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Panasonic TX-25FG20R Service Manual
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Panasonic TX-25FG20R Service Manual

Panasonic TX-25FG20R Service Manual

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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 110-240V, 50/60Hz
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)
5A, 9A (AUST)
38.0 MHz
TX-25FG20R
GP4 Chassis
Video
199 W
Sound
Colour
Receiving Stereo Sound System
Video/Audio/Terminals
AV 1, 2, 3
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.
© 2005 Matsushita Electric Industrial Co., Ltd. All
rights
distribution is a violation of law.
Order No. MTV0501375C3
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)
(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 (+ -1.0kV) at zero
A59QDF891X Type 25 (59 cm)
Measured diagonally,
717 mm x 502 mm x 530.5 mm
reserved.
Unauthorized
AV STEREO
beam current
104° deflection
16 W speaker
31 kg (Net)
copying
and

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Summary of Contents for Panasonic TX-25FG20R

  • Page 1 Order No. MTV0501375C3 Colour Television TX-25FG20R GP4 Chassis Specification Power Source AC AUTO 110-240V, 50/60Hz Video 31.5 MHz (D, K) / 32.5 MHz (B, G) Power Consumption 199 W 32.0 MHz (I) / 32.5 MHz (M) Standby condition : 2 W Sound 33.57 MHz (PAL) /...

  • Page 2: Table Of Contents

    TX-25FG20R CONTENTS Page Page 1 Safety Precautions 4.3. CONVERGENCE 1.1. General Guide 4.4. WHITE BALANCE (MARKET MODE CHK 4) 1.2. Leakage Current Cold Check 4.5. ADJUSTMENT OF CRT VRS 1.3. Leakage Current Hot Check (See Fig. 1) 5 Conductor Views 1.4.

  • Page 3: Safety Precautions

    TX-25FG20R 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: Gp4 Block Diagram

    TX-25FG20R 1.5. GP4 Block Diagram...

  • Page 5: Service Hints

    TX-25FG20R 2 Service Hints 2.1. HOW TO MOVE CHASSIS INTO SERVICE POSITION. 1. Remove 9 screws. 2. Draw out Main Chassis. 3. Stand the Main Chassis.

  • Page 6: Market Mode Function

    TX-25FG20R 3 Market Mode Function 3.1. Service Mode Access 1. Set timer ON. 2. Press remote’s RECALL and panel’s volume down key simultaneously to enter SERVICE 1. 3.2. Service Mode 1 Controls 1. Key 3 / 4 5. Volume -...

  • Page 7: Adjustment Procedure

    TX-25FG20R 4 Adjustment Procedure 4.1. Adjustment Procedure 4.1.1. +B Voltage 4.1.3. High Voltage Item / preparation Item / preparation 1. Operate the TV set. 1. Receive the crosshatch pattern. 2. Set control as follows : 2. Set to 0 Beam.

  • Page 8: Convergence

    TX-25FG20R vertically. 8. Slowly press the Deflection Yoke and set it where a uniform green field is obtained. 7. Fix the Deflection Yoke by re-inserting the DY wedges. 8. If purity error is found, repeat “Colour Purity” adjustment. 9. Adjust roughly the Low Light controls and make sure that a uniform white field is obtained.

  • Page 9: White Balance (Market Mode Chk 4)

    TX-25FG20R 4.4. WHITE BALANCE (MARKET MODE CHK 4) Preparation 1. Receive a colour bar signal with colour “OFF”, and operate Note: the TV set for more than 30 minutes. Write down the original value for each address adjustment before adjusting anything.

  • Page 10: Adjustment Of Crt Vrs

    TX-25FG20R 4.5. ADJUSTMENT OF CRT VRS NOTE: FOR FLAT CRT ONLY PREPARATION 1. Set DY to CRT not to tilt up and down left and right deflection. 2. Set CY to CRT and set CY magnet primarily. Pur Mg : Set Pur Mg that 2 magnets are (top position) VRS Mag : Set VRS Mg that 2 magnets are (horizontal position) only 21”, 25”...

  • Page 11: Conductor Views 5.1. D-Board

    TX-25FG20R 5 Conductor Views 5.1. D-Board 1/2...
  • Page 12 TX-25FG20R 5.2. D-Board 2/2...

  • Page 13: Schematic Diagrams

    TX-25FG20R 6 Schematic Diagrams 6.1. SCHEMATIC DIAGRAM FOR GP4 CHASSIS...
  • Page 14 TX-25FG20R...

