background image

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.

REPLACEMENT PARTS LIST

Important Safety Notice

Description

Cct Ref

Parts Number

Description

Cct Ref

Parts Number

COMMON PARTS

MECHANICAL PARTS

SPEAKER              

     1

EASG15S505A2

TUNER                

     2

ENG27507G   

REMOTE CONTROL     

     3

EUR511200   

PANASONIC BADGE       

     4

TBM8E1728

POWER BUTTON        

     5

TBX8E050    

REAR AV COVER        

     6

TKP8E1222   

DOOR LID             

     7

TKP8E1223   

CHASSIS FRAME        

     8

TMX8E020    

H P.C.B.             

     9

TNP8EH002AA 

N P.C.B.             

    10

TNP8EN016AD 

BATTERY COVER (REMOTE)

    11

UR51EC904A  

CRT FIXING SCREW      

    12

VP17005-32  

MISCELLANEOUS COMPONENTS

FIX CLIP              

      

31221212478

I.C. SOCKET           

      

832AG11D-ESL

RELAY   

      

F9-4-220

84 PIN SOCKET        

      

PCS-084A-1  

PRESET LABEL        

      

TBM8E1615   

REAR AV LABEL        

      

TBM8E1781   

LID CATCH

      

TEK6940

POWER BUTTON SPRING

      

TES8E015    

LED HOLDER       

      

TMW8E020-1  

LED HOLDER        

      

TMW8E027    

BATTERY PACK          

      

UM-3DJ-2P

ANODE LEAD        

      

ZTUZAE550A  

RELAY                 

RL801 TSE1885-1

THERMISTOR            

R802  

232266296706

CRT SOCKET            

S351  

0330550049  

INSTRUCTION BOOKS

BULG./ROMAN.     

      

TQB8E2550MN 

POLISH/HUNG.     

      

TQB8E2550PQ 

CZECH/ENGLISH    

      

TQB8E2550RU 

I.C.s

AUDIO OUTPUT        

IC251 

LA4282      

R.G.B. AMPLIFIER     

IC351 TDA6103Q-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 REGULATOR          

IC853 AN78L08TA

LED RECEIVER     

IC1051

RPM-637CBRL 

LED RECEIVER          

IC1071

RPM6937-V4  

MICRO PROCESSOR  

IC1101

SDA5450C47  

EPROM *          

IC1102

27C2001-G01 

DIODE                

IC1104

MN1381-R(TA)

DIODE                

IC1105

MN1381-T(TA)

AUDIO PROCESSOR  

IC2101

MSP3410DPOB4

AV SWITCHING     

IC3401

TEA2114     

FUSES

FUSE             

F802  

19181-3.15  

FUSE HOLDER

F8021 EYF52BC

FUSE HOLDER

F8022 EYF52BC

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      

DIODE                

D551  

ERD07-15L7  

DIODE                 

D552  

RU3LFA1     

DIODE                

D553  

1SR124-4AT82

DIODE                

D554  

1SR124-4AT82

DIODE

D556  

MA165TA5

DIODE                

D557  

1SR124-4AT82

DIODE                

D558  

1SR124-4AT82

DIODE                

D601  

DAN217T146  

DIODE                

D603  

DAN217T146  

DIODE                

D605  

DAN212KT146 

DIODE

D606  

MA165TA5

DIODE   

D607  

MA4051

DIODE                

D609  

1SR124-4AT82

DIODE                

D615  

STZ6.2NT146 

DIODE                

D616  

STZ6.2NT146 

DIODE

D701  

MA165TA5

DIODE                 

D702  

MTZJT-775.1C

DIODE                

D704  

MA29TA5     

DIODE                

D705  

MTZJT-775.6C

DIODE                

D801  

RBV4-08     

13

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...

Reviews: