panasonic tx28ex4f tx25ex4f eu4

5/27/2018 Panasonic Tx28ex4f Tx25ex4f Eu4

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Service Support

Service and repair ofthis product issupported byPanasonic's LUCIinterface.

This interface provides alink between the TV anda standard PC to allow anumber of diagnosticand control functions tobe performed.

For more details contactyour local Panasoniccompany.

BACK EXIT

TX-28/25EX4F Service Manual

Safety

SpecificationsBlock Diagrams

Schematic Diagrams

PCB Views

Self Check

ServiceInformation

Parts List

Service Hints

Disassembly

Location ofControls

Waveforms

MechanicalView

Adjustments
http://close/http://quit/http://quit/http://close/


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BACK

BACK

BACK

E - Schematic

N - Schematic

H - Schematic

Y - Schematic

E - PCB Y - PCB

Audio

Power supply

Control

Video


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Colour Television

TX-28EX4F

TX-25EX4F

EURO4 Chassis

SPECIFICATIONS(Information in brackets { } refers to model TX-25EX4F)Power Source: 220-240V AC, 50Hz

Power Consumption: 85W

Aerial Impedance: 75unbalanced, Coaxial Type

Stand-by PowerConsumption: 1,8W

Receiving System: PAL I,B/G, H, D/K, PAL 525/60SECAM L/L, B/G, D/KM.NTSCNTSC (AV only)

Receiving Channels:VHF E2-E12 VHF H1-H2 (ITALY)VHF A-H (ITALY) VHF R1-R2VHF R3-R5 VHF R6-R12UHF E21-E69 CATV (S01-S05)CATV S1-S10 (M1-M10) CATV S11-S20 (U1-U10)CATV S21-S41 (HYPERBAND)

Intermediate Frequency:Video 38,9MHz 34MHzAudio 32,9MHz, 33,4MHz, 33,16MHz

32,4MHz, 40,4MHz, 33,05MHz32,66MHz

Colour 34,47MHz (PAL)

AV2 OUT Video (21 pin) 1V p-p 75

Audio (21 pin) 500mV rms 1k

Selectable Output (21 pin)AV3 IN Audio (RCAx2) 500mV rms10k

Video (RCAx1) 1V p-p 75

High Voltage: 28,5kV 1kV {28,2kV 1kV}

Picture Tube: A66ECF50X41 66cm{A59ECF50X41 59cm}

Audio Output: 2 x 15W (Music Power)8Impedance

Headphones: 8Impedance3,5 mm

Accessoriessupplied : Remote Control

2 x R6 (UM3) Batteries

Dimensions:Height: 596,5 mm {550,5 mm}Width: 778 mm {730 mm}Depth: 479 mm {478,5 mm}

Net weight: 32kg {27kg}

Specifications are subject to change without notice.Weights and dimensions shown are approximate.

NOTE: This Service Manual should be used in conjunction withthe EURO4 Technical Guide.

ORDER No. SM-98022


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CONTENTSSAFETY PRECAUTIONS..........................................................................................................................................................2

SERVICE HINTS.......................................................................................................................................................................3

ADJUSTMENT PROCEDURE...................................................................................................................................................4

ADJUSTMENT PROCEDURE AND SELF-CHECK ............................................................................................ ......................5

WAVEFORM PATTERN TABLE ............................................................ .................................................................... ...............6

ALIGNMENT SETTINGS...........................................................................................................................................................7

BLOCK DIAGRAMS.......................................................... ..................................................................... ...................................8

PARTS LOCATION ............................................................ .................................................................... .................................12

REPLACEMENT PARTS LIST ......................................................... .......................................................................... .............13

SCHEMATIC DIAGRAMS ............................................................ .............................................................................. .............22

CONDUCTOR VIEWS.............................................................................................................................................................26

SAFETY PRECAUTIONS

GENERAL GUIDE LINES1. It is advisable to insert an isolation transformer in the

AC supply before servicing a hot chassis.2. When servicing, observe the original lead dress in the

high voltage circuits. If a short circuit is found, replace

all parts that have been overheated or damaged bythe short circuit.

