Panasonic TX-25P92X Service Manual
Panasonic TX-25P92X Service Manual

Panasonic TX-25P92X Service Manual

Mx-12 chassis
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Specification
Power Source
Power Consumption
Aerial Terminal
Tuning System
Receiving System
Receiving Channels
VHF BAND
UHF BAND
CATV
Intermediate Frequency
AC Auto 110-240 V, 50/60 Hz
Standby condition : 2 W
Impedance : 75Ω, Coaxial type
Frequency Synthesizer
Auto Search Tuning
Pos : 100 Positions
17 Systems
Regular TV
2-12 (PAL/SECAM B, K1)
0-12 (PAL B AUST.)
1-9 (PAL B N.Z.)
1-12 (PAL/SECAM D)
1-12 (NTSC M Japan)
2-13 (NTSC M U.S.A)
21-69 (PAL G, H, I/SECAM G, K, K1)
28-69 (PAL B AUST.)
13-57 (PAL D, K)
13-62 (NTSC M Japan)
14-69 (NTSC M U.S.A.)
S1-S20 (OSCAR)
1-125 (U.S.A. CATV)
C13-C49 (JAPAN)
S21-S41 (HYPER)
Z1-Z37 (CHINA)
38.0 MHz
TX-25P92X
MX-12 Chassis
Video
139 W
Sound
Colour
Receiving Stereo Sound System
Video/Audio/Terminals
AV 1, 2, 3, 4
Y / P
/ P
B
R
Monitor Out
High Voltage
Picture Tube
Audio Output
Dimensions (W x D x H)
Weight (Mass)
Note:
Specifications are subject to change without notice. Mass and
dimensions shown are approximate.
© 2003 Matsushita Electric Industrial Co., Ltd. All
rights
distribution is a violation of law.
Order No. MTV0308233C3
Colour Television
31.5 MHz (D, K) / 32.5 MHz (B, G)
32.0 MHz (I) / 32.5 MHz (M)
33.57 MHz (PAL) /
33.6 MHz (SECAM)
34.42 MHz (NTSC) /
33.75 MHz (SECAM)
QUADRA STEREO
IN S-Video Y:1.0Vp-p 75Ω
DVD IN S-Video C:0.3Vp-p 75Ω
(Phone Type) Y:1.0Vp-p 75Ω PB,
PR:0.7Vp-p 75Ω Video 1.0Vp-p
75Ω Audio Approx. 400mV 47KΩ
Video 1.0Vp-p 75Ω
Audio Approx. 400mV 47KΩ
30.0 ±1.0V at zero
A60LUQ086X Type 25 (60 cm)
Measured diagonally,
650 mm x 471 mm x 530 mm
reserved.
Unauthorized
beam current
104° deflection
20 W speaker
37 kg (Net)
copying
and

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Summary of Contents for Panasonic TX-25P92X

  • Page 1 Order No. MTV0308233C3 Colour Television TX-25P92X MX-12 Chassis Specification Power Source AC Auto 110-240 V, 50/60 Hz Video 31.5 MHz (D, K) / 32.5 MHz (B, G) Power Consumption 139 W 32.0 MHz (I) / 32.5 MHz (M) Standby condition : 2 W Sound 33.57 MHz (PAL) /...
  • Page 2: Table Of Contents

    TX-25P92X CONTENTS Page Page 1 Safety Precautions 5.7. NTSC COLOUR OUTPUT 1.1. General Guide 5.8. COLOUR PURITY 1.2. Leakage Current Cold Check 5.9. CONVERGENCE 1.3. Leakage Current Hot Check (See Fig. 1) 5.10. WHITE BALANCE (MARKET MODE CHK 3) 1.4. X-Radiation 6 Conductor Views 1.5.
  • Page 3: Safety Precautions

    TX-25P92X 1 Safety Precautions 1.3. Leakage Current Hot Check (See Fig. 1) 1.1. General Guide 1. Plug the AC cord directly into the AC outlet. Do not use an 1. It is advisable to insert an isolation transformer in the AC isolation transformer for this check.
  • Page 4: Block Diagram

    TX-25P92X 1.5. MX-12 Block Diagram...
  • Page 5: Location Of Controls And Circuit Boards

    TX-25P92X 2 Location of Controls and Circuit Boards 2.1. REAR VIEW 2.2. LOCATION AND FUNCTION NAME OF CIRCUIT BOARD...
  • Page 6: Service Hints

    TX-25P92X 3 Service Hints 3.1. HOW TO MOVE CHASSIS INTO SERVICE POSITION. 1. Remove 9 screws. 2. Draw out Main Chassis. 3. Stand the Main Chassis.
  • Page 7: Market Mode Function

    TX-25P92X 4 Market Mode Function Outline: MPU controls the functions switching for each ICs through IIC bus in this chassis. The following setting and adjustment can be adjusted by remote control in Market Mode. 1. Selection of Market Mode Adjust the VOLUME “zero” and set OFF TIMER Button to 30 min. Then, simultaneously press the RECALL Button on the remote control and the VOLUME DOWN button - the TV set.
  • Page 8: Adjustment Procedure

