Panasonic TX-W28R4 Service Manual Download Page 16

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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-Type
number to your order.

Important Safety Notice

REPLACEMENT PARTS LIST

Description

Cct Ref

Parts Number

Description

Cct Ref

Parts Number

MECHANICAL PARTS

SPEAKER

EAGG1218J2

TUNER

ENG27506G

REMOTE CONTROL

EUR511210

PANASONIC BADGE

TBM8E1728

POWER BUTTON

TBX8E049

CRT FIXING SCREW

THT1062

SPEAKER REFLECTOR

TKK8E026

DOOR LID

TKP8E1141

PANEL RIGHT

TKP8E1142

PANEL LEFT

TKP8E1143

SPEAKER NET

TKP8E1152

AV PANEL

TKP8E1254

BACK COVER

TKU8E00300

CABINET

TKY8E120

CONTROL BRACKET

TMW8E024-3

CHASSIS FRAME

TMX8E031

E P.C.B.

TNP8EE009BS

H P.C.B.

TNP8EH002AB

M P.C.B.

TNP8EM013AB

Y P.C.B.

TNP8EY012AG

MODEL LABEL

TQF8E2692

POWER CORD

TSX8E0025

DEGAUSS COIL

TXFLK01DAG

BATTERY COVER (REMOTE)

UR51EC904A

C.R.T.

W66EHK51X35

MISCELLANEOUS COMPONENTS

FIX CLIP

31221212478

I.C. SOCKET

832AG11D-ESL

RELAY

F9-4-220

84 PIN SOCKET

PCS-084A-1

PRESET PANEL

TBM8E1532-2

REAR AV LABEL

TBM8E1886

LID CATCH

TEK6940

LED HOLDER

TMW8E017

OUTER CARTON

TPC8E4676

TOP CUSHION

TPD8E623

BOTTOM CUSHION

TPD8E624

TOP BOARD

TZS9EV277

VIDEO SHELF

TZS9EV278

BASE PANEL

TZS9EV279

GLASS DOOR

TZS9EV280

INNER SIDE PANEL

TZS9EV281

CORNER PANEL

TZS9EV282

OUTER SIDE PANEL

TZS9EV283

ALLEN KEY

TZS9EV284

CHIPBOARD SCREEN

TZS9EV285

CASTOR

TZS9EV286

DOWEL

TZS9EV287

HINGE BUSH

TZS9EV288

LATCH SCREW

TZS9EV289

MAGNETIC LATCH

TZS9EV290

SPONGE

TZS9EV292

PUSH PLATE

TZS9EV293

BOTTOM PLATE

TZS9EV294

TOP HINGE

TZS9EV295

SHELF PIN

TZS9EV296

BATTERY PACK

UM-3DJ-2P

ANODE LEAD

ZTUZAE550A

RELAY

RL801 TSE1885-1

THERMISTOR

R802

232266296706

CRT SOCKET

S351

0330550049

INSTRUCTION BOOKS

ENGLISH

TQB8E2583

I.C.s

AUDIO OUTPUT

IC251

LA4282

R.G.B. OUTPUT

IC351 TDA6103Q-N3

VERTICAL OUTPUT

IC451

LA7845N

VIDEO PRCESSOR

IC601 VDP3120BPPB1

E/W CORRECTION

IC701 TEA2031A

POWER SUPPLY

IC801 STRF6654LF51

ERROR AMPLIFER

IC850 SE140N

12V REGULATOR

IC851 L78M12MRB

8V REGULATOR

IC853 AN78L08TA

LED RECEIVER

IC1061

RPM-637CBRS1

MICRO PROCESSOR

IC1101

SDA5450C48

EPROM *

IC1102

27C2001-F18

EAROM *

IC1103

XGL2-01LA

RESET

IC1104

MN1381-R(TA)

RESET

IC1105

MN1381-T(TA)

