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Colour Television

TX-28LD4DP
TX-25LD4DP

EURO4 Chassis

SPECIFICATIONS

(Information in brackets { } refers to model TX-25LD4DP)
Power Source:

220-240V AC, 50Hz

Power Consumption:

116W

Aerial Impedance:

75

 unbalanced, Coaxial Type

Stand-by Power
Consumption:

1,8W

Receiving System:

PAL I, PAL 525/60
M.NTSC
NTSC (AV only)

Receiving Channels:

UHF E21 - E69

Intermediate Frequency:
Video

39,5MHz

Audio

33,5MHz, 32,95MHz

Colour

35,07MHz (PAL)

Video/Audio
Terminals:
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-Video IN

Y: 1V p-p 75

(21-pin)

C:0.3V p-p 75

AV2 OUT

Video (21 pin)  1Vp-p 75

Audio (21 pin)

500mV rms 1k

Selectable output (21 pin)

AV3 IN

Audio (RCAx2) 500mV rms 10k

Video (RCAx1) 1V p-p 75

Dolby Surround Out

5 x Dolby Surround Out RCA

(Rear)

External Speaker connections
2 x Rear
1 x Centre
1 x External Bass(3D Subwoofer)

High Voltage:

28,5kV 

±

1kV

{28,2kV 

±

1kV}

Picture Tube:

A66ECF50X41

66cm

{A59ECF50X41

59cm}

Audio Output:

Front Left/Right

2 x 20W

(Music Power)

External Centre 

20W

External Bass

26W

Surround

2 x 15W

8

 Impedance

Headphones:

8

 Impedance

3,5 mm

Accessories
supplied :

Remote Control
2 x R6 (UM3) Batteries
TS-600DP Video cabinet / Speaker pack

Dimensions:
Height:

596,5 mm

{550,5 mm}

Width:

778 mm

{730 mm}

Depth:

481 mm

{478,5 mm}

Net weight:

33kg

{27kg}

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

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

Panasonic CS ( U.K. ) Ltd.

WILLOUGHBY ROAD,

BRACKNELL,

BERKS.,

RG12 8FT.

3DQDVRQLF

ORDER No. SM-98019

Summary of Contents for TX-28LD4DP

Page 1: ...rms 1k Selectable output 21 pin AV3 IN Audio RCAx2 500mV rms 10k Video RCAx1 1V p p 75 Dolby Surround Out 5 x Dolby Surround Out RCA Rear External Speaker connections 2 x Rear 1 x Centre 1 x External...

Page 2: ...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...

Page 3: ...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 E BOARD Y BOARD FOCUS SCREEN H BOARD Fig 3 C BOARD K BOARD N BOARD...

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...

Page 5: ...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 6: ...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 wil...

Page 7: ...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 8: ...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 9: ...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 10: ...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 38 Q252 Q251 2 L L 11 HEADPHONE 2 L 3 R 21 DACA_R 22 DACA_L E12 3 4 5 6 7 I2S_DA_IN_2 18 I2S_DA_IN_1 12 I2...

Page 11: ...Audio Left Audio Right Headphone Left Headphone Right Surround Centre Woofer Surround L Centre Surround R JK2402 Woofer Surround L Centre Out Left Front Surround R Right Front Q2427 Q2423 Q2419 Q2418...

Page 12: ...853 74 IC1071 Q1052 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 IN SLO...

Page 13: ...ESSOR AUDIO PROCESSOR VIDEO PROCESSOR EPROM EAROM RESET REG REG REG IC3401 7 VIDEO SWITCHING IC701 6 EW CORRECTION POWER SUPPLY IC451 6 3 1 V OUTPUT AUDIO OUTPUT D801 E BOARD Y BOARD E3 2 Y3 2 N1 2 E1...

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

Page 15: ...66296706 CRT SOCKET S351 0330550049 INSTRUCTION BOOKS ENGLISH TQB8E2470 1 I C s AUDIO OUTPUT IC251 LA4282 R G B AMPLIFIER IC351 TDA6103Q N3 VERTICAL OUTPUT IC451 LA7845N VIDEO PROCESSOR IC601 VDP3108B...

Page 16: ...4 MA723TA5 DIODE D2401 MA165TA5 DIODE D2402 MA165TA5 DIODE D2403 MTZJT 7712C DIODE D2404 MTZJT 7712C DIODE D2405 MTZJT 7712C DIODE D2406 MTZJT 7712C DIODE D2409 MA165TA5 DIODE D2705 EG01CV0 DIODE D270...

