12D

F

- 10 -Parts List

REPLACEMENT PARTS LISTModels: CT-20D12DF, CT-20G7DF

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.

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REF NO. PART NO. DESCRIPTION

CAPACITORS

C001 TCJ2VF1H103Z CAP,C .01UF-Z-50V

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

C003 ECA1HM4R7B CAP,E 4.7UF-50V

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


C037 ECA1HM0R1B CAP,E 0.1UF/50V













C054 TCJ2VF1H103Z CAP,C .01UF-Z-50V CT-20D12DF


C057 ECKR1H471KB5 CAP,C 470PF-K-50V CT-20D12DF

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-25V




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 ECEA1HN010UB CAP,E 1UF/50V


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-16V






C578 ECA0JM332B CAP,E 3300PF-6.3V

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

C580 ECKR2H152KB5 CAP,C .0015UF-K-500V



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

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



C805 EC0S2DA221BB CAP,E 220UF/200V

C806 ECQM4103KZW CAP,P .01UF-K-400V




- 11 -120-02

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Parts List

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 EEANA1E100B CAP,E 10UF-25V

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






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






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



C2350 ECA1HM100B CAP,E 10UF/50V







DIODES

D002 MA165TA5VT DIODE, SWITCHING

D006 MA4330HTA DIODE

D052 MA4068MTA DIODE, ZENER

D053 MA4056MTA DIODE


D451 ERA15-01V3 DIODE, RECTIFIER






D531 AS01V0 DIODE

D551 D1NL20UV70 DIODE

D554 AU02V0 DIODE

D558 RS3FS DIODE

D559 BYD33G-113 DIODE

D561 AU02V0 DIODE



D607 MA152KTX DIODE

D608 MA152KTX DIODE

D609 MA152KTX DIODE

D801 D3SBA60-4103 DIODE

D806 TAP2AA0001 PTC 5-OHM

D808 SARS01V1 DIODE

D809 AG01V0 DIODE

D810 AG01V0 DIODE

D811 AG01V0 DIODE



D821 MA4047HTA DIODE

D822 RN1ZLF-B1 DIODE

D823 S3L60P154004 DIODE

D824 D1NL20UV70 DIODE

D2305 MA3110MTX DIODE, ZENER CT-20D12DF









D3001 MA3110MTX DIODE, ZENER








- 12 -Parts List



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FUSES

F801 XBA2A00101 FUSE 6.3A 125V

INTEGRATED CIRCUITS

IC001 M65580MAP103 MPU/VCJ

IC002 TVR2AJ125 EEPROM

IC003 PIC-37042SR IR RECEIVER

IC005 PQ1X331M2ZP VOLTAGE REGULATOR, 3.3V

IC006 MN1280R RESET

IC050 TC74HC4066AL HALFTONE

IC451 LA7837-TV V-OUT

IC551 AN78L09 INT CKT CT-20D12DF

IC551 AN78M09LB VOLTAGE REGULATOR 9V CT-20G7DF

IC552 AN78M05LB VOLTAGE REGULATOR, 5V

IC553 AN78M05LB VOLTAGE REGULATOR, 5V

IC801 STRG5623A POWER SUPPLY, 360V

IC2201 AN5829S-E1V MTS, S-AGC

IC2301 AN17800A AUDIO AMP CT-20G7DF

IC2301 AN17801A AUDIO AMP CT-20D12DF

IC2302 AN17800A AUDIO AMP CT-20G7DF

IC2302 AN17801A AUDIO AMP CT-20D12DF

COILS

L001 EXCELSA35T FERRITE BEAD

L003 TLUABTA2R2K COIL, PEAKING 2.2UH


L005 EXCELDR35V FERRITE BEAD



L008 TLUABTA470K COIL, PEAKING 47UH

L009 EXCELSA35V FERRITE BEAD

L010 ELESN330JA COIL, PEAKING 33UH

L011 ELESN330JA COIL, PEAKING 33UH


L014 ELESN180KA COIL, PEAKING 18UH

















L551 ELH5L4101 COIL

L801 ELF15N011A COIL, PEAKING

L802 ELEIE680KA COIL, PEAKING 68UH

L803 TALL08T680KA COIL



L2350 ELESN4R7JA COIL, PEAKING 4.7UH

TRANSISTORS

Q001 2SD601ARTX TRANSISTOR

Q006 2SB709ARTX TRANSISTOR



Q009 2SC1473A TRANSISTOR









Q351 2SC3063RL TRANSISTOR









Q501 2SC1573AH TRANSISTOR



Q551 2SC562200VLA TRANSISTOR



Q820 2SA1767QTA TRANSISTOR

Q830 2SB1011QRL TRANSISTOR


RELAYS

RL801 TSEH0005 RELAY

RESISTORS