    TX-25P92X 5 Adjustment Procedure 5.1. B VOLTAGE Item/Preparation Adjustment Procedure 1. Operate the TV set. 1. Confirm that the indicated test points for the specified voltage: TPA 140 : 141 ± 2V 2. Set controls : (MARKET MODE CHK 2) TPA 12 : 12 ±...
  • Page 9: Pal Colour Output

    TX-25P92X 5.6. PAL COLOUR OUTPUT Item/Preparation Adjustment Procedure 1. Receive PAL colour bar pattern. 1. Adjust Bright Control. a = 2.3 ± 0.5Vp-p 2. Connect an oscilloscope probe to TPA 37 or TPL2 (G OUT). 2. Adjust Sub Colour control.
  • Page 10: Colour Purity

    TX-25P92X Before Colour Purity, Convergence and White Balance adjustments are attempted, V. Center, V. Height, H. Width, H. Center and Focus adjustments must be completed. 5.8. COLOUR PURITY 2. Adjust Bright control to obtain a clear pattern. 3. Adjust Red and Blue line at center of the screen.
  • Page 11: White Balance (Market Mode Chk 3)

    TX-25P92X 5.10. WHITE BALANCE (MARKET MODE CHK 3) Preparation 1. Receive a colour bar signal with colour “OFF”, and operate the TV set for more than 30 minutes. 2. Set the picture menu to “DYNAMIC NORMAL” and the AI to off.
  • Page 12: Conductor Views

    TX-25P92X 6 Conductor Views 6.1. A-Board...
  • Page 13: Schematic Diagrams

    TX-25P92X 7 Schematic Diagrams 7.1. SCHEMATIC DIAGRAM FOR MODEL (MX-12 CHASSIS)
  • Page 14 TX-25P92X...
  • Page 15: Gm Board

    TX-25P92X 7.2. GM BOARD 7.2.1. GM BOARD 1/2 <1A> <2A> <3A> <4A> <5A>...
  • Page 16 TX-25P92X 7.2.2. GM BOARD 2/2 <1A> <2A> <3A> <4A> <5A>...
  • Page 17: A Board

    TX-25P92X 7.3. A BOARD 7.3.1. A BOARD 1/4 <1A> <2A> <3A> <4A> <5A> <6A> <7A> <8A> <9A> <10A> <11A> <12A> <13A> <14A> <15A> <16A> <17A> <18A> <19A>...
  • Page 18 TX-25P92X 7.3.2. A BOARD 2/4 <1A> <1B> <2A> <2B> <3A> <4A> <3B> <4B> <5A> <6A> <7A> <5B> <6B> <7B> <8A> <9A> <8B> <10A> <9B> <11A> <10B> <11B> <12B> <13B> <14B> <12A> <13A> <15B> <14A> <15A> <16A> <17A> <16B> <17B> <18A>...
  • Page 19 TX-25P92X 7.3.3. A BOARD 3/4 <1B> <1C> <2C> <2B> <3C> <4C> <3B> <5C> <6C> <4B> <7C> <8C> <5B> <6B> <7B> <8B> <9C> <9B> <10B> <10C> <11B> <12B> <13B> <14B> <11C <15B> <12C> <16B> <13C> <17B> <18B> <19B>...
  • Page 20 TX-25P92X 7.3.4. A BOARD 4/4 <1C> <2C> <3C> <4C> <5C> <6C> <7C> <8C> <9C> <10C> <11C <12C> <13C>...
  • Page 21: H Board

    TX-25P92X 7.4. H BOARD 7.4.1. H BOARD 1/2 <1A> <2A> <3A> <4A> <5A> <6A> <7A> <8A> <9A> <10A> <11A> <12A> <13A> <14A> <15A> <16A> <17A> <18A> <19A> <20A> <21A> <22A> <23A>...
  • Page 22 TX-25P92X 7.4.2. H BOARD 2/2 <1A> <2A> <3A> <4A> <5A> <6A> <7A> <8A> <9A> <10A> <11A> <12A> <13A> <14A> <15A> <16A> <17A> <18A> <19A> <20A> <21A> <22A> <23A>...
  • Page 23: Yc Board

    TX-25P92X 7.5. YC BOARD 7.5.1. YC BOARD 1/2 <1A> <2A> <3A> <4A> <5A> <6A> <7A> <8A> <9A> <10A> <11A> <12A> <13A> <14A> <15A> <16A>...
  • Page 24 TX-25P92X 7.5.2. YC BOARD 2/2 <1A> <2A> <3A> <4A> <5A> <6A> <7A> <8A> <9A> <10A> <11A> <12A> <13A> <14A> <15A> <16A>...
  • Page 25: L Board

    TX-25P92X 7.6. L BOARD 7.6.1. L BOARD 1/3 <1A> <2A> <3A> <4A> <5A>...
  • Page 26 TX-25P92X 7.6.2. L BOARD 2/3 <1A> <1B> <2A> <2B> <3A> <3B> <4B> <4A> <5B> <6B> <7B> <5A> <8B>...
  • Page 27 TX-25P92X 7.6.3. L BOARD 3/3 <1B> <2B> <3B> <4B> <5B> <6B> <7B> <8B>...
  • Page 28: Board