3. After servicing, see that all the protective devicessuch as insulation barriers, insulation papers, shieldsand isolation R-C combinations are correctlyinstalled.

4. When the receiver is not being used for a long periodof time, unplug the power cord from the AC outlet.

5. Potentials as high as 29,5kV {29,2kV} are presentwhen this receiver is in operation. Operation of the

receiver without the rear cover involves the danger ofa shock hazard from the receiver power supply.Servicing should not be attempted by anyone who isnot familiar with the precautions necessary whenworking on high voltage equipment. Alwaysdischarge the anode of the tube.

6. After servicing make the following leakage currentchecks to prevent the customer from being exposedto shock hazard.

LEAKAGE CURRENT COLD CHECK

1. Unplug the AC cord and connect a jumper betweenthe two prongs of the plug.

2. Turn on the receivers power switch.3. Measure the resistance value with an ohmmeter,

between the jumpered AC plug and each exposedmetallic cabinet part on the receiver, such as screwheads, aerials, connectors, control shafts etc. Whenthe exposed metallic part has a return path to the

6. The potential at any point should not exceed1.4 Vrms. In case a measurement is outside the limitsspecified, there is a possibility of a shock hazard, andthe receiver should be repaired and rechecked before

it is returned to the customer.

X-RADIATION WARNING

1. The potential sources of X-Radiation in TV sets arethe high voltage section and the picture tube.

2. When using a picture tube test jig for service, ensurethat the jig is capable of handling 29,5kV withoutcausing X-Radiation.

NOTE: It is important to use an accurate periodicallylib t d hi h lt t

HOT CHECK CIRCUIT

A.C. VOLTMETER

WATER PIPE(EARTH)

TO INSTRUMENTS EXPOSEDMETALLIC PARTS

Fig. 1.

2k10 Watts


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SERVICE HINTSHow to remove the rear cover1. Remove the 12 screws as shown in Fig.2.

LOCATION OF CONTROLS

SCREWSFig.2.


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ADJUSTMENT PROCEDURE

The remote control is used for entering and storing adjustments, with the exception of Cut-off adjustments, which mustalways be done prior to service adjustment. Perform adjustments in accordance with screen display. The display on thescreen also specifies the software version as well as the approx. setting values. The adjustment sequence for the service

mode is indicated below.1. Set the Bass to maximum position, set the Treble to

minimum position, press the F button fol lowed by thevolume down button on the customer controls at thefront of the TV and at the same time press the"INDEX" button on the remote control, this will placethe TV into the Service Mode.

2. Press the RED/ GREENbuttons to step up / downthrough the functions.

3. Press the YELLOW/ BLUEbuttons to alter thefunction values.

4. Press the STRbutton after each adjustment hasbeen made to store the required values.

5. To exit the Service Mode, press the "N"button.

NOTE:This TV also has the option of using a Memory Pack which enables you to copy the preset TV channels into the

Memory Pack and then download them onto this or any other EURO-4 TV set.

TV to Memory Pack process

1. Plug the memory pack into the AV1 21 pin terminal atthe back of the TV and switch the TV on.

2. Go into Service Mode as explained above.The screen will show :-

3. Press the BLUEbutton on the remote control.The screen will show :-

4. Press the STRbutton on the TV.

The screen will show :-

5. All the tuning information stored inside the TV willnow be transferred to the Memory Pack. This processwill take 2-3 minutes to complete and when finishedthe screen will show :-

Memory Pack to TV process

1. Plug the memory pack into the AV1 21 pin terminal atthe back of the TV and switch the TV on.

2. Go into Service Mode as explained above.The screen will show :-

3. Press the STRbutton on the TV.The screen will show :-

4. All the tuning information stored inside the Memory

Pack will now be transferred to the TV. This processwill take 2-3 minutes to complete and when finishedthe screen will show :-

5. The tuning information from the Memory Pack hasnow been copied into the TV.

6. To exit from the Service Mode press the "N"button.7. The process has now been completed and the

Memory Pack can now be removed.

