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Description

Cct Ref

Parts Number

Description

Cct Ref

Parts Number

S.M.CARB

R301  

ERJ6GEYJ391

0.1W

5%

390

S.M.CARB

R302  

ERJ6GEYJ102

0.1W

5%

1K

S.M.CARB

R303  

ERJ6GEYJ750

0.1W

5%

75

S.M.CARB

R304  

ERJ6GEYJ331

0.1W

5%

330

S.M.CARB

R305  

ERJ6GEYJ391

0.1W

5%

390

S.M.CARB

R306  

ERJ6GEYJ102

0.1W

5%

1K

S.M.CARB

R307  

ERJ6GEYJ750

0.1W

5%

75

S.M.CARB

R308  

ERJ6GEYJ331

0.1W

5%

330

S.M.CARB

R309  

ERJ6GEYJ391

0.1W

5%

390

S.M.CARB

R310  

ERJ6GEYJ102

0.1W

5%

1K

S.M.CARB

R311  

ERJ6GEYJ750

0.1W

5%

75

S.M.CARB

R312  

ERJ6GEYJ331

0.1W

5%

330

S.M.CARB

R351  

ERJ6GEYJ302

0.1W

5%

3K

S.M.CARB

R352  

ERJ6GEYJ302

0.1W

5%

3K

S.M.CARB

R353  

ERJ6GEYJ302

0.1W

5%

3K

S.M.CARB

R354  

ERJ6GEYJ102

0.1W

5%

1K

S.M.CARB

R355  

ERJ6GEYJ102

0.1W

5%

1K

S.M.CARB

R356  

ERJ6GEYJ102

0.1W

5%

1K

CARBON

R357  

ERDS1TJ114  

0.5W

5%

110K

CARBON

R358  

ERDS1TJ114  

0.5W

5%

110K

CARBON

R359  

ERDS1TJ114  

0.5W

5%

110K

CARBON

R363  

ERD25TJ103

0.25W

5%

10K

CARBON

R364  

ERD25TJ103

0.25W

5%

10K

CARBON

R365  

ERD25TJ103

0.25W

5%

10K

CARBON

R366  

ERDS1TJ152

0.5W

5%

1K5

CARBON

R367  

ERDS1TJ152

0.5W

5%

1K5

CARBON

R368  

ERDS1TJ152

0.5W

5%

1K5

CARBON

R369  

ERD25TJ472

0.25W

5%

4K7

S.M.CARB

R370  

ERJ6GEYJ102

0.1W

5%

1K

FUSIBLE 

R372  

ERQ12AJ121  

0.5W

5%

120

S.M.CARB

R373  

ERJ6GEYJ220 

0.1W

5%

22

CARBON

R374  

ERD25TJ274

0.25W

5%

270K

S.M.CARB

R375  

ERJ6GEYJ684 

0.1W

5%

680K

S.M.CARB

R376  

ERJ6GEYJ183

0.1W

5%

18K

METAL

R377  

ERQ1ABJP5R1 

0.5W

5%

5R1

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

CARBON

R460  

ERDS1TJ331  

0.5W

5%

330

WOUND

R461  

ERW2PK1R2   

2W 10%

1R2

CARBON

R463  

ERD25TJ222

0.25W

5%

2K2

S.M.CARB

R464  

ERJ6GEYJ182

0.1W

5%

1K8

S.M.CARB

R465  

ERJ6GEYJ681

0.1W

5%

680

S.M.CARB

R502  

ERJ6GEYJ511 

 0.1W

 5%

  510

CARBON  

R506  

ERD25TJ560  

0.25W

5%

56

METAL

R507  

ERG1FJ271P  

1W

5%

270

CARBON

R509  

ERDS1TJ152

0.5W

5%

1K5

CARBON  

R510  

ERDS1FJ152  

0.5W

5%

1K5

METAL   

R553  

ERG1SJ152   

1W

5%

1K5

METAL   

R554  

ERG1SJ101   

1W

5%

100

METAL   

R555  

ERQ12HKR33  

0.5W

5%

R33

CARBON  

R558  

ERDS1TJ124  

0.5W

5%

120K

METAL   

R559  

ERQ12HKR33  

0.5W

5%

R33

S.M.CARB

R560  

ERJ6GEYJ274 

0.1W

5%

270K

S.M.CARB

R561  

ERJ6GEYJ273

0.1W

5%

27K

S.M.CARB

R563  

ERJ6GEYJ474

0.1W

5%

470K

S.M.CARB

R564  

ERJ6GEYJ623 

0.1W

5%

62K

S.M.CARB

R566  

ERJ6GEYJ563

0.1W

5%

56K

WOUND

R567  

ERF7ZK1R0   

7W 10%

1

S.M.CARB

R601  

ERJ6GEYJ101

0.1W

5%

100

S.M.CARB

R602  

ERJ6GEYJ821

0.1W

5%

820

S.M.CARB

R603  

ERJ8GEYJ103 

.125W

5%

10K

S.M.CARB

R604  

ERJ6GEYJ101

0.1W

5%

100

CARBON

R605  

ERD25TJ331

0.25W

5%

330

CARBON

R606  

ERD25TJ331

0.25W

5%

330

S.M.CARB

R607  

ERJ6GEYJ821

0.1W

5%

820

S.M.CARB

R608  

ERJ6GEYJ271

0.1W

5%

270

S.M.CARB

R609  

ERJ6GEYJ122

0.1W

5%

1K2

S.M.CARB

R610  

ERJ6GEY0R00

0.1W

5%

0

S.M.CARB

R611  

ERJ6GEYJ103

0.1W

5%

10K

S.M.CARB

R612  

ERJ6GEYJ101

0.1W

5%

100

S.M.CARB

R613  

ERJ6GEYJ152

0.1W

5%

1K5

S.M.CARB

R622  

ERJ6GEY0R00

0.1W

5%

0

S.M.CARB

R636  

ERJ6GEYJ750

0.1W

5%

75

S.M.CARB

R645  

ERJ6GEYJ103

0.1W

5%

10K

S.M.CARB

R647  

ERJ6GEYJ472

0.1W

5%

4K7

S.M.CARB

R648  

ERJ6GEYJ152

0.1W

5%

1K5

S.M.CARB

R650  

ERJ6GEYJ750

0.1W

5%

75

S.M.CARB

R651  

ERJ6GEYJ750

0.1W

5%

75

S.M.CARB

R652  

ERJ6GEYJ102

0.1W

5%

1K

S.M.CARB

R654  

ERJ6GEYJ622

0.1W

5%

6K2

S.M.CARB

R655  

ERJ6GEYJ103

0.1W

5%

10K

S.M.CARB

R658  

ERJ6GEYJ153

0.1W

5%

15K

S.M.CARB

R659  

ERJ6GEY0R00

0.1W

5%

0

S.M.CARB

R660  

ERJ6GEY0R00

0.1W

5%

0

FUSIBLE 

R701  

ERQ12AJ101  

0.5W

5%

100

FUSIBLE

R702  

ERQ12HJ8R2  

0.5W

5%

8R2

METAL   

R703  

ERG2FJ821   

2W

5%

820

S.M.CARB

R704  

ERJ6GEYJ563

0.1W

5%

56K

S.M.CARB

R705  

ERJ6GEYJ104

0.1W

5%

100K

S.M.CARB

R706  

ERJ6GEYJ103

0.1W

5%

10K

S.M.CARB

R707  

ERJ6GEYJ391

0.1W

5%

390

S.M.CARB

R708  

ERJ6GEYJ393

0.1W

5%

39K

S.M.CARB

R709  

ERJ6GEYJ393

0.1W

5%

39K

S.M.CARB

R710  

ERJ6GEYJ273

0.1W

5%

27K

METAL   

R711  

ERG1SJ101   

1W

5%

100

S.M.CARB

R712  

ERJ6GEYJ102

0.1W

5%

1K

SOLID   

R803  

ERC12ZGK335D

 0.5W 10%

3M3

CARBON

R805  

ERD25TJ473

0.25W

5%

47K

CARBON

R806  

ERD25TJ100

0.25W

5%

10

CARBON

R807  

ERD25TJ332

0.25W

5%

3K3

CARBON

R809  

ERD25TJ681

0.25W

5%

680

WOUND

R810  

ERW2PKR33   

2W 20%

R33

WOUND

R811  

ERW2PKR33   

2W 20%

R33

CARBON

R812  

ERD75TAJ825

0.75W

5%

8M2

WOUND   

R813  

ERF7ZK2R7   

7W 20%

2R7

CARBON

R814  

ERD25TJ473

0.25W

5%

47K

CARBON

R815  

ERD25TJ222

0.25W

5%

2K2

CARBON

R850  

ERD25TJ122

0.25W

5%

1K2

S.M.CARB

R852  

ERJ6GEY0R00

0.1W

5%

0

S.M.CARB

R853  

ERJ6GEYJ102

0.1W