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

R003 ERJ6GEYJ105V RES,M 1M-J-1/10W

R004 ERJ6GEYJ562V RES,M 5.6K-J-1/10W

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

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







- 13 -120-02

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Parts List
















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











R043 ERJ6GEYJ103V RES,M 10K-J-1/10W CT-20D12DF

R044 ERJ6GEYJ103V RES,M 10K-J-1/10W CT-20G7DF

R044 ERJ6GEYJ332V RES,M 3.3K-J-1/10W CT-20D12DF


















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



R201 ERJ6GEYJ182V RES,M 1.8K-J-1/10W CT-20D12DF



R202 ERJ6GEYJ751V RES,M 750-J-1/10W CT-20G7DF

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



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



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









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




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










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






















- 14 -Parts List



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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


R805 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,M 6.8-J-3W



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






R850 ERQ12HJR56P RES,F .56-J-1/2W






R2301 ERQ2CJP3R9S RES,F 3.9-J-2W






















R3013 ERJ6ENF75R0V RES,M 75.0-F-1/10W CT-20D12DF

R3014 ERJ6ENF75R0V RES,M 75.0-F-1/10W CT-20D12DF





R3050 ERJ6GEYJ101V RES,M 100-J-1/10W CT-20D12DF

R3051 ERJ6GEYJ101V RES,M 100-J-1/10W CT-20D12DF

SWITCHES

S001 EVQPF106K SWITCH







TRANSFORMERS

T501 TLH15452 TRANSFORMER HORIZONTAL DRIVER

T551 KFT3AA341F TRANSFORMER FLYBACK

T801 ETS29AS183NC TRANSFORMER

CRYSTALS/FILTERS

X001 TSSA092 CRYSTAL OSCILLATOR

X002 AF080005BE CRYSTAL OSCILLATOR

OTHERS

TNR001 ENG36604GR TUNER CT-20G7DF

TNR001 ENG36610G TUNER CT-20D12DF

M001 TSX2AA0111-1 LINE CORD (SPT2)

M002 A51KRE89XDT CRT 20”

M003 TXF3A011DB2 ASSY. DAG GROUND

M004 TJSC00300 CRT SOCKET

DY TLY2AA001 DEFLECTION YOKE




- 15 -120-02

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Parts List

M005 JH291U-009 YOKE, CONVERGENCE

M006 0FMK014ZZ CONVERGENCE CORRECTOR STRIP

M007 TMM2A30702 WEDGE, YOKE

DEG TSP2AA008 COIL, DEGAUSSING 20”

M008 TXANV03ESER DEG. COIL INST. KIT

M009 TXFKU05ESER

ASSY, CABINET BACK CT-20G7DF(Cabinet Back, Double Insul. Label,Nameplate Model, Felt, Label X-RayWarning, Label X-Ray Warning French)

M010 TXFKU06ESER

ASSY, CABINET BACK CT-20D12DF(Back Cover, Nameplate Model,Instr.sht.X-Ray Label, Label X-RayWarning French, Label FCC)

M011 TXFKY09FSERASSY, CABINET FRONT(Cabinet Front, Badge Panasonic, GuideIR, Label X-Ray Warning)

M012 TAS2AA0012 SPEAKER 16-OHM 1.5W


M013 TKX2AA00404 GUIDE, IR

M014 TBM2A10141 BADGE, PANASONIC

M015 TBX2AA0121 BUTTON, 7-KEY

JK3001 TJB2A9063B ASSY. JACK 1A/V CT-20D12DF

JK3001 TJB2A9064B ASSY. JACK A/V CT-20G7DF

JK3002 TJB2AA0046 TERMINAL, FRONT A/V

JK3003 TJB2AA0171 TERMINAL, S-VHS CT-20D12DF

ACCESORIES

M016 EUR501450 REMOTE CONTROL CT-20G7DF

M017 EUR511502 REMOTE CONTROL CT-20D12DF

M018 UR50EC1190ABATTERY COVER, REMOTE CONTROL

CT-20G7DF

M019 UR51EC975ABATTERY COVER, REMOTE CONTROL

CT-20D12DF

M020 TQB2AA0431-1 MANUAL, OWNERS CT-20D12DF


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:

- 16 -

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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 areused for engineering designpurposes.