ERRORS

ProgramExternal>>TV

ProgramTV>>External

Please Wait

Complete

ProgramExternal>>TV

Please Wait

Complete


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ADJUSTMENT PROCEDUREItem / Preparation Adjustments+B SET-UP1. Receive a Greyscale signal.2. Set the controls :-

Brightness Minimum

Contrast Minimum

Volume Minimum

1. Set the +B voltage up as follows:-Adjust R811so that B2shows 148V1V.

2. Confirm the following voltages.

B9 5 0,25V B10 5 0,25VB5 12 0,5V B11 33 1,5VB4 16 1V B7 8 0,5VB12 26 1V B8 5,5 0,5VB3 35 1,5V B13 15 1VB1 200 10V B14 -15 1V

CUT OFF / Ug2 Test1. Receive a Greyscale signal.2. Degauss the tube externally.3. Set the TV into Service Mode 1.4. Select Cut off mode.

To adjust Cutoff connect an oscilloscope to the Bluecathode, adjust "cutoff" value using the "Yellow" and "Blue"buttons until the black level is 160V5V press "STR" to store

the value. Remove the oscilloscope.Select Ug2 adjustment and adjust the screen VR until thedisplay shows "O.K."

SELF CHECKSelf-check is used to automatically check the bus lines and hexadecimal code of the TV set. To get into the Self-Check modepress the down (-/v)button on the customer controls at the front of the set, at the same time pressing the STATUSbutton onthe remote control, and the screen will show :-

If the CCU ports have been checked and found to be incorrect or not located then " - - " will appear in place of "O.K.".

Service Aids

VDP O.K.

TUN O.K.

E2 O.K.

MSP O.K.

DPL - -

PCB O.K.

Cab O.K.

Sum Factory use only

OPTION 1 39

OPTION 2 0C

OPTION 3 1F

OPTION 4 00

OPTION 5 EF

OPTION 6 25


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WAVEFORM PATTERN TABLE

Video OutIC601 Pin 59

2V

64S

B - OutE8 Pin 4

64S

2V

H - Pulse

Base Q503

VFLBIC451 Pin 3

1V

20mS

B - OutIC601 Pin 39

275mV

64S

64S

3V

H - OutIC601 Pin 50

Vert OutIC601 Pin 31

20mS

0.7

V

R - OutE8 Pin 5

6V

HFLBIC601 Pin 13

64S

6.2

V

R - OutIC601 Pin 37

64S

275mV

G - OutIC601 Pin 38

275mV

64S

Vert DriveIC451 Pin 2

20mS

57V

HFLBIC701 Pin 8

64S

1.5

V

G - OutE8 Pin 3

H - OutIC701 Pin 5

30mV

64S


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ALIGNMENT SETTINGS(The figures below are nominal and used for representative purposes only.)

Alignment Function Settings / Special features

Horizontal PositionH-Pos061

Optimum setting.

Vertical PositionV-Pos005

Optimum setting.

Horizontal AmplitudeH-Amp

055Optimum setting.

Vert. AmplitudeV-Amp

054Optimum setting.

EW-amplitudeE/W-Amp1

-128Optimum setting.

EW-amplitudeE/W-Amp2

006Optimum setting.

Trapezium-compTrapez-1

047Optimum setting.

Trapezium-compTrapez-2

-128Optimum setting.

Vertical LinearityV-Lin

006

Optimum setting.

Vertical SymmetryV-Sym

002Optimum setting.

DVCODVCO-005

Receive a PAL Colour Bar Pattern. ForDVCO alignment press "Blue"button, waituntil the colours are changing slowly andpress "STR".

Cut-off DC Cut-off0171

Ug2 TestUg2055

To adjust Cutoff connect an oscilloscope to

the blue cathode, adjust "cutoff" valueusing the "Yellow" and "Blue" buttons untilthe black level is 160V5V press "STR" tostore the value. Remove the oscilloscope.Select Ug2 adjustment and adjust thescreen VR until the display shows "O.K."


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VIDEO BLOCK DIAGRAM

Q105

AV1

IC601

AV2

AV3

Q3601

IC1101

R 37 68

CVBS

61 V IN 1

43 B IN

42 G IN

41 R IN

62 VIN 2

60 C IN

63 VIN 3

VIN 464

VIDEO OUT 59

B IN 47

B OUT 39 Q305

Q303

Q301

E8

4

3

5

Y2

4

3

5

TUNER Q104

G OUT 38

R OUT 37

G IN 46

R IN 45

Q306

Q304

Q302

Q

7 7

SVM OUT 34

Q950 Q951

Q3001

G 38

B 39

Y -E - BOARD

VIDEOPROCESSOR

MICROPROCESSOR

H3E61

E15

1

6

8

H1

1

6

8

H -

8


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AUDIO BLOCK DIAGRAM

TUNER

Q101

Q102

IC2101IC251

Q2102

Q2103

DACM_R 24

SC3_IN_L 37

SC1_OUT_R 30

SC1_OUT_L 31

5 R R 7

47 ANA_IN1+

44 MONO IN

DACM_L 25

SC3_IN_R 38

SC1_IN_R 42

SC1_IN_L 41

SC2_OUT_R 27

SC2_OUT_L 28

SC2_IN_R 40

SC2_IN_L 39

Q252

Q251

2 L L 11

Q2304

Q2302

21 DACA_R

22 DACA_L

E - BOARD

AUDIOPROCESSOR

AUDIOOUTPUT

AUDIOMONITOR

OUT

Q2303

Q2301

Q103

49 ANA_IN2+

X101

X102

9


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CONTROL BLOCK DIAGRAM

N1

4

E19

4

H3

3

E63

1IC2101

IC1101

TUNER

IC601

50

SCL 2

SDA 2

4

3

SDA 1

SCL 1

SCL SDA

48 49

8

7

45

IC3401

Q451 71LOCALKEYS

SWITCHMATRIX

60

Q854 52Q853

74

IC1071

Q1052 81

Q856 75Q851

Q1106

Q1105 Q1107Q1104

51

72

73

59

5855

VPROT

KEYSCAN

ON/OFF

R.C.

L.E.D.

PROT 1

SLOW 2

OUT

IN

SLOW1

SERVICE

SCL

SDA

H - BOARD

E - BOARD

VIDEOSWITCHING

AUDIO

PROCESSOR

MICROPROCESSOR

VIDEOPROCESSOR

REMOTE

CONTROLRECEIVER

Q1051

N - BOARD

8 8D1071

10

L/L

L/L

POS/NEG

8283

POS/NEG

Q3401


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POWER SUPPLY BLOCK DIAGRAM

11

D868

+

~

~

IC801

T801

IC251

D850

TUNER

Q850

T551

IC851

IC853

IC4

D454

IC701

Q853

IC1104IC1101

IC1102IC1103 IC1105 IC2

T802 RL801

IC1071

5V SBY

5V SBY

5V

5V

8V

2

2 43 66

1 31 32 8 2

3

4

2

1

3

1

S4B1

P2

P1

S5

S2

S7

10

9

6

8

5

6

2

6

3

1

12V

200V33V

-14V

14V

27V

150V

29V

7V

15V

5V

D867

Q852

Q854

Q855

1

D805

R805

R814

IC850

12

D862R854

33V

REMOTECONTROLRECEIVER

N - BOARD

RESET

MICROPROCESSOR AU

PROCEPROM EAROM RESET

REG

REG

REG

EW

CORRECTION

POWERSUPPLY

V-OUT

AUDIOOUTPUT

D801

E - BOARD

N12

E192

E14

1

E2

2

1

R802DEGAUSS

COIL

LineFilter

IC852

REG1

9V

3


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PARTS LOCATION

NOTE:The numbers on the exploded view belowrefer to the mechanical section of theReplacement Parts List.