5%

1K

METAL   

R854  

ERG2FJ223   

2W

5%

22K

S.M.CARB

R855  

ERJ6GEYJ752 

0.1W

5%

7K5

S.M.CARB

R857  

ERJ6GEYJ752 

0.1W

5%

7K5

S.M.CARB

R858  

ERJ6GEYJ752 

0.1W

5%

7K5

S.M.CARB

R859  

ERJ6GEYJ753 

0.1W

5%

75K

FUSIBLE

R860  

ERQ1CJP2R2  

1W 10%

2R2

CARBON

R861  

ERD25TJ221

0.25W

5%

220

CARBON

R862  

ERD25TJ272  

0.25W

5%

2K7

CARBON

R863  

ERDS1TJ560  

0.5W

5%

56

CARBON  

R864  

ERDS1TJ680  

0.5W

5%

68

S.M.CARB

R865  

ERJ6GEY0R00

0.1W

5%

0

S.M.CARB

R867  

ERJ6GEYJ103

0.1W

5%

10K

S.M.CARB

R868  

ERJ6GEYJ223

0.1W

5%

22K

S.M.CARB

R869  

ERJ6GEY0R00

0.1W

5%

0

16

Summary of Contents for TX-28LD4P

Page 1: ...C to allow a number of diagnostic and control functions to be performed For more details contact your local Panasonic company BACK EXIT TX 28 25LD4P Service Manual Safety Specifications Block Diagrams...

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

Page 3: ...500mV rms 1k AV1 IN Video 21 pin 1V p p 75 Audio 21 pin 500mV rms 10k RGB 21 pin AV1 OUT Video 21 pin 1V p p 75 Audio 21 pin 500mV rms 1k AV2 IN Video 21 pin 1V p p 75 Audio 21 pin 500mV rms 10k S Vid...

Page 4: ...abinet 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 W...

Page 5: ...SERVICE HINTS HOW TO REMOVE THE REAR COVER 1 Remove the 12 screws as shown in Fig 2 LOCATION OF CONTROLS 3 SCREWS Fig 2 Fig 3 N Board E Board Y Board Focus Screen H Board...

Page 6: ...h the TV on 2 Go into 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 Al...

Page 7: ...s at the front of the set at the same time pressing the STATUS button on the remote control and the screen will show If the CCU ports have been checked and found to be incorrect or not located then wi...

Page 8: ...75mV 64 S 64 S 3V H Out IC601 Pin 50 Vert Out IC601 Pin 31 20mS 0 7V 13 S 3 7V SCL IC1201 Pin 3 R Out E8 Pin 5 64 S 4 6V HFLB IC601 Pin 13 64 S 6 2V R Out IC601 Pin 37 64 S 275mV G Out IC601 Pin 38 27...

Page 9: ...l 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 changin...

Page 10: ...OUT 39 Q305 Q303 Q301 E8 4 3 5 Q353 Q352 Q351 CRT 3 2 1 7 8 9 Y2 4 3 5 IC351 TUNER Q104 5HG OXH UHHQ 9LGHR Q 9 9LGHR 2XW G OUT 38 R OUT 37 G IN 46 R IN 45 Q306 Q304 Q302 Q354 7 7 VM COILS Q905 Q907 Q9...

Page 11: ...OUT 3 L OUT 1 R OUT 3 L OUT 2 R IN 6 L IN 2 R IN 6 L IN 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 4 L HEA...

Page 12: ...60 Q854 52 Q853 74 IC1071 81 AV2 8 10 AV1 8 10 12 Q856 75 Q851 Q1106 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...

