Panasonic TC-21FG20P Service Manual
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Panasonic TC-21FG20P Service Manual

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Specifications

Power Source :
Power Consumption :
Aerial Impedance :
Receiving Channels :
VHF
CATV
UHF
Intermediate Frequency :
Video
Sound
Colour
AC AUTO 110-240V, 50/60 Hz
83W
75Ω unbalanced
Coaxial type
2-13 (USA STANDARD)
1-125 (USA STANDARD)
14-69 (USA STANDARD)
38.0 MHz
31.5 MHz (D, K, K1)
32 MHz (I)
32.5 MHz (B, G)
33.5 MHz (M)
33.57 MHz (PAL)
33.6 MHz (SECAM)
33.75 MHz (SECAM)
34.42 MHz (NTSC)
TC-21FG20P
GP31 Chassis
Video / Terminals :
RAV In
Monitor Out
High Voltage :
Picture Tube :
Audio Output :
Dimensions :
Mass :
Specifications are subject to change without notice.
Mass and dimensions shown are approximate.
© 2005 Matsushita Electric Industrial Co., Ltd. All
rights
reserved.
distribution is a violation of law.
ORDER NO. MTV0501396C3

Colour Television

AV1, 2
Video In 1 Vp-p 75Ω
Audio In Approx. 400mVrms
Video Out 1 Vp-p 75Ω
Audio Out Approx. 400mVrms
27.5kV±1.5
at zero beam current
A51LXR195X
51cm (21 inches)
Measured diagonally,
90° deflection
16.0W
Height : 473 mm
Width : 648 mm
Depth : 488 mm
24 kg (Net Wt.)
Unauthorized
copying
and

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Summary of Contents for Panasonic TC-21FG20P

  • Page 1: Colour Television

    ORDER NO. MTV0501396C3 Colour Television TC-21FG20P GP31 Chassis Specifications Power Source : AC AUTO 110-240V, 50/60 Hz Video / Terminals : AV1, 2 Power Consumption : RAV In Video In 1 Vp-p 75Ω Aerial Impedance : 75Ω unbalanced Audio In Approx. 400mVrms...

  • Page 2: Table Of Contents

    CONTENTS Page Page 1 Safety Precautions 2.5. Adjustment Procedure 1.1. General Guide Lines 2.6. PAL Colour 1.2. Leakage Current Cold Check 2.7. Adjustment 1.3. Leakage Current Hot Check (Fig. 1) 3 Conductor Views 1.4. X-Radiation 4 Schematic Diagram 1.5. GP31 Chassis Block Diagram 4.1.

  • Page 3: Safety Precautions

    1 Safety Precautions 1.1. General Guide Lines 1. It is advisable to insert an isolation transformer in the AC supply before servicing this hot chassis. 2. When servicing, observe the original lead dress, especially the lead dress in the high voltage circuits. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit.

  • Page 4: Gp31 Chassis Block Diagram

    1.5. GP31 Chassis Block Diagram...

  • Page 5: Service Hints

    2 Service Hints 2.1. Service Position for E-Board 1. Remove the back cover. 2. Stand the TV set as shown in Fig. 2. 3. Remove the A-Board from the TV set by pulling the main board out as shown in Figure 2. Fig.

  • Page 6: Adjustment For White Balance

    2.3. Adjustment for White Balance Preparation: 1. Receive the white balance pattern and aging should have been performed over 30 minutes. 2. Set the picture menu to DYNAMIC NORMAL. 3. Degausse the CRT face. 4. Fix the CRT colour analyzer receiver unit to CRT face. Adjustment of Low Light.

  • Page 7: Adjustment Procedure

    2.5. Adjustment Procedure 2.5.1. +B Voltage 2.5.3. 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. Brightness ... minimum Screen VR ..minimum Contrast ....

