Panasonic TX-21FG25R Service Manual
Panasonic TX-21FG25R Service Manual

Panasonic TX-21FG25R Service Manual

Colour television

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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 160-240 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)
5A, 9A (AUST)
38.0 MHz
TX-21FG25R
GP4N Chassis
Video
96 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. MTV0501371C3
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
A51LXR195X Type 21 (51 cm)
Measured diagonally,
648 mm x 488 mm x 472 mm
reserved.
Unauthorized
AV STEREO
27.5±1.5 at zero
beam current
104° deflection
16 W speaker
24 kg (Net)
copying
and

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Summary of Contents for Panasonic TX-21FG25R

  • Page 1 Order No. MTV0501371C3 Colour Television TX-21FG25R GP4N Chassis Specification Power Source AC Auto 160-240 V, 50/60 Hz Video 31.5 MHz (D, K) / 32.5 MHz (B, G) Power Consumption 96 W 32.0 MHz (I) / 32.5 MHz (M) Standby condition : 2 W Sound 33.57 MHz (PAL) /...
  • Page 2: Table Of Contents

    TX-21FG25R 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-21FG25R 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: Service Hints

    TX-21FG25R 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 5: Market Mode Function

    TX-21FG25R 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. Set to normal mode : Press the volume down button on front, together press the off timer button on remote control.
  • Page 6: Adjustment Procedure

    TX-21FG25R 4 Adjustment Procedure 4.1. Adjustment Procedure 4.1.1. +B Voltage 4.1.3. NTSC TINT COLOUR Item / preparation 1. Operate the TV set. Item / preparation 2. Set control as follows : 1. Connect oscilloscope probe to TPL1 (R OUT) with 10kΩ...
  • Page 7: Convergence

    TX-21FG25R 4.3. CONVERGENCE 1. Apply a crosshatch pattern signal and set Contrast control to the maximum position. 2. Adjust Bright control to obtain a clear pattern. 3. Adjust Red and Blue line at center of the screen. 4. Adjust Red and Blue with Green line at center of the screen by rotating (RB)-G static convergence magnet.
  • Page 8: White Balance (Market Mode Chk 4)

    TX-21FG25R 4.4. WHITE BALANCE (MARKET MODE CHK 4) 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 9: Adjustment Of Crt Vrs

    TX-21FG25R 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 10: Conductor Views

    TX-21FG25R 5 Conductor Views 5.1. D Board...
  • Page 11: Schematic Diagrams

    TX-21FG25R 6 Schematic Diagrams 6.1. SCHEMATIC DIAGRAM FOR GP4 CHASSIS...
  • Page 12 TX-21FG25R...
  • Page 13: A Board

    TX-21FG25R 6.2. A Board 6.2.1. A Board (1/5) <1A> <2A> <3A> <4A> <5A> <6A> <7A> <8A> <9A>...
  • Page 14 TX-21FG25R 6.2.2. A Board (2/5) <1A> <1B> <2A> <2B> <3A> <4A> <5A> <3B> <6A> <7A> <4B> <8A> <5B> <6B> <7B> <8B> <9A> <9B>...
  • Page 15 TX-21FG25R 6.2.3. A Board (3/5) <1B> <1C> <2B> <2C> <3B> <4B> <3C> <5B> <4C> <6B> <5C> <7B> <6C> <7C> <8B> <8C> <9B> <9C>...
  • Page 16 TX-21FG25R 6.2.4. A Board (4/5) <1C> <1D> <2C> <2D> <3D> <4D> <5D> <6D> <7D> <3C> <8D> <4C> <9D> <5C> <6C> <7C> <8C> <9C>...
  • Page 17 TX-21FG25R 6.2.5. A Board (5/5) <1D> <2D> <3D> <4D> <5D> <6D> <7D> <8D> <9D>...
  • Page 18: L Board

    TX-21FG25R 6.3. L Board 6.3.1. L Board (1/3) <1A> <2A> <3A> <4A> <5A> <6A> <7A>...
  • Page 19 TX-21FG25R 6.3.2. L Board (2/3) <1A> <1B> <2B> <2A> <3A> <3B> <4A> <4B> <5A> <5B> <6B> <6A> <7A> <7B>...
  • Page 20 TX-21FG25R 6.3.3. L Board (3/3) <1B> <2B> <3B> <4B> <5B> <6B> <7B>...
  • Page 21: Pp Board

    TX-21FG25R 6.4. PP Board 6.4.1. PP Board (1/3) <1A> <2A> <3A> <4A> <5A> <6A> <7A>...
  • Page 22 TX-21FG25R 6.4.2. PP Board (2/3) <1A> <1B> <2B> <2A> <3A> <4A> <3B> <4B> <5A> <5B> <6A> <6B> <7A> <7B>...
  • Page 23 TX-21FG25R 6.4.3. PP Board (3/3) <1B> <2B> <3B> <4B> <5B> <6B> <7B>...
  • Page 24: Parts Locations

    TX-21FG25R 7 Parts Locations...
  • Page 25: Replacement Parts List

    TX-21FG25R 8 Replacement Parts List 8.1. Replacement Parts List Notes...
  • Page 26: Replacement Parts List

    TX-21FG25R 8.2. Replacement Parts List Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks A51LXR195X PICTURE TUBE C1831 ECUX1H104KBX C 0.1UF, K, 50V EASG15S02H2 SPEAKER C1832 ECA1CM221B E 220UF, 16V N2QAJB000144 REMOTE CONTROL...
  • Page 27 TX-21FG25R Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C502 ECKR3A182KBP C 1800PF, K, 1KV C809 ECKWAE472ZED C 4700PF, Z,500V C503 ECKR3A182KBP C 1800PF, K, 1KV C810 F2B2G2710010 ELECTROLYTIC CAPACITOR C504 ECJ2VB1H681K...
  • Page 28 TX-21FG25R Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks D556 ERB06-15 DIODE L554 G0A682AA0006 PEAKING COIL D557 B0HAMQ000001 DIODE L557 G0D820000005 LINEARITY COIL D558 MA185 DIODE L561 J0JKB0000034 EMI FILTER D560 B0EAKR000022...
  • Page 29 TX-21FG25R Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R1030 ERJ6ENF2152 M21.5KOHM, 1/10W R3026 ERJ6GEYJ103 M 10KOHM,J,1/10W R1031 ERJ6ENF2321 FIXED RESISTOR R303 ERJ6GEYJ103 M 10KOHM,J,1/10W R104 ERJ6GEYJ121 M 120OHM,J,1/10W R304 ERJ6GEYJ240 FIXED RESISTOR...
  • Page 30 TX-21FG25R Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R601 ERJ6GEYJ470 M 47OHM,J,1/10W R884 ERJ6GEYJ562 M 5.6KOHM,J,1/10W R602 ERJ6GEYJ103 M 10KOHM,J,1/10W R885 ERJ6GEYJ752 M 7.5KOHM,J,1/10W R604 ERJ6GEYJ470 M 47OHM,J,1/10W R886 ERJ6GEYJ433 M 43KOHM,J,1/10W...
  • Page 31 TX-21FG25R Ref. Part No. Part Name & Description Remarks RL801 K6B1CDA00029 RELAY RM1062 B3RAC0000013 REMOCON RECEIVER SC351 K3B122A00001 CRT SOCKET SW1011 EVQ11G05R SWITCH SW1012 EVQ11G05R SWITCH SW1013 EVQ11G05R SWITCH SW1014 EVQ11G05R SWITCH SW1015 EVQ11G05R SWITCH SW1016 EVQ11G05R SWITCH SW840 ESB92DA1B...

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