Panasonic TX-25MK1, Service Manual

Page 1: ...1 pin 1V p p 75Ω Audio 21 pin 500mV rms 10kΩ 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 Audio RCAx2 500mV rms 10kΩ Video RCAx1 1V p p 75Ω High Voltage 28 2kV 1kV Picture Tube A59ECF50X42 59cm Audio Output 2 x 15W Music Power 8Ω Impedance Headphones 8Ω Impedance 3 5mm Accessories supplied Remote Control 2 ...

Page 2: ...ic 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 a c cord directly into the a c outlet Do not use an isolation tra...

Page 3: ...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 E BOARD Y BOARD FOCUS SCREEN H BOARD Fig 3 ...

Page 4: ...rotate the chassis horizontally through 90 anti clockwise 4 Move the EHT lead around to the left side of the CRT neck 5 Elevate the front of the chassis 6 Clip the chassis frame onto the bead clamper on the degauss coil as shown in Fig 5 7 Locate the base of the chassis frame into the hole marked A shown in Fig 6 8 After servicing replace the bead clamper and ensure all wiring is returned to its o...

Page 5: ...e STATUS button on the remote control To exit Self Check switch off the TV set at the power button 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 To aid in the service of our current chassis there are a number of Service Aids which have been made available LUCI interface kit Linked Utility Computer Interface Part number TZS...

Page 6: ...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 7: ...arity 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 Press STR and adjust cutoff value using the Yellow and Blue buttons until the...

Page 8: ... B IN 47 B OUT 39 Q303 Q301 E8 4 3 5 Q353 Q352 Q351 CRT 3 2 1 7 8 9 Y2 4 3 5 IC351 Q104 5HG OXH UHHQ 9LGHR Q 9 9LGHR 2XW G OUT 38 R OUT 37 G IN 46 R IN 45 Q304 Q302 Q354 7 7 VM COILS Q905 Q907 Q909 Q908 Q906 SVM OUT 34 Q950 Q951 Q3001 G 38 B 39 Y BOARD E BOARD RGB OUTPUT VIDEO PROCESSOR MICRO PROCESSOR H3 E61 E15 1 6 8 H1 1 6 8 H BOARD IC3401 Q3402 8 6 3 VIDEO SWITCHING ...

Page 9: ...R R 7 6 R 1 R 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 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 HEADPHONE 7 R 5 L E6 1 E7 3 21 DACA_R 22 DACA_L E BOARD AUDIO PROCESSOR AUDIO OUTPUT Q2303 Q2301 AUDIO MONITOR OUT Q2304 Q2302 ...

Page 10: ... SCL 1 SCL SDA 48 49 8 7 4 5 IC3401 71 LOCAL KEYS SWITCH MATRIX 60 52 74 IC1051 81 AV2 8 10 AV1 8 10 12 75 51 72 73 AV LINK SLOW 2 SLOW 1 SCL 1 SDA 1 59 58 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 AUDIO PROCESSOR MICRO PROCESSOR VIDEO PROCESSOR EAROM REMOTE CONTROL RECEIVER 3 ...

Page 11: ... 1 3 1 S4 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 RESET MICRO PROCESSOR AUDIO PROCESSOR VIDEO PROCESSOR EPROM EAROM RESET REG 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 E1 4 1 E2 2 1 R80...

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

Page 13: ...N BOOKS ENGLISH TQB8E2823 I C s AUDIO OUTPUT IC251 LA4282 R G B OUTPUT IC351 TDA6103Q N3 VERTICAL OUTPUT IC451 LA7845N VIDEO PROCESSOR IC601 VDP3108BPPC2 E W CORRECTION IC701 TEA2031A POWER SUPPLY IC801 STRF6654LF51 ERROR AMPLIFER IC850 SE140N 12V REGULATOR IC851 L78M12MRB 8V REGULATOR IC853 AN78L08TA LED RECEIVER IC1051 RPM6937 V4 MICRO PROCESSOR IC1101 SDA5450C48UK EPROM IC1102 27C2001 L06 EAROM...

Page 14: ...ISTOR Q352 2SA1767 TRANSISTOR Q353 2SA1767 TRANSISTOR Q354 BC857B TRANSISTOR Q451 BC857B TRANSISTOR Q503 2SD2398 M2 TRANSISTOR Q551 BU4508AXLB TRANSISTOR Q552 2SC1473 RN TRANSISTOR Q701 BC857B TRANSISTOR Q850 2SD1273PLB TRANSISTOR Q851 BC857B TRANSISTOR Q852 2SC1383 S TRANSISTOR Q853 BC847B TRANSISTOR Q854 BC847B TRANSISTOR Q855 BC847B TRANSISTOR Q856 BC847B TRANSISTOR Q857 2SA1018QTA TRANSISTOR Q...