19

20

16

12

14

15

11

3

18

13

6

17

9

2


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Components Identified by mark have special characteristics important for safety.

* When replacing any of these components, use only manufacturers specified parts.In case of ordering these spare parts, please always add the complete Model-Typenumber to your order.

REPLACEMENT PARTS LIST

Important Safety Notice

DescriptionCct Ref Parts Number DescriptionCct Ref Parts Number

COMMON PARTS

MECHANICAL PARTS

SPEAKER1 EASG15S505A2

TUNER2 ENG29504G

REMOTE CONTROL3 EUR511200

PANASONIC BADGE4 TBM8E1728

POWER BUTTON5 TBX8E061

REAR AV COVER6 TKP8E1222

DOOR LID7 TKP8E1256

CHASSIS FRAME8 TMX8E020

H P.C.B.9 TNP8EH002AA

N P.C.B.10 TNP8EN016AD

BATTERY COVER (REMOTE) 11 UR51EC904A

CRT FIXING SCREW12 VP17005-32

MISCELLANEOUS COMPONENTSFIX CLIP31221212478

I.C. SOCKET832AG11D-ESL

RELAYF9-4-220

84 PIN SOCKETPCS-084A-1

PRESET LABELTBM8E1615

REAR AV LABELTBM8E1781

LID CATCH TEK6940

POWER BUTTON SPRING TES8E015

LED HOLDERTMW8E027

BATTERY PACKUM-3DJ-2PANODE LEADZTUZAE550A

RELAYRL801 TSE1885-1

THERMISTORR802 232266296706

CRT SOCKETS351 0330550049

INSTRUCTION BOOKS

SPANISHTQB8E2579E

DIODEIC1104 MN1381-R(TA)

DIODEIC1105 MN1381-T(TA)

AUDIO PROCESSORIC2101 MSP3410DPOB4

AV SWITCHINGIC3401 TEA2114

FUSES

FUSEF802 19181-3.15

FUSE HOLDERF8021 EYF52BC

FUSE HOLDERF8022 EYF52BC

DIODES

DIODED101 MA3020TX

DIODED102 MA3020TX

DIODED251 MA2180TP

DIODED253 MA700TA5

DIODED254 MA700TA5

DIODED354 1SR124-4AT82



DIODED357 MA165TA5

DIODED358 MA165TA5

DIODED359 MA165TA5

DIODED360 MTZJT-7715A

DIODED361 MA165TA5

DIODED362 MA165TA5

DIODED363 MA165TA5

DIODED364 MA165TA5

DIODED453 MA165TA5

DIODED454 ERA15-02V3

DIODED456 MTZJT-775.6C

DIODED457 MA165TA5

DIODED501 MA165TA5


DIODED511 MA4047

DIODED551 ERD07-15L7

DIODED552 RU3LFA1



DIODED556 MA165TA5


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PHOTO COUPLERD805 TLP621GR-LF2