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 altitudes 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 ofthe test equipment will result in erroneousreadings.

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) inTV/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 connectionof the test equipment will result inerroneous 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.

BE

C

CHIP TRANSISTORLEAD DESIGNATION

- 17 -

Notas

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NOTAS DE LOS DIAGRAMAS1. Las Resistencias son de Carbón de 1/4W, a

menos que se indique otra característica.2. Los Capacitores son de Cerámica para

50V, a menos que se indique otracaracterística.

3. El valor indicado de las Bobinas es lainductancia expresada en µH.

4. Los puntos de prueba en la terminal dealgún componente son indicados por Lospuntos de prueba fuera de loscomponentes se indican con .

5. Los componentes señalados con elsímbolo son consideradoscomponentes críticos y deben ser

reemplazados sólo con las partesespecificadas por el fabricante.

6. (LINEA GRUESA ) indica laslíneas de alimentación de los VoltajesB+.

7. Los diagramas eléctricos están sujetos acambio sin previo aviso.

8. El símbolo indica que es unaconexión a Tierra Caliente y el símbolo

indica conexión a Tierra Fría .

NOTA: Los demas símbolos decomponentes incluidos sonusados con fines de diseño.

MEDICIÓN DE VOLTAJES1. Medición de voltaje:

- El voltaje de entrada al Receptor es de120V de Corriente Alterna. Ungenerador de patrones con formatoNTSC se conecta a la entrada de laantena. (Patrón de Barras de Colorescon 100 IREs para el Blanco y 7.5 IREspara el Negro.)

- Los ajustes de los Menus Picture yAudio se normalizan.En el Menú Set-Up, en la opciónANTENA, se selecciona el modo deCABLE.El nivel de Volumen se minimiza.De los modos TV y Video, seleccionar elmodo TV.Seleccionar modo Estereo del Audio.

- Las mediciones de los voltajes sonnominales y pueden variar hasta10% en componentes enfuncionamiento. Las lecturas de losvoltajes pueden variar por lapotencia de la señal y el contenidode la imagen.

- Las fuentes de voltajes sonnominales.

2. El símbolo indica el tipo de tierra quese utiliza en la conexión del medidor.

PRECAUCION: SI no se utiliza laconexión a la tierra adecuada, seobtendrán mediciones equivocadas ypodría dañar el equipo de medición.

MEDICIÓN DE FORMAS DE ONDA

1. Un símbolo como indica el punto para mediruna señal. (La medición puede hacerse enel punto con mayor accesibilidad, siempreque sea común al indicado.)

2. Se midieron utilizando un generador conformato NTSC conectado a la terminal de laantena. (Patrón de 8 Barras de ColoresEAI, formato NTSC de 100 IREs para elBlanco y 7.5 IREs para el Negro.)

3. Los ajustes de usuario de los MenusPICTURE y AUDIO se normalizaron.Posteriormente el nivel de volumen seajusta al mínimo.

4. Las formas de onda de Video y Colorfueron tomadas con un osciloscopio de

banda alta y con un punta de prueba debaja capacitancia (10 a 1). La forma yamplitud de las ondas puede variarsegún el tipo de osciloscopio que seutilice y sus características.

5. El símbolo de tierra que aparece junto alnúmero de la forma de onda, indica quese utiliza conexión a Tierra Caliente enel extremo negativo de la punta deprueba.

PRECAUCION: Si no se utiliza la conexióna la tierra adecuada, se obtendránmediciones equivocadas y podría dañar elequipo de medición.