AUDIO PROCESSOR

IC2101

MSP3410DPOB4

VIDEO SWITCHING

IC3401

TEA2114

DIODES

DIODE

D251

MA2180TP

DIODE

D253

MA700TA5

DIODE

D254

MA700TA5

DIODE

D354

1SR124-4AT82

DIODE

D355

1SR124-4AT82

DIODE

D356

1SR124-4AT82

DIODE

D357

MA165TA5

DIODE

D358

MA165TA5

DIODE

D359

MA165TA5

DIODE

D360

MTZJT-7715A

DIODE

D361

MA165TA5

DIODE

D362

MA165TA5

DIODE

D363

MA165TA5

DIODE

D364

MA165TA5

DIODE

D453

MA165TA5

DIODE

D454

ERA15-02V3

DIODE

D456

MTZJT-775.6C

DIODE

D457

MA165TA5

DIODE

D501

MA165TA5

DIODE

D502

1SR124-4AT82

DIODE

D511

MA4047

Summary of Contents for TX-W28R4

Page 1: ...d PC to allow a number of diagnostic and control functions to be performed For more details contact your local Panasonic company BACK EXIT TX W28R4 Service Manual Safety Specifications Block Diagrams Schematic Diagrams PCB Views Self Check Service Information Parts List Service Hints Disassembly Location of Controls Waveforms Mechanical View Adjustments ...

Page 2: ...BACK BACK BACK E Schematic M Schematic H Schematic Y Schematic E PCB Y PCB M PCB Audio Power supply Control Video ...

Page 3: ...kΩ S Video IN Y 1V p p 75Ω 21 pin C 0 3V p p 75Ω AV2 OUT Video 21 pin 1V p p 75Ω Audio 21 pin 500mV rms 1kΩ Selectable Output 21 pin AV3 IN S Video IN Y 1V p p 75Ω 4 pin C 0 3V p p 75Ω Audio RCAx2 500mV rms10kΩ Video RCAx1 1V p p 75Ω High Voltage 30 5kV 1kV Picture Tube W66EHK51X35 66cm Audio Output 2 x 20W Music Power 8Ω Impedance Headphones 8Ω Impedance 3 5 mm Accessories supplied Remote Control...

Page 4: ...d metallic cabinet part on the receiver such as screw heads aerials connectors control shafts etc When the exposed metallic part has a return path to the chassis the reading should be between 4M ohm and 20M ohm When the exposed metal does not have a return path to the chassis the reading must be infinite LEAKAGE CURRENT HOT CHECK 1 Plug the AC cord directly into the AC outlet Do not use an isolati...

Page 5: ...SERVICE HINTS How to remove the rear cover 1 Remove the 9 screws as shown in Fig 2 LOCATION OF CONTROLS 3 SCREWS Fig 2 M Board E Board Y Board Focus Screen H Board Fig 3 ...

Page 6: ...chassis toward you as shown in Fig 4 3 Release the respective wiring clips and rotate the chassis vertically through 90 anti clockwise 4 Locate the base of the chassis frame into the hole B shown in Fig 6 5 Clip the chassis frame onto the bead clamper as shown in Fig 5 6 After servicing replace the bead clamper and ensure all wiring is returned to its original position before returning the receive...

Page 7: ...switch the TV on 2 Enter Service Mode as explained above The screen will show 3 Press the BLUE button on the remote control The screen will show 4 Press the STR button on the TV The screen will show 5 All the tuning information stored inside the TV will now be transferred to the Memory Pack This process will take 2 3 minutes to complete and when finished the screen will show Memory Pack to TV proc...

Page 8: ...ower button Self Check is also used to automatically check the bus lines and hexadecimal code of the TV set If the CCU ports have been checked and found to be incorrect or not located then will appear in place of O K For more in depth TV diagnostics use the LUCI interface as listed below Service Aids To aid in the service of our current chassis there are a number of Service Aids which have been ma...

Page 9: ...275mV 64µS 64µS 3V H Out IC601 Pin 50 Vert Out IC601 Pin 31 20mS 0 7V 13µS 3 7V SCL IC1201 Pin 3 R Out E8 Pin 5 64µS 4 6V HFLB IC601 Pin 13 64µS 6 2V R Out IC601 Pin 37 64µS 275mV G Out IC601 Pin 38 275mV 64µS Vert Drive IC451 Pin 2 20mS 57V HFLB IC701 Pin 8 64µS 1 5V G Out E8 Pin 3 64µS 4 4V SVM Out IC601 Pin 34 88mV 64µS H Out IC701 Pin 5 30mV 64µS ...