DIODED850 RU4BLF-L1DIODED851 MTZJT776.2B

DIODED852 MA165TA5

DIODED853 MA2180BLFS

DIODED854 TVSRU2AMLFA5

DIODED855 FML22SLF610

DIODED856 RU4AMLF-M1


DIODED858 MA165TA5

DIODED859 MA165TA5

DIODED860 MA165TA5DIODED861 MA165TA5

DIODED862 MTZJT-7736A

DIODED863 MA165TA5

DIODED864 MA165TA5

DIODED865 MA165TA5

DIODED866 MA165TA5

DIODED867 EK06-V0

DIODED868 1N4150T-77

DIODED869 1N4150T-77

DIODED870 MA165TA5DIODED871 1N4150T-77



DIODED875 BZX79A75A26A

DIODED901 MA165TA5

DIODED902 MA165TA5

DIODED904 MA165TA5

DIODED905 MA165TA5

DIODED906 RLS72TE-11

LEDD1071 SLR56UR3FSDIODED1072 MTZJT-778.2C

DIODED1101 MA165TA5

DIODED1102 MA165TA5

DIODED2101 MA723TA5

DIODED2102 MA723TA5

DIODED2103 MA723TA5

DIODED2104 MA723TA5


DIODED2303 MA723TA5

DIODED2304 MA723TA5DIODED3101 MTZJT-778.2C


TRANSISTORS

TRANSISTORQ101 BC847B



TRANSISTORQ503 2SD2398-M2

TRANSISTORQ551 BU2508AXLB

TRANSISTORQ552 2SC1473-RN


TRANSISTORQ850 2SD1273PLBTRANSISTORQ851 BC857B

TRANSISTORQ852 2SC1383-S





TRANSISTORQ857 2SA1018QTA



TRANSISTORQ907 BC857BTRANSISTORQ908 2SA1535ARLB

TRANSISTORQ909 2SC3944ARLB


TRANSISTORQ951 FMY4T148






TRANSISTORQ1106 BC847BTRANSISTORQ1107 BC847B









TRANSISTORQ3001 BC847BTRANSISTORQ3006 BC847B





TRANSFORMERS

TRANSFORMERT501 ETH19Y173AY

F.B.T.T551 ZTFL94002A

TRANSFORMERT801 ETS39AG1J7AD

TRANSFORMERT802 ETP35KAN619U

COILS

COILJ208 EXCELSA35V

COILL101 TLT100K991R

COILL102 TLT068K991R

COILL103 EXCELSA35T

COILL104 ELESN4R7KA


17/30


18/30


19/30


20/30


21/30


FILMC511 ECQM2683JZ 250V 68nF

FILMC552 ECWH15H102J 1500V 1nF

FILMC554 ECWF2H514J 500V 1nF

FILMC555 ECWH15H103J 1500V 10nF

FILMC556 ECQM4333JC 400V 33nF

CERAMICC557 ECKC2H471J 500V 470pF

ELECTC558 ECA1HHG471E 50V 470F

FILMC559 ECWF2H684J 500V 470F

ELECTC560 ECA2GHG2R2B 400V 470F

ELECTC561 ECA1EHG102B 25V 470F


ELECTC563 ECA2EHG220B 250V 20F

ELECTC564 ECEA2AU2R2 100V 20F

FILMC565 ECQP1H273J 100V 20F


ELECTC567 ECA1EHG102B 25V 470pF


CERAMICC569 ECKC2H102J 500V 1nF

S.M. CAPC601 ECUV1H104KBX 50V 1nF

ELECTC602 ECA1HM101GB 50V 100F

S.M. CAPC603 ECUV1H102JCX 50V 1nF

S.M. CAPC604 ECUV1H223ZFX 50V 22nF


ELECTC606 ECA1HM3R3GB 50V 3.3F

ELECTC607 ECJ2VF1H104Z 350V100nF







S.M. CAPC614 ECUV1H050CCX 50V 50pF


ELECTC616 ECA1CM100GB 16V 10F

S.M. CAPC617 ECUV1H223KBX 50V22nF


ELECTC619 ECJ2VB1H473K 350V 47nF


ELECTC621 ECJ2VB1C104K 350V 100nF



ELECTC624 ECJ3VB1C474K 3.5KV 470nF



ELECTC627 ECJ3VB1C474K 3.5KV 470nFELECTC628 ECA1CM100GB 16V 10F

S.M. CAPC629 ECUV1H104KBX 50V 10F

CERAMICC630 ECCR1H100J 50V 10F


S.M. CAPC632 ECUV1H270JCX 50V 27pF


270 F

CERAMICC809 ECKC2H472J 500V 4.7nF


ELECTC811 ECOS2GG181NG 400V 180F

CERAMICC814 ECKC3D102J 2KV 1nF


ELECTC816 ECA1EM101GB 25V 100F

FILMC817 ECQE6104K 600V 100nF

CERAMICC818 ECKWNA332MEC 250V 3.3nF