Page 15: ...ERJ8GEY0R00 125W 5 0 S M CARB JA47 ERJ6GEY0R00 0 1W 5 0 S M CARB JA48 ERJ6GEY0R00 0 1W 5 0 S M CARB JA49 ERJ6GEY0R00 0 1W 5 0 S M CARB JA50 ERJ8GEY0R00 125W 5 0 S M CARB JA51 ERJ8GEY0R00 125W 5 0 S M CARB JA52 ERJ6GEY0R00 0 1W 5 0 S M CARB JA53 ERJ8GEY0R00 125W 5 0 S M CARB JA54 ERJ6GEY0R00 0 1W 5 0 S M CARB JA55 ERJ6GEY0R00 0 1W 5 0 S M CARB JA56 ERJ8GEY0R00 125W 5 0 S M CARB JA57 ERJ6GEY0R00 0 1...

Page 16: ...R510 ERDS1FJ152 0 5W 5 1K5 METAL R553 ERG1SJ152 1W 5 1K5 METAL R554 ERG1SJ101 1W 5 100 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 S M CARB R601 ERJ6GEYJ101 0 1W 5 100 S M CARB R602 ERJ6GEY...

Page 17: ...W 5 100 S M CARB R1127 ERJ6GEYJ101 0 1W 5 100 S M CARB R1128 ERJ6GEYJ682 0 1W 5 6K8 S M CARB R1129 ERJ6GEYJ682 0 1W 5 6K8 S M CARB R1130 ERJ6GEYJ103 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 0 S M CARB R1138 ERJ6GEYJ474 0 1W 5 470K S M CARB R113...

Page 18: ... 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 10µF S M CAP C109 ECUV1H102JCX 50V 1nF S M CAP C110 ECUV1H103ZFX 50V 10nF ELECT C111 ECA1HMR33GB 50V 0 33µF S M CAP C117 ECUV1H103ZFX 50V 10nF ELECT C118 ECJ2VF1H104Z 350V 100nF ELECT C119 ECA1CM221GB 16V 220µF ELECT C120 ECA1CM221GB ...

Page 19: ...04K 600V 100nF CERAMIC C818 ECKWNA332MEC 250V 3 3nF FILM C819 ECQB1H152K 50V 1 5nF CERAMIC C850 ECKC3D471JB 2KV 470pF ELECT C851 ECA2CM221E 160V 220µF ELECT C852 ECA2CHG101E 160V 100µF CERAMIC C853 ECKC2H471J 500V 470pF ELECT C854 ECA1EM102GB 25V 100µF CERAMIC C855 ECKC2H471J 500V 470pF ELECT C856 ECA1AHG222B 10V 2200µF CERAMIC C857 ECKC2H471J 500V 470pF ELECT C858 ECEA1HGE102 50V 1000µF ELECT C85...

Page 20: ...V 2 2nF S M CAP C3008 ECUV1H222JCX 50V 2 2nF S M CAP C3009 ECUV1H222JCX 50V 2 2nF ELECT C3010 ECA1CM470GB 16V 47µF S M CAP C3012 ECUV1H561JCX 50V 560pF ELECT C3013 ECJ3VB1C474K 3 5KV 470nF S M CAP C3014 ECUV1H222JCX 50V 2 2nF S M CAP C3015 ECUV1H222JCX 50V 2 2nF S M CAP C3016 ECUV1H222JCX 50V 2 2nF ELECT C3017 ECA1CM470GB 16V 47µF S M CAP C3019 ECUV1H561JCX 50V 560pF ELECT C3020 ECJ3VB1C474K 3 5KV...

Page 21: ...g 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 th...

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Page 25: ...5 F7 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 IC853 J9 Q701 J5 D859 H5 IC852 I10 Q552 N3 D858 E5 IC851 G5 Q551 K1 D857 E5 IC850 H4 Q503 I2 D856 F4 IC801 G2 Q451 F8 D855 F4 IC701 K5 Q305 K9 D854 G4 IC601 L7 Q304 K9 D853 H3 IC451 L5 Q303 K9 D852 I4 IC251 D6 Q302 J9 D851 I4 Q301 K9 D850 H4 TP...

Page 26: ...4 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 26 H G F E D C B A 1 2 3 4 5 6 7 8 9 ...

Page 27: ...H BOARD TNP8EH002 TRANSISTORS Q3401 C3 Q3402 A2 I C S IC3401 C2 27 1 2 3 A C B ...