Page 10: ...al Linearity V Lin 006 Optimum setting Vertical Symmetry V Sym 002 Optimum setting DVCO DVCO 005 Receive a PAL Colour Bar Pattern For DVCO alignment press Blue button wait until the colours are changing slowly and press STR Cut off DC Cut off 0171 Ug2 Test Ug2 055 O K To adjust Cutoff connect an oscilloscope to the blue cathode adjust cutoff value using the Yellow and Blue buttons until the black ...

Page 11: ...HG OXH UHHQ 9LGHR Q 9 9LGHR 2XW G OUT 38 R OUT 37 G IN 46 R IN 45 Q354 VM COILS Q905 Q907 Q909 Q908 Q906 SVM OUT 34 E8 4 3 5 Y2 4 3 5 7 7 Q3001 G 38 B 39 Y BOARD E BOARD VIDEO PROCESSOR MICRO PROCESSOR H3 E61 1 1 H BOARD 9 AV3 M2 E17 6 6 Y C M BOARD Q305 Q303 Q301 3 2 1 7 8 9 IC351 Q306 Q304 Q302 Q950 Q951 RGB OUTPUT IC3401 8 3 VIDEO SWITCHING 6 4 4 M3 H2 4 4 8 8 2 2 6 6 Q3402 Q3201 Q3203 Q3204 Q3...

Page 12: ...IN 6 L IN 47 ANA_IN1 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 21 DACA_R 22 DACA_L E BOARD AUDIO PROCESSOR Q2303 AV3 L R 6 R 4 L HEADPHONE 7 R 5 L M4 1 M5 3 E16A M1 1 1 2 2 IC251 5 R R 7 2 L L 11 AUDIO OUTPUT Q2102 Q2103 E17 M2 10 10 8 8 M BOARD 2 L 3 R Q2301 AUDIO MONITOR OUT Q2304 Q2302 ...

Page 13: ...1106 Q1105 Q1107 Q1104 51 72 73 AV LINK SLOW 2 SLOW 1 SCL 1 SDA 1 59 58 Q3006 Q3007 55 VPROT KEYSCAN ON OFF R C L E D PROT 1 SLOW 2 OUT IN SLOW 1 SERVICE SCL SDA H BOARD E BOARD VIDEO SWITCHING IC2101 8 7 4 AUDIO PROCESSOR MICRO PROCESSOR VIDEO PROCESSOR EAROM M BOARD D1061 Q3401 IC1061 LED RECEIVER SCL M2 E17 5 5 M1 E16A 8 8 7 7 Q1051 Q1062 5 5 6 6 Q3205 Q3206 Q3201 Q3203 Q3204 LOCAL KEYS SWITCH ...

Page 14: ...14V 14V 27V 150V 29V 7V 15V 5V D867 Q852 Q854 Q855 1 D805 R805 R814 IC850 1 2 D862 R854 33V 16 M BOARD IC1104 2 RESET MICRO PROCESSOR AUDIO PROCESSOR VIDEO PROCESSOR EPROM EAROM RESET ERROR AMPLIFIER REG REG IC3401 7 VIDEO SWITCHING EW CORRECTION POWER SUPPLY RGB OUTPUT V OUTPUT AUDIO OUTPUT D801 E BOARD Y BOARD E3 2 Y3 2 M1 9 E16A 9 E1 4 1 E2 2 1 R802 DEGAUSS COIL Line Filter E62 1 H3 2 Q253 IC10...

Page 15: ...PARTS LOCATION 13 24 3 21 13 12 1 16 19 15 4 8 5 14 7 25 6 23 20 11 2 9 10 17 18 22 NOTE The numbers on the exploded view below refer to the mechanical section of the Replacement Parts List ...

Page 16: ...LF TZS9EV278 BASE PANEL TZS9EV279 GLASS DOOR TZS9EV280 INNER SIDE PANEL TZS9EV281 CORNER PANEL TZS9EV282 OUTER SIDE PANEL TZS9EV283 ALLEN KEY TZS9EV284 CHIPBOARD SCREEN TZS9EV285 CASTOR TZS9EV286 DOWEL TZS9EV287 HINGE BUSH TZS9EV288 LATCH SCREW TZS9EV289 MAGNETIC LATCH TZS9EV290 SPONGE TZS9EV292 PUSH PLATE TZS9EV293 BOTTOM PLATE TZS9EV294 TOP HINGE TZS9EV295 SHELF PIN TZS9EV296 BATTERY PACK UM 3DJ...