3

NOTA DE SEGURIDADLOS DIAGRAMAS ELÉCTRICOS INCLUYENCARACTERÍSTICAS ESPECIALES MUY IMPORTANTESPARA LA PROTECCIÓN CONTRA RAYOS-X,QUEMADURAS Y DESCARGAS ELÉCTRICAS. CUANDOSE DE SERVICIO ES IMPORTANTE USAR PARAREEMPLAZO DE COMPONENTES CRITICOS, SOLOPARTES ESPECIFICADAS POR EL FABRICANTES. LOSCOMPONENTES CRITICOS ESTAN SEÑALADOS EN LOSDIAGRAMAS POR EL SIMBOLO .

BE

C

IDENTIFICACIÓN DE TERMINALESPARA TRANSISTORES EN CHIP

- 18 -A&C-Board Layout

- 19 - A&C-Board Layout

- 20 -A-Board CT-20G7DF

- 21 - A-Board CT-20G7DF


- 23 - A-Board CT-20G7DF


- 24 -A-Board CT-20D12DF

- 25 - A-Board CT-20D12DF


- 27 - A-Board CT-20D12DF


- 29 -

Q351

7.4796.00

7.00

Q352

7.4098.20

6.90

BCE

Q354

2.907.502.40

Q355

2.907.402.40

BCE

Q353

7.4098.80

6.90

Q356

2.907.402.40

C-Board transistor voltages

C-Board schematic

C-Board schematic & transistor voltages

- 30 -

A-Board Waveforms (All Models -- Todos los Modelos)

1.3V p-p [20µs]TPA5 (VIDEO)

1 1.40V p-p [20µs](B OUT)

A11-3

5 28V p-p [5ms]

IC451-13 (PUMP-UP)9 112V p-p [5ms]

Q551-Collector H Out13

IC001 PIN 35A/D C OSC

2

14.20MHz Xtal

9.20V p-p [20µs]V IN

IC451-2

6 5.52V p-p [5ms]IC001-44 (H PULSE)

10 14 276V p-p [20µs]IC801-1

1.68V p-p [20µs]A11-1 (R OUT)

3 1.32V p-p [20µs]V DRIVEIC451-7

7 3.12V p-p [5ms]

IC001-43 (FBT PULSE)11 2.90V p-p [20µs]

IC801-515

4 1.44V p-p [20µs]A11-2 (G OUT)