FILMC819 ECQB1H152K 50V 1.5nF

CERAMICC850 ECKC3D471JB 2KV 470pF

ELECTC851 ECA2CM221E 160V 220F

ELECTC852 ECA2CHG101E 160V 100F




ELECTC856 ECA1AHG222B 10V 470pF


ELECTC858 ECEA1HGE102 50V 470pF

ELECTC859 ECJ2VF1H104Z 350V 100nF






ELECTC866 ECJ2VF1H104Z 350V100nF





ELECTC871 ECA1CM102B 16V 470F



ELECTC875 ECA2CM4R7B 160V 10F

ELECTC876 ECA1AHG471E 10V 470pF

ELECTC902 ECA1VM101GB 35V100F

S.M. CAPC903 ECUV1H472KBX 50V 4.7nF


S.M. CAPC906 ECUV1H471KBX 50V 470pF





ELECTC912 ECEA2CU100 160V 10F


ELECTC914 ECA1HM101GB 50V 100FELECTC916 ECEA2CGE100 160V 10F

ELECTC950 ECJ2VB1C104K 350V 100nF





100 F


22/30




















ELECTC2113 ECA1HM3R3GB 50V 3.3F






S.M. CAPC2119 ECUV1H221JCX 50V220pF





S.M. CAPC2124 ECUV1H070DTX 50V 70pF


S.M. CAPC2126 ECUV1H070DTX 50V 70pF



ELECTC2129 ECA1CM102B 16V1pF

ELECTC2130 ECA1CM331B 16V 330F









ELECTC2140 ECA1HM101GB 50V 100FS.M. CAPC2141 ECUV1H152JCX 50V 1.5pF

S.M. CAPC2301 ECUV1H222JCX 50V 2.2nF





2 2 F
























FILMC3401 ECQM1H224J 50V 220nF

S.M. CAPC3402 ECUV1H101JCX 50V100pF


FILMC3404 ECQM1H224J 50V 220nF






S.M. CAPJSE28 ECUV1H104KBX 50V 100F

TERMINALS AND LINKS

RCA / HEADPHONE JACKJK2301 JPJ841101320A.V. TERMINALJK3101 TJB16673

SWITCHES

SWITCHS801 ESB92S11B

SWITCHS1201 EVQ23405R





DIFFERENCES FOR MODEL TX-25EX4F

MECHANICAL PARTS

BACK COVER13 TKU8E00311-1

C.R.T.14 A59ECF50X41

CABINET15 TKY8E215


23/30


CARBONR359 ERDS1TJ114 0.5W 5% 110K

CAPACITORS

CERAMICC551 ECKC3D152J 2KV 1.5nF

DIFFERENCES FOR MODEL TX-28EX4F

MECHANICAL PARTS

BACK COVER13 TKU8E00321-1

C.R.T.14 A66ECF50X41

CABINET15 TKY8E305

DEGAUSS COIL16 TLK8E05140

E P.C.B.17 TNP8EE009AF

MODEL LABEL18 TQF8E2682

POWER CORD19 TSX8E0027

Y P.C.B.20 TNP8EY012AF

MISCELLANEOUS COMPONENTS

OUTER CARTONTPC8E4659

TOP CUSHIONTPD8E655

BOTTOM CUSHIONTPD8E656

I.C.s

EAROM *IC1103 XGL2-03AF

RESISTORS

CARBONR357 ERDS1TJ104 0.5W 5% 100KCARBONR358 ERDS1TJ104 0.5W 5% 100K

CARBONR359 ERDS1TJ104 0.5W 5% 100K

CAPACITORS

CERAMICC551 ECKC3D122J 2KV 1.2nF


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SCHEMATIC DIAGRAMS FOR MODELS

TX-28EX4F / TX-25EX4F

(EURO-4 CHASSIS)

NOTE1. RESISTORAll resistors are carbon W resistor, unless marked otherwise.Unit of resistance is OHM () (k=1,000, M=1,000,000)

2. CAPACITORSAll capacitors are ceramic 50V unless marked otherwise.Unit of capacitance is F unless otherwise stated.

3. COILUnit of inductance is H, unless otherwise stated.

4. TEST POINTTest Point Position

5. EARTH SYMBOL

Chassis Earth (Cold)

Line Earth (Hot)

6. VOLTAGE MEASUREMENTVoltage is measured by a DC voltmeter.Measurement conditions are as follows:Power source AC 220V-240V, 50HzReceiving Signal Colour Bar signal (RF)All customer controls Maximum position

7.