Page 13: ...B1 P2 P1 S5 S2 S7 10 9 6 8 5 6 2 6 3 1 6 12V 200V 33V 14V 14V 27V 150V 29V 7V 15V 5V D867 Q852 Q854 Q855 1 D805 R805 R814 IC850 1 2 D862 R854 33V 16 REMOTE CONTROL RECEIVER N BOARD RESET MICRO PROCESS...

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

Page 15: ...N3 VERTICAL OUTPUT IC451 LA7845N VIDEO PROCESSOR IC601 VDP3108BPPB1 HORIZONTAL OUTPUT IC701 TEA2031A POWER SUPPLY IC801 STRF6654LF51 ERROR AMPLIFER IC850 SE140N 12V REGULATOR IC851 L78M12MRB 8V REGUL...

Page 16: ...OR Q351 2SA1767 TRANSISTOR Q352 2SA1767 TRANSISTOR Q353 2SA1767 TRANSISTOR Q354 BC857B TRANSISTOR Q451 BC857B TRANSISTOR Q503 2SD2398 M2 TRANSISTOR Q551 BU2508AXLB TRANSISTOR Q552 2SC1473 RN TRANSISTO...

Page 17: ...RJ6GEY0R00 0 1W 5 0 S M CARB JSE5 ERJ6GEY0R00 0 1W 5 0 S M CARB JA54 ERJ6GEY0R00 0 1W 5 0 S M CARB JA52 ERJ6GEY0R00 0 1W 5 0 S M CARB JSH001 ERJ6GEY0R00 0 1W 5 0 S M CARB JSE3 ERJ6GEY0R00 0 1W 5 0 S M...

Page 18: ...3 ERJ6GEYJ474 0 1W 5 470K S M CARB R564 ERJ6GEYJ623 0 1W 5 62K S M CARB R566 ERJ6GEYJ563 0 1W 5 56K WOUND R567 ERF7ZK1R0 7W 10 1 S M CARB R601 ERJ6GEYJ101 0 1W 5 100 S M CARB R602 ERJ6GEYJ821 0 1W 5 8...

Page 19: ...03 0 1W 5 10K S M CARB R1131 ERJ6GEYJ103 0 1W 5 10K S M CARB R1132 ERJ6GEYJ101 0 1W 5 100 S M CARB R1133 ERJ6GEYJ273 0 1W 5 27K S M CARB R1136 ERJ6GEYJ823 0 1W 5 82K S M CARB R1137 ERJ6GEY0R00 0 1W 5...

Page 20: ...ORS S M CAP C102 ECUV1H103ZFX 50V 10nF ELECT C103 ECJ2VF1H104Z 350V 100nF S M CAP C106 ECUV1H560JCX 50V 56pF ELECT C107 ECJ2VF1H104Z 350V 100nF ELECT C108 ECA1CM100GB 16V 10 F S M CAP C109 ECUV1H102JC...

Page 21: ...0V 1 5nF CERAMIC C850 ECKC3D471JB 2KV 470pF ELECT C851 ECA2CM221E 160V 220 F ELECT C852 ECA2CHG101E 160V 100 F CERAMIC C853 ECKC2H471J 500V 470pF ELECT C854 ECA1EM102GB 25V 100 F CERAMIC C855 ECKC2H47...

Page 22: ...UV1H222JCX 50V 2 2nF ELECT C3017 ECA1CM470GB 16V 47 F S M CAP C3019 ECUV1H561JCX 50V 560pF ELECT C3020 ECJ3VB1C474K 3 5KV 470nF S M CAP C3021 ECUV1H222JCX 50V 2 2nF S M CAP C3022 ECUV1H222JCX 50V 2 2n...

Page 23: ...ber Description Cct Ref Parts Number Y P C B 20 TNP8EY012AF MISCELLANEOUS COMPONENTS OUTER CARTON TPC8E4659 TOP CUSHION TPD8E655 BOTTOM CUSHION TPD8E656 I C s EAROM IC1103 XGL2 01AP CAPACITORS CERAMIC...

Page 24: ...ng 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 c...

Page 25: ......

Page 26: ......

Page 27: ......

Page 28: ......

Page 29: ...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 E...

Page 30: ...54 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...

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