48V p-p [20µs]IC451-12 V OUT

8 164V p-p [5ms]Q501-Collector H Drive

12

Q006

2.59GND3.24

Q007

2.68GND3.33

BCE

Q001

0.0011.00GND

Q008

2.65GND3.31

Q053

0.005.002.59

Q051

4.97GND2.69

BCE

BCE

Q050

4.98GND2.59

Q054

0.005.012.68

Q092

8.922.374.99

Q451

0.600.00GND

Q520

1.764.981.60

Q551

0.00-25.30

GND

Q453

0.008.66GND

Q505

2.464.982.32

Q090

1.310.002.04

Q501

0.3685.20

0.00

Q055

0.005.012.65

Q005

Q052

4.98GND2.67

Q452

0.002.49GND

Q009

0.590.00GND

Q606

0.003.68GND

Q820

130.300.00

130.70

Q605

4.050.004.01

Q830

129.80127.78130.40

BCE

Q2350

5.22GND2.70

A-Board transistor voltages

A-Board waveforms & voltages

- 31 -

IC001

123456789

10111213141516171819202122232425262728293031323334353637383940

. . . . . 0.00

. . . . . 1.39

. . . . . 4.98

. . . . . 4.91

. . . . . 2.47

. . . . . 4.95*

. . . . . 2.43

. . . . . 4.99

. . . . . 2.36

. . . . . 2.90

. . . . . 4.95

. . . . . GND

. . . . . 2.47

. . . . . 4.97

. . . . . n.c

. . . . . 4.98*

. . . . . 2.93

. . . . . 1.35

. . . . . 3.21

. . . . . 0.52

. . . . . GND

. . . . . 0.62

. . . . . 1.69

. . . . . 1.09

. . . . . 0.45

. . . . . 0.95

. . . . . 2.06

. . . . . 2.59

. . . . . 3.26

. . . . . 2.69

. . . . . GND

. . . . . 2.67

. . . . . 4.98

. . . . . 2.85

. . . . . 2.68

. . . . . 2.37

. . . . . 2.41

. . . . . 3.51

. . . . . n.c

. . . . . 2.49

41424344454647484950515253545556575859606162636465666768697071727374757677787980

. . . . . .GND

. . . . . . 4.97

. . . . . . 2.32

. . . . . . 1.76

. . . . . . 4.46

. . . . . . 4.20

. . . . . . 0.00

. . . . . . 4.97

. . . . . . 4.96

. . . . . . 0.00

. . . . . . 4.97

. . . . . . 0.17

. . . . . .n.c

. . . . . . 0.17

. . . . . . 4.97

. . . . . . 0.00

. . . . . . 4.97

. . . . . . 4.97

. . . . . . 0.00

. . . . . . 4.16

. . . . . . 0.00

. . . . . . 4.45

. . . . . . 0.00

. . . . . . 0.39

. . . . . .n.c

. . . . . . 0.00

. . . . . . 0.00

. . . . . . 1.94

. . . . . . 4.98

. . . . . . 4.98

. . . . . . 4.97

. . . . . . 4.98

. . . . . . 0.00

. . . . . . 4.96

. . . . . . 1.95

. . . . . . 0.18

. . . . . . 2.16

. . . . . . 0.00

. . . . . . 2.28

. . . . . . 2.40

IC002

12345678

. . . . . GND

. . . . . GND

. . . . . GND

. . . . . GND

. . . . . .4.40

. . . . . .4.16

. . . . . GND

. . . . . .4.99

IC050

123456789

1011121314

. . . . . . 2.59

. . . . . . 3.20

. . . . . . 3.21

. . . . . . 2.69

. . . . . . 0.00

. . . . . . 0.00

. . . . . GND

. . . . . . 2.67

. . . . . . 3.21

. . . . . n.c

. . . . . n.c

. . . . . n.c

. . . . . . 0.00

. . . . . . 4.99

IC005

123456

. . . . . .5.01

. . . . . GND

. . . . . .1.32

. . . . . .3.26

. . . . . GND

. . . . . .5.01

IC006

123

. . . . . .5.00*

. . . . . .4.98

. . . . . GND

IC003

123

. . . . . .4.96

. . . . . GND

. . . . . .4.98

IC451

123456789

10111213

. . . . . 8.18

. . . . . 8.66

. . . . . 4.10

. . . . . 4.15

. . . . . GND

. . . . . 3.92

. . . . . 3.99

. . . . 24.32

. . . . . 1.79

. . . . . 1.32

. . . . . GND

. . . . 14.01

. . . . 24.67

IC801

12345

. . . 193.00

. . . . . GND

. . . . . GND

. . . . 32.80

. . . . . 2.81

IC2201

123456789

101112

. . . . . 1.16

. . . . . 2.17

. . . . . 2.16

. . . . . 2.23

. . . . . 2.17

. . . . . 0.43

. . . . . 4.91

. . . . . 2.42

. . . . . 2.47

. . . . . 0.51

. . . . . 2.26

. . . . . 0.00

131415161718192021222324

. . . . . 3.34

. . . . . 2.16

. . . . . 3.29

. . . . . 3.45

. . . . . GND

. . . . . 4.97

. . . . . 0.20

. . . . . n.c

. . . . . 2.24

. . . . . 2.20

. . . . . n.c

. . . . . n.c

IC551

123

. . . . 12.00

. . . . . GND

. . . . . 8.95

IC552

123

. . . . 12.01

. . . . . GND

. . . . . 5.00

IC553

123

. . . . . 8.96

. . . . . GND

. . . . . 4.99

IC2301

123456789

101112

. . . . .14.00

. . . . . .0.00

. . . . .13.70

. . . . . .0.00

. . . . . .9.90

. . . . . .2.71

. . . . .16.81

. . . . . GND

. . . . . .4.98

. . . . . .8.80

. . . . . .3.41

. . . . .18.81

IC2302

123456789

101112

. . . . .13.58

. . . . . .0.00

. . . . .13.62

. . . . . .0.00

. . . . . .9.88

. . . . . .2.69

. . . . .16.65

. . . . . GND

. . . . . .4.97

. . . . . .8.80

. . . . . .3.55

. . . . .18.73

A-Board integrated circuit voltages

A-Board IC voltages

Printed in USAK02052597PL0516

®

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