Page 17: ...101 BC847B TRANSISTOR Q102 BC847B TRANSISTOR Q104 BC847B TRANSISTOR Q105 BC847B TRANSISTOR Q251 2SD1328STX TRANSISTOR Q252 2SD1328STX TRANSISTOR Q253 BC847B TRANSISTOR Q254 BC847B TRANSISTOR Q301 BC847B TRANSISTOR Q302 FMY4T148 TRANSISTOR Q303 BC847B TRANSISTOR Q304 FMY4T148 TRANSISTOR Q305 BC847B TRANSISTOR Q306 FMY4T148 TRANSISTOR Q351 2SA1767 TRANSISTOR Q352 2SA1767 TRANSISTOR Q353 2SA1767 TRAN...

Page 18: ...B JA12 ERJ6GEY0R00 0 1W 5 0 S M CARB JA25 ERJ6GEY0R00 0 1W 5 0 S M CARB JA58 ERJ6GEY0R00 0 1W 5 0 S M CARB JA3 ERJ6GEY0R00 0 1W 5 0 S M CARB JA27 ERJ6GEY0R00 0 1W 5 0 S M CARB JA2 ERJ6GEY0R00 0 1W 5 0 S M CARB JSE10 ERJ6GEY0R00 0 1W 5 0 S M CARB JSM7 ERJ6GEY0R00 0 1W 5 0 S M CARB JSE4 ERJ6GEY0R00 0 1W 5 0 S M CARB JSE35 ERJ6GEY0R00 0 1W 5 0 S M CARB JSE33 ERJ6GEY0R00 0 1W 5 0 S M CARB JSE3 ERJ6GEY...

Page 19: ... M CARB R380 ERJ6GEY0R00 0 1W 5 0 S M CARB R381 ERJ6GEYJ473 0 1W 5 47K S M CARB R451 ERJ6GEYJ223 0 1W 5 22K S M CARB R452 ERJ6GEY0R00 0 1W 5 0 S M CARB R453 ERJ6GEY0R00 0 1W 5 0 S M CARB R454 ERJ6GEYJ752 0 1W 5 7K5 S M CARB R455 ERJ6GEYJ222 0 1W 5 2K2 S M CARB R456 ERJ6GEYJ104 0 1W 5 100K S M CARB R457 ERJ6GEYJ223 0 1W 5 22K CARBON R458 ERD25TJ1R5 0 25W 5 1R5 S M CARB R459 ERJ6GEYJ101 0 1W 5 100 C...

Page 20: ...1W 5 330 S M CARB R1104 ERJ6GEYJ331 0 1W 5 330 S M CARB R1105 ERJ6GEYJ101 0 1W 5 100 S M CARB R1106 ERJ6GEYJ104 0 1W 5 100K S M CARB R1107 ERJ6GEYJ104 0 1W 5 100K S M CARB R1108 ERJ6GEYJ102 0 1W 5 1K S M CARB R1109 ERJ6GEYJ472 0 1W 5 4K7 S M CARB R1110 ERJ6GEYJ472 0 1W 5 4K7 S M CARB R1111 ERJ6GEYJ473 0 1W 5 47K S M CARB R1112 ERJ6GEYJ473 0 1W 5 47K S M CARB R1113 ERJ6GEYJ101 0 1W 5 100 S M CARB R...

Page 21: ...J102 0 1W 5 1K S M CARB R3214 ERJ6GEYJ683 0 1W 5 68K S M CARB R3215 ERJ6GEYJ302 0 1W 5 3K S M CARB R3216 ERJ6GEYJ750 0 1W 5 75 S M CARB R3217 ERJ6GEYJ223 0 1W 5 22K S M CARB R3218 ERJ6GEYJ223 0 1W 5 22K S M CARB R3219 ERJ6GEYJ102 0 1W 5 1K S M CARB R3220 ERJ6GEYJ683 0 1W 5 68K S M CARB R3221 ERJ6GEYJ302 0 1W 5 3K S M CARB R3222 ERJ6GEYJ223 0 1W 5 22K S M CARB R3223 ERJ6GEYJ223 0 1W 5 22K S M CARB ...