Page 17: ...0K COIL L107 TLTACT6R8K COIL L114 ELJFC2R2KF COIL L115 ELJFC2R2KF COIL L301 TLTACT4R7K COIL L302 TLTACT4R7K COIL L451 EXCELSA35T COIL L501 EXCELSA35V COIL L552 ELH5L4105 COIL L553 ELC08D682E COIL L554...

Page 18: ...JSE17 ERJ8GEY0R00 125W 5 0 S M CARB JA56 ERJ8GEY0R00 125W 5 0 S M CARB JA31 ERJ8GEY0R00 125W 5 0 S M CARB JA30 ERJ8GEY0R00 125W 5 0 S M CARB JA8 ERJ8GEY0R00 125W 5 0 S M CARB JA59 ERJ8GEY0R00 125W 5 0...

Page 19: ...3 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 ERJ...

Page 20: ...22 0 1W 5 2K2 S M CARB R1163 ERJ6GEYJ222 0 1W 5 2K2 S M CARB R1164 ERJ6GEYJ332 0 1W 5 3K3 S M CARB R1165 ERJ6GEYJ512 0 1W 5 5K1 S M CARB R1166 ERJ6GEYJ912 0 1W 5 9K1 S M CARB R1167 ERJ6GEYJ100 0 1W 5...

Page 21: ...EYJ102 0 1W 5 1K S M CARB R2523 ERJ6GEYJ681 0 1W 5 680 S M CARB R2524 ERJ6GEYJ681 0 1W 5 680 S M CARB R2525 ERJ6GEYJ104 0 1W 5 100K S M CARB R2526 ERJ6GEYJ104 0 1W 5 100K S M CARB R2527 ERJ6GEYJ332 0...

Page 22: ...UV1H103KBX 50V 10nF S M CAP C124 ECUV1H220JCX 50V 22pF S M CAP C125 ECUV1H100DCX 50V 10pF S M CAP C133 ECUV1H104KBX 50V 10pF S M CAP C134 ECUV1H104KBX 50V 10pF S M CAP C135 ECUV1H104KBW 50V 10pF FILM...

Page 23: ...J 500V 470pF ELECT C856 ECA1AHG222B 10V 470pF CERAMIC C857 ECKC2H471J 500V 470pF ELECT C858 ECEA1HGE102 50V 470pF ELECT C859 ECJ2VF1H104Z 350V 100nF ELECT C860 ECA1HM101GB 50V 100 F ELECT C862 ECJ2VF1...

Page 24: ...A1HM010GB 50V 1 F ELECT C2435 ECA1HM010GB 50V 1 F S M CAP C2436 ECUV1H101JCX 50V 100pF S M CAP C2437 ECUV1H101JCX 50V 100pF ELECT C2438 ECA1HM010GB 50V 1 F ELECT C2439 ECA1HM010GB 50V 1 F S M CAP C244...

Page 25: ...X 50V 560pF S M CAP C3104 ECUV1H561JCX 50V 560pF S M CAP C3105 ECUV1H561JCX 50V 560pF S M CAP C3106 ECUV1H561JCX 50V 560pF ELECT C3107 ECA1HM470GB 50V 47 F ELECT C3108 ECA1HM470GB 50V 47 F S M CAP C31...

Page 26: ...ing 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...

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Page 33: ...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 34: ...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...

Page 35: ...D2 Q2424 C1 Q2423 C1 Q2422 G6 Q2421 G6 Q2420 G5 Q2419 G5 Q2418 G5 Q2417 F4 Q2416 D2 Q2410 D2 Q2409 B4 Q2407 C4 Q2406 C4 Q2405 D2 Q2404 F1 Q2403 D2 Q2402 E1 Q2401 IC S C5 IC2404 A4 IC2403 E5 IC2402 G2...

Page 36: ...2701 F9 DIODES D2720 E6 D2719 H10 D2718 G10 D2717 F3 D2716 F2 D2715 F6 D2714 F5 D2713 F8 D2712 F8 D2711 E7 D2710 C8 D2709 C2 D2708 C3 D2707 D6 D2706 C3 D2705 B5 IC S IC2704 F3 IC2703 F6 IC2702 G8 IC27...

Page 37: ...f Service Aids which have been made available LUCI interface kit Linked Utility Computer Interface Part number TZS6EZ002 This contains interface and cables for connecting TV service connector and a PC...

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