    TX-25P92X 7.7. X BOARD 7.7.1. X BOARD 1/3 <1A> <2A> <3A> <4A> <5A> <6A> <7A> <8A>...
  • Page 29 TX-25P92X 7.7.2. X BOARD 2/3 <1A> <1B> <2B> <2A> <3B> <3A> <4B> <4A> <5B> <5A> <6A> <6B> <7B> <8B> <9B> <7A> <8A> <10B>...
  • Page 30 TX-25P92X 7.7.3. X BOARD 3/3 <1B> <2B> <3B> <4B> <5B> <6B> <7B> <8B> <9B> <10B>...
  • Page 31: T Board

    TX-25P92X 7.8. T BOARD 7.8.1. T BOARD 1/2 <1A> <2A> <3A> <4A> <5A> <6A> <7A> <8A> <9A>...
  • Page 32 TX-25P92X 7.8.2. T BOARD 2/2 <1A> <2A> <3A> <4A> <5A> <6A> <7A> <8A> <9A>...
  • Page 33: Parts Locations

    TX-25P92X 8 Parts Locations...
  • Page 34: Replacement Parts List

    TX-25P92X 9 Replacement Parts List 9.1. Replacement Parts List Notes...
  • Page 35 TX-25P92X Ref. No. Part No. Part Name & Description Remarks 9.1.1. Replacement Part List R601 ERJ6GEYJ333 M 33KOHM,J,1/10W R602 ERJ6GEYJ682 M 6.8KOHM,J,1/10W Ref. No. Part No. Part Name & Description Remarks R610 ERJ6GEYJ101 M 100OHM,J,1/10W A60LUQ086X PICTURE TUBE R611 ERJ6GEYJ101...
  • Page 36 TX-25P92X Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks R1112 ERJ6GEYJ152 M 1.5KOHM,J,1/10W R3508 ERJ6GEYJ301 M 300OHM,J,1/10W R1120 ERDS2TJ101 C 100OHM,J, 1/4W R3509 ERJ6GEYJ301 M 300OHM,J,1/10W R1121 ERDS2TJ472 C 4.7KOHM,J, 1/4W...
  • Page 37 TX-25P92X Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks C103 ECQV1H224JL P 0.22UF, J, 50V C841 ECKCNA102MB7 C 1000PF, M, C110 ECJ2VF1H104Z C 0.1UF, Z, 50V C842 ECKCNA102MB7 C 1000PF, M,...
  • Page 38 TX-25P92X Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks C3056 ECJ2VB1C104K C 0.1UF, K, 16V L801 TLP4GD016P LINE FILTER C3062 ECJ2VB1H682K C 6800PF, K, 50V L802 TLP4GD016P LINE FILTER C3063...
  • Page 39 TX-25P92X Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks D851 FMLG12S DIODE JA56 ERJ6GEY0R00 M 0OHM,J,1/10W D852 AG01Z DIODE JA60 ERJ6GEY0R00 M 0OHM,J,1/10W D853 RU4AMLF-M1 DIODE JA61 ERJ6GEY0R00 M 0OHM,J,1/10W...
  • Page 40 TX-25P92X Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks R364 ERC12GK222 S 2.2KOHM,K, 1/2W R830 ERDS2TJ221 C 220OHM,J, 1/4W R365 ERC12GK222 S 2.2KOHM,K, 1/2W R831 ERDS2TJ273 C 27KOHM,J, 1/4W R369...
  • Page 41 TX-25P92X Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks R3014 ERJ6GEYJ683 M 68KOHM,J,1/10W R5521 ERJ6GEYJ222 M 2.2KOHM,J,1/10W R3015 ERJ6GEYJ223 M 22KOHM,J,1/10W R5522 ERJ6GEYJ561 M 560OHM,J,1/10W R3016 ERJ6GEYJ681 M 680OHM,J,1/10W R5525 ERJ6GEYJ222 M 2.2KOHM,J,1/10W...
  • Page 42 TX-25P92X Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks C625 ECJ2VF1H104Z C 0.1UF, Z, 50V C2132 ECJ2VB1C104K C 0.1UF, K, 16V C630 ECJ2VF1H103Z C 0.01UF, Z, 50V C2133 ECJ2VB1C104K C 0.1UF, K, 16V...
  • Page 43 TX-25P92X Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks C5553 ECEA0JKA331 E 330UF, 6.3V D865 AG01Z DIODE C5554 ECEA0JKA221 E 220UF, 6.3V D870 MTZJ3.6A ZENER DIODE C5555 ECEA1CKA101 E 100UF, 16V...
  • Page 44 TX-25P92X Ref. No. Part No. Part Name & Description Remarks Q5585 2SB709ATX TRANSISTOR OTHERS K1KB08A00054 8P CONNECTOR K1KB09A00027 CONNECTOR K1YB40000003 CONNECTOR TJS118590 2P CONNECTOR TJS118590 2P CONNECTOR TJS4G8020 16P CONNECTOR TJS4G8020 16P CONNECTOR TJS3A9650 4P CONNECTOR TJS118590 2P CONNECTOR TJS118590...

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