Panasonic TX-25LK1P Service Manual

Panasonic TX-25LK1P Service Manual

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SPECIFICATION
(Information in brackets { } refers to model TX-25LK1P)
Power Source:
Power Consumption:
Stand-by Power
Consumption:
Aerial Impedance:
Receiving System:
Receiving Channels:
VHF E2-E12
VHF A-H (ITALY)
VHF R3-R5
UHF E21-E69
CATV S1-S10 (M1-M10)
CATV S21-S41 (HYPERBAND)
Intermediate Frequency:
Video/Audio
Video
Audio
Colour
Terminals:
AV1 IN
220-240V a.c., 50Hz
97W {105W}
0,9W
75Ω unbalanced, Coaxial Type
PAL B/G, PAL D/K ,PAL-60
SECAM B/G, SECAM D/K
M.NTSC (AV)
NTSC (AV only)
VHF H1-H2 (ITALY)
VHF R1-R2
VHF R6-R12
CATV (S01-S05)
CATV S11-S20 (U1-U10)
38,9MHz
32,4MHz, 32,66MHz (A2
CZECH)
33,05MHz (NICAM)
33,4MHz, 33,16MHz (A2)
33,05MHz (NICAM B/G)
34,47MHz
34,5MHz, 34,65MHz
Video(21 pin) 1V p-p 75Ω
Audio(21 pin) 500mV rms 10kΩ
RGB (21 pin) 0,7V p-p 75Ω

Colour Television

AV1 OUT
Video (21 pin) 1V p-p 75Ω
Audio (21 pin) 500mV rms 1kΩ
RCA IN
Video
RCA IN
Audio
High Voltage:
28kV ± 1kV
Picture Tube:
A66ECF50X04
{A59EEQ15X97 59cm}
Audio Output:
2 x 10W (M.P.O.)
2 x 5W (R.M.S.)
8Ω Impedance
Headphones:
8Ω Impedance
3,5mm
Accessories
supplied :
Remote Control
2 x R6 (UM3) Batteries
Dimensions:
Height:
571mm
Width:
778mm
Depth:
478mm
Net weight:
31,5kg
Specifications are subject to change without notice.
Weights and dimensions shown are approximate.
NOTE:
This Service Manual should be used in
conjunction with the Z8 Technical guide.
ORDER No. 00-SM-016
TX-28LK1P
TX-25LK1P
Z8 Chassis
1V p-p 75Ω
500mV rms 10kΩ
66cm
{522mm}
{718mm}
{464mm}
{26,75kg}

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Summary of Contents for Panasonic TX-25LK1P

  • Page 1: Colour Television

    ORDER No. 00-SM-016 Colour Television TX-28LK1P TX-25LK1P Z8 Chassis SPECIFICATION (Information in brackets { } refers to model TX-25LK1P) AV1 OUT Video (21 pin) 1V p-p 75Ω Power Source: 220-240V a.c., 50Hz Audio (21 pin) 500mV rms 1kΩ Power Consumption:...
  • Page 2: Table Of Contents

    CONTENTS SAFETY PRECAUTIONS................................2 SERVICE HINTS ..................................3 ADJUSTMENT PROCEDURE AND FACTORY SETTINGS .....................4 WAVEFORM PATTERN TABLE ...............................5 ALIGNMENT SETTINGS................................6 BLOCK DIAGRAMS ..................................7 PARTS LOCATION .................................10 REPLACEMENT PARTS LIST ..............................11 SCHEMATIC DIAGRAMS ...............................17 CONDUCTOR VIEWS................................20 SAFETY PRECAUTIONS GENERAL GUIDE LINES It is advisable to insert an isolation transformer in the Check each exposed metallic part and check the a.c.
  • Page 3: Service Hints

    SERVICE HINTS How to remove the rear cover Remove the 6 screws as shown in Fig.2. Screws Fig.2. LOCATION OF CONTROLS Focus E - Board Y - Board Screen Fig.3.
  • Page 4: Adjustment Procedure And Factory Settings

    ADJUSTMENT PROCEDURE Item/Preparation Adjustments +B SET-UP Confirm the following voltages. 1. Receive a Greyscale signal. TPE1 ± 0,3V TPE13 -13 ± 1V 2. Set the controls: TPE2 ± 10V TPE14 27,5 ± 1,5V Brightness Minimum TPE3 13,5 ± 1V TPE15 28 ±...
  • Page 5: Waveform Pattern Table

    WAVEFORM PATTERN TABLE IC 601 IC 451 IC 451 VERT - OUT VERT - DRIVE VFLB Pin 21 Pin 2 Pin 3 20ms 20ms 20ms IC 601 IC 701 Base Q501 H - OUT H - PULSE EW - OUT Pin 33 Pin 5 64µs...
  • Page 6: Alignment Settings

    ALIGNMENT SETTINGS To access Service Mode select program position 99 and set sharpness to minimum. Press “MUTE” button on remote control and at the same time press the "V" button on the customer controls at the front of the TV, this will place the TV set into Service Mode. ∧...
  • Page 7: Block Diagrams