Page 22: ...53KBX 50V 15nF S M CAP C612 ECUV1H153KBX 50V 15nF S M CAP C613 ECUV1H153KBX 50V 15nF S M CAP C614 ECUV1H050CCX 50V 50pF S M CAP C615 ECUV1H050CCX 50V 50pF ELECT C616 ECA1HM101GB 50V 100µF S M CAP C617 ECUV1H223KBX 50V 22nF ELECT C618 ECA1CM221GB 16V 220µF ELECT C619 ECJ2VB1H473K 350V 47nF ELECT C620 ECA1HM101GB 50V 100µF ELECT C621 ECJ2VB1C104K 350V 100nF S M CAP C622 ECUV1H683KBX 50V 68nF S M CAP...

Page 23: ...H470JCX 50V 47pF S M CAP C2126 ECUV1H070DTX 50V 70pF S M CAP C2127 ECUV1H010CCX 50V 1pF S M CAP C2128 ECUV1H010CCX 50V 1pF ELECT C2129 ECA1CM102B 16V 1pF ELECT C2130 ECA1CM331B 16V 330µF S M CAP C2131 ECUV1H103ZFX 50V 10nF S M CAP C2132 ECUV1H103ZFX 50V 10nF S M CAP C2134 ECUV1H103ZFX 50V 10nF ELECT C2135 ECA1HM101GB 50V 100µF ELECT C2136 ECJ2VF1H104Z 350V 100nF ELECT C2137 ECA1CM100GB 16V 10µF S ...

Page 24: ... CAP C3407 ECUV1H271JCX 50V 270pF ELECT C3408 ECA1HM101GB 50V 100µF ELECT C3601 ECA1HM101GB 50V 100µF S M CAP JSE28 ECUV1H104KBX 50V 100nF TERMINALS AND LINKS RCA HEADPHONE JACK JK2301 JPJ841101320 A V TERMINAL JK3201 TJB16656 SWITCHES SWITCH S802 ESB92S11B SWITCH S1251 EVQ23405R SWITCH S1252 EVQ23405R SWITCH S1253 EVQ23405R SWITCH S1254 EVQ23405R SWITCH S1255 EVQ23405R 22 ...

Page 25: ...and are subject to change without notice REMARKS a Do not touch the hot part or the hot and cold parts at the same time as you are liable to a shock hazard b Do not short circuit the hot and cold circuits as electrical components may be damaged c Do not connect an instrument such as an oscilloscope to the hot and cold circuits simultaneously as this may cause fuse failure Connect the earth of the ...

Page 26: ......

Page 27: ......

Page 28: ......

Page 29: ......

Page 30: ... Q856 F9 D865 I9 IC1104 C9 Q855 J5 D864 I10 IC1103 F8 Q854 B4 D863 G9 IC1102 D10 Q853 B4 D862 N10 IC1101 D8 Q852 B5 D861 J9 IC1051 A10 Q850 F5 D860 I10 IC852 I10 Q701 J5 D859 H5 IC851 G5 Q552 N3 D858 E5 IC850 H4 Q551 K1 D857 E5 IC801 G2 Q503 I2 D855 F4 IC701 K5 Q451 F8 D854 G4 IC601 L7 Q394 K9 D853 H3 IC451 L5 Q305 K9 D852 I4 IC251 D6 Q303 K9 D851 I4 TP S Q302 J9 D850 H4 TPE14 M5 Q301 K9 D806 G2 T...

Page 31: ...354 A7 Q353 G6 Q352 F6 Q351 F6 DIODES D906 F1 D905 G4 D904 D3 D902 G4 D901 G3 D364 C9 D363 C8 D362 B9 D361 B7 D360 D8 D359 G6 D358 E7 D357 F7 D356 G7 D355 F7 D354 G7 TEST POINTS TPY6 B8 TPY5 D5 TPY4 E5 TPY3 F6 TPY2 E7 TPY1 G6 IC S IC351 E8 H G F E D C B A 1 2 3 4 5 6 7 8 9 ...

Page 32: ...EM013 TRANSISTORS Q1061 C2 Q1062 C2 Q3201 C8 Q3202 B9 Q3203 B8 Q3204 B9 Q3205 B9 Q3206 A9 Q3207 B10 Q3208 B9 Q3209 B10 DIODES D1061 C1 D3201 B4 D3202 B4 D3203 B3 IC S IC1601 D2 C B A 1 2 3 4 5 6 7 8 9 11 12 13 10 D ...

Page 33: ...NOTES 30 ...

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