Indicates the Video signal path

Indicates the Audio signal path

These schematic diagrams are the latest at time of printing and are subject to change without notice.

REMARKS

IMPORTANT SAFETY NOTICEComponents identified by mark have special characteristicsimportant for safety. When replacing any of these components, useonly manufacturer's specified parts.


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TR AN S DI ODE S D558 L4Q3601 L8 D3103 B7 D557 M4Q3007 M9 D3101 B7 D556 K1Q3001 N8 D3102 B7 D555 N3Q3006 N10 D2161 G9 D554 M4

Q2304 I7 D2105 G10 D553 K4Q2303 M6 D2104 F9 D552 J2Q2301 I7 D2103 G10 D551 K3Q2103 I8 D2102 G9 D511 M5Q2102 H8 D1103 F8 D502 I2Q2101 G10 D1102 F7 D501 I2Q1108 F9 D1101 G7 D457 L5Q1107 C7 D1051 A9 D456 L5Q1106 C7 D875 J5 D454 L5Q1105 C7 D874 J4 D453 F9Q1104 C7 D873 B5 D254 C5Q1101 F7 D871 A5 D253 C5Q1052 A9 D870 871 D252 B5Q1051 C8 D869 B4 D251 B4

Q951 J9 D868 B4 ICSQ950 J9 D867 A3 IC2101 H8Q857 J4 D866 I9 IC1105 F7Q856 F9 D865 I9 IC1104 C9Q855 J5 D864 I10 IC1103 F8Q854 B4 D863 G9 IC1102 D10Q853 B4 D862 N10 IC1101 D8Q852 B5 D861 J9 IC1051 A10Q850 F5 D860 I10 IC852 I10Q701 J5 D859 H5 IC851 G5Q552 N3 D858 E5 IC850 H4Q551 K1 D857 E5 IC801 G2Q503 I2 D855 F4 IC701 K5

Q451 F8 D854 G4 IC601 L7Q394 K9 D853 H3 IC451 L5Q305 K9 D852 I4 IC251 D6Q303 K9 D851 I4 TPSQ302 J9 D850 H4 TPE14 M5Q301 K9 D806 G2 TPE13 M4Q253 C4 D805 H2 TPE12 K4Q252 C4 D804 H1 TPE11 N5Q252 C4 D803 H1 TPE10 B5Q251 D4 D802 G2 TPE9 E5Q105 M8 D801 E1 TPE8 F5Q104 M9 D705 J5 TPE7 I9Q103 F10 D704 K5 TPE6 J10Q102 G10 D703 K5 TPE5 G5

Q101 H10 D702 K5 TPE4 G5D701 K5 TPE3 E5D609 M5 TPE2 I5D607 L9 TPE1 M4

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1

10

9

8

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4

3

2

A B C D E F G H

E - BOARD TNP8EE009

Y - BOARD TNP8EY012


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TRANSISTORS

Q909 E1

Q908 C2

Q907 F4

Q906 G3Q905 F5

Q354 A7

Q353 G6

Q352 F6

Q351 F6

DIODESD906 F1

D905 G4

D904 D3D902 G4

D901 G3

D364 C9

D363 C8

D362 B9

D361 B7

D360 D8

D359 G6

D358 E7D357 F7

D356 G7

D355 F7

D354 G7TEST POINTS

TPY6 B8

TPY5 D5

TPY4 E5

TPY3 F6

TPY2 E7TPY1 G6

ICS

IC351 E8

HGFEDCBA

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panasonic tx28ex4f tx25ex4f eu4

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