  • Page 15: D Board

    TX-25FG20R 6.2. D Board 6.2.1. D Board (1/5) <A1> <A2> <A3> <A4> <A5> <A6>...
  • Page 16 TX-25FG20R 6.2.2. D Board (2/5) <B1> <A1> <B2> <A2> <A3> <B3> <A4> <B4> <A5> <B5> <A6> <B6>...
  • Page 17 TX-25FG20R 6.2.3. D Board (3/5) <B1> <C1> <B2> <C2> <B3> <B4> <C3> <B5> <C4> <B6> <C5>...
  • Page 18 TX-25FG20R 6.2.4. D Board (4/5) <C1> <D1> <D2> <C2> <D3> <C3> <D4> <C4> <D5> <C5> <D6>...
  • Page 19 TX-25FG20R 6.2.5. D Board (5/5) <D1> <D2> <D3> <D4> <D5> <D6>...

  • Page 20: G Board

    TX-25FG20R 6.3. G Board 6.3.1. G Board (1/4) <A1> <A2> <A3> <A4> <A5> <A6>...
  • Page 21 TX-25FG20R 6.3.2. G Board (2/4) <B1> <A1> <A2> <B2> <A3> <B3> <A4> <B4> <A5> <B5> <A6> <B6>...
  • Page 22 TX-25FG20R 6.3.3. G Board (3/4) <C1> <B1> <B2> <C2> <B3> <C3> <B4> <B5> <C4> <B6>...
  • Page 23 TX-25FG20R 6.3.4. G Board (4/4) <C1> <C2> <C3> <C4>...

  • Page 24: L Board

    TX-25FG20R 6.4. L Board 6.4.1. L Board (1/3) <A1> <A2> <A3> <A4> <A5> <A6>...
  • Page 25 TX-25FG20R 6.4.2. L Board (2/3) <A1> <B1> <A2> <B2> <B3> <A3> <A4> <B4> <A5> <B5> <A6> <B6>...
  • Page 26 TX-25FG20R 6.4.3. L Board (3/3) <B1> <B2> <B3> <B4> <B5> <B6>...

  • Page 27: Parts Locations

    TX-25FG20R 7 Parts Locations...

  • Page 28: Replacement Parts List

    TX-25FG20R 8 Replacement Parts List 8.1. Replacement Parts List Notes...

  • Page 29: Replacement Parts List

    TX-25FG20R 8.2. Replacement Parts List Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks A59QDF891X PICTURE TUBE C2317 F1J1H104A578 C 0.1UF, 50V EASG15S02H2 SPEAKER C2319 F1J1H104A578 C 0.1UF, 50V N2QAJB000080 REMOTE CONTROL C2320...
  • Page 30 TX-25FG20R Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C504 ECJ2VB1H681K C 680PF, K, 50V C808 ECKWAE472ZED C 4700PF, Z,500V C507 ECJ2VF1C105Z C 1UF, Z, 16V C809 ECKWAE472ZED C 4700PF, Z,500V C511...
  • Page 31 TX-25FG20R Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks D362 B0AACK000004 DIODE L2301 J0JKA0000038 BEAD CORE D363 B0AACK000004 DIODE L2302 J0JKA0000038 BEAD CORE D364 B0AACK000004 DIODE L2304 J0JKA0000038 BEAD CORE D365 B0AACK000004...
  • Page 32 TX-25FG20R Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks Q4850 B1ADDF000005 TRANSISTOR R1203 ERJ6GEY0R00 M 0OHM,J,1/10W Q501 2SC4212H TRANSISTOR R1204 ERJ6GEY0R00 M 0OHM,J,1/10W Q520 2SB0792A0L TRANSISTOR R1228 ERJ6GEYJ220 M 22OHM,J,1/10W Q551 2SC5902000LK...
  • Page 33 TX-25FG20R Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R311 D0AE181JA046 C 180OHM,J,1/4W R602 ERJ6GEYJ103 M 10KOHM,J,1/10W R312 D0AE181JA046 C 180OHM,J,1/4W R603 ERJ6GEYJ471 M 470OHM,J,1/10W R3140 ERJ6GEY0R00 M 0OHM,J,1/10W R606 ERJ6GEYJ752 M 7.5KOHM,J,1/10W...
  • Page 34 TX-25FG20R Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R853 ERJ6GEYJ101 M 100OHM,J,1/10W JA19 ERJ6GEY0R00 M 0OHM,J,1/10W R854 ERJ6GEYJ103 M 10KOHM,J,1/10W ERJ6GEY0R00 M 0OHM,J,1/10W R862 ERDS2TJ182 C 1.8KOHM,J, 1/4W JA20 ERJ6GEY0R00 M 0OHM,J,1/10W...

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