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  • Page 10: Parts Location

    PARTS LOCATION NOTE: The numbers on the exploded view below refer to the exploded view section of the Replacement Parts List.
  • Page 11 5(3/$&(0(17 3$576 /,67 ,PSRUWDQW 6DIHW\ 1RWLFH 8‚€ƒ‚r‡†ÃDqr‡vsvrqÃi’ÃÃÃÃÃÃÃÀh…xÃuh‰rƃrpvhyÃpuh…hp‡r…v†‡vp†Ãv€ƒ‚…‡h‡Ãs‚…Æhsr‡’ ÃXurÃ…rƒyhpvtÃh’ÂsÇur†rÃp‚€ƒ‚r‡†Ȇry’Àhˆshp‡ˆ…r…†Ã†ƒrpvsvrqÃh…‡† DÃph†rÂsÂ…qr…vtÇur†rƃh…rÃh…‡†Ãyrh†rÃhyh’†ÃhqqÇurÃp‚€ƒyr‡rÃH‚qryU’ƒrà ˆ€ir…Ç‚Ã’‚ˆ…Â…qr… 8p‡ÃSrs Qh…‡†ÃIˆ€ir… 9r†p…vƒ‡v‚ 8p‡ÃSrs Qh…‡†ÃIˆ€ir… 9r†p…vƒ‡v‚ 9DP9@T &20021 3$576 9! HUaEU&& %6 9DP9@à 9" HUaEU&& %6 9DP9@à 9!% H6!(X6U6 9DP9@à @YQGP9@9ÃWD@X HUaEU&&"(8 9DP9@à ÃÃÃÃà @6TB !9$$!6! TQ@6F@Sà 9!%! HUaEU&&"(8 9DP9@à ÃÃÃÃÃ! @IW$&9"&B"...
  • Page 12 8p‡ÃSrs Qh…‡†ÃIˆ€ir… 9r†p…vƒ‡v‚ 8p‡ÃSrs Qh…‡†ÃIˆ€ir… 9r†p…vƒ‡v‚ 9' " HUaEU&&!9 9DP9@à G'$! @Y8@GT6"$U 8PDG 9' # HUaEU&&$%6 9DP9@ÃÃà G'$" @Y8@GT6"$U 8PDG UWTSV"6HGA6$ 9DP9@ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃà U6GW"$W7"" F 8PDGà 9'$! UWTSV"6HGA6$ 9DP9@ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃà G! U6GW"$W7#S&F 8PDGà 9'$" TS !##6U'! 9DP9@ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃà G!! U6GW"$W7#S&F 8PDGà HUaEU&&%!6 9DP9@ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃà G!# @Y8@GT6"$U 8PDG...
  • Page 13 8p‡ÃSrs Qh…‡†ÃIˆ€ir… 9r†p…vƒ‡v‚ 8p‡ÃSrs Qh…‡†ÃIˆ€ir… 9r†p…vƒ‡v‚ ET@" @SE%B@`S TH86S7  X $È S%" @SE%B@`E"(" TH86S7  X $È "(F ET@"" @SE%B@`S TH86S7  X $È S%# @SE%B@`E  TH86S7  X $È ET@"& @SE%B@`S TH86S7  X $È S%$ @SE%B@`E  TH86S7  X $È...
  • Page 14 8p‡ÃSrs Qh…‡†ÃIˆ€ir… 9r†p…vƒ‡v‚ 8p‡ÃSrs Qh…‡†ÃIˆ€ir… 9r†p…vƒ‡v‚ S'$ @S9T UE " 86S7PI $X $È S!# @SE%B@`E!!! TH86S7  X $È S'% @S9T UE""! 86S7PI $X $È "F" S!& @SE%B@`E " TH86S7  X $È S'( @SX!QFS""ÃÃà XPVI9 !È S"" S!' @SE%B@`E  TH86S7  X $È...
  • Page 15 8p‡ÃSrs Qh…‡†ÃIˆ€ir… 9r†p…vƒ‡v‚ 8p‡ÃSrs Qh…‡†ÃIˆ€ir… 9r†p…vƒ‡v‚ 8"$# @8E!WA C #a @G@8U "$W ÃÃà A 8%$" @8E!`7 C%'"F @G@8U à %'A 8"$% @8VW C !aAY THÃ86Q ÃÃà A 8%$# @8E!W7 C "F @G@8U "$W ÃÃà A 8"$& @8F8"9 $!E 8@S6HD8à $A 8& @86 CH 7 @G@8U...
  • Page 16 8p‡ÃSrs Qh…‡†ÃIˆ€ir… 9r†p…vƒ‡v‚ 8p‡ÃSrs Qh…‡†ÃIˆ€ir… 9r†p…vƒ‡v‚ 8! ( @8@6 CV  @G@8UÃÃà —A D8† 8!! @8RW C#&#EG" ADGH à #&A " YQF! FQa @6SPHÃÃÃÃÃÃÃÃÃÃÃà 8!! @8RW C#&#EG" ADGH à #&A 8PDGT 8!!! @8VW C!! E8Y THÃ86Q !!ƒA @GC$G# 8PDGà 8!!" @8VW C!! E8Y THÃ86Q !!ƒA...
  • Page 17: Schematic Diagrams

    SCHEMATIC DIAGRAMS FOR MODELS TX-28LK1P, TX-25LK1P (Z8 CHASSIS) IMPORTANT SAFETY NOTICE Components identified by mark have special characteristics important for safety. When replacing any of these components, use only manufacturers' specified parts. NOTE RESISTOR All resistors are carbon ¼W resistor, unless marked otherwise.
  • Page 20: Conductor Views

    CONDUCTOR VIEWS FOR MODELS TX-28LK1P, TX-25LK1P E - BOARD TNP8EE011 TRAN'S DIODES D852 Q253 D002 D853 Q255 D003 D1101 B5 Q401 D260 D1104 A1 Q402 D261 D1106 A2 Q501 D262 D1107 A3 Q551 D401 D1201 A3 Q601 D402 D1202 A3...
  • Page 21 Y - BOARD TNP8EY015 TRAN'S Q351 DIODES D350 D351 D352 D353 D370 D371 D372 D373 T.P.'S TPY4 TPY5 I.C.'S IC351...
  • Page 22 NOTES...

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