  • Page 8: Pal Colour

    2.6. PAL Colour 1. Receive the PAL B/G studio colour bar pattern and adjust local frequency at the best tuned position. 2. Pic Menu: Dynamic Normal, Confirm Contrast - 100 DAC, Sub Contrast - 21 dac. 3. Channel colour set --------- STD 4.
  • Page 9 Before Colour Purity, Convergence and White Balance adjustment are attempted, V. Height, H. Centre and Focus adjustments must be completed. Colour Purity Convergence 1. Set the Brightness and Contrast controls to their maximum 1. Apply a crosshatch pattern signal and Normalize Contrast positions.
  • Page 10 Adjustment of CRT VRS 1. Preparation a. Set DY to CRT not to tilt up and down left and right deflection. b. Set CY to CRT and set CY magnet primarily (Fig. 1) Purity magnet : Set purity magnet that 2 magnets are (TOP POSITION) VRS magnet : Set purity magnet 2 magnets are (HORIZONTAL POSITION) 2.
  • Page 11 Fig. 10 Fig. 11 Notes: 1. Wedge A, B and C should be inserted following the sequence of 1, 2 and 3 shown in Fig. 11. 2. The wedges should be set 120° apart from each other. 3. Be certain that three wedges are firmly fixed and the Deflection Yoke is tightly clamped in place. Otherwise the Deflection Yoke may shift its position and cause a loss of convergence and purity.

  • Page 12: Conductor Views

    3 Conductor Views...

  • Page 13: Schematic Diagram

    4 Schematic Diagram...

  • Page 15: A Board

    4.1. A Board 4.1.1. A Board (1/5) <1A> <2A> <3A> <4A> <5A> <6A> <7A> <8A>...
  • Page 16 4.1.2. A Board (2/5) <1A> <1B> <2B> <2A> <3B> <3A> <4B> <4A> <5B> <5A> <6A> <6B> <7B> <7A> <8A> <8B>...
  • Page 17 4.1.3. A Board (3/5) <1B> <1C> <2B> <2C> <3B> <4B> <3C> <5B> <4C> <5C> <6C> <6B> <7B> <7C> <8B> <8C>...
  • Page 18 4.1.4. A Board (4/5) <1C> <1D> <2D> <2C> <3D> <4D> <3C> <5D> <4C> <6D> <5C> <6C> <7D> <8D> <7C> <8C>...
  • Page 19 4.1.5. A Board (5/5) <1D> <2D> <3D> <4D> <5D> <6D> <7D> <8D>...

  • Page 20: L Board

    4.2. L Board 4.2.1. L Board (1/3) <1A> <2A> <3A> <4A> <5A> <6A>...
  • Page 21 4.2.2. L Board (2/3) <1A> <1A> <1B> <2A> <2A> <2B> <3A> <3A> <4A> <4A> <5A> <5A> <3B> <4B> <5B> <6A> <6A> <6B>...
  • Page 22 4.2.3. L Board (3/3) <1B> <2B> <3B> <4B> <5B> <6B>...

  • Page 23: Parts Locations

    5 Parts Locations...

  • Page 24: Replacement Parts List

    6 Replacement Parts List...

  • Page 25: Replacement Parts List

    E 0.1UF, 50V K2JZ2B000021 ANTENNA PLUG C2305 ECEA1HKN0R1 E 0.1UF, 50V TBM4G1237 MODEL NAME PLATE C2306 F2A1H100A162 E 10UF, 50V TBM4G3013 PANASONIC BADGE C2380 ECA1CM101B E 100UF, 16V TBX4G90411 POWER BUTTON C2381 ECA1CM100B E 10UF, 16V TES4G206 COIL SPRING C3020...
  • Page 26 Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C612 ECJ2VB1H472K C 4700PF, K, 50V D1151 B3AGA0000089 DIODE C613 ECJ2VB1H472K C 4700PF, K, 50V D2380 B0ACQJ000001 DIODE C614 ECQV1H104JL P 0.1UF, J, 50V D2381 B0ACQJ000001 DIODE...
  • Page 27 Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks L3136 J0JKA0000038 BEAD CORE R1111 D0GD103JA017 F 10KOHM,J, 1/10W L3137 J0JKA0000038 BEAD CORE R1112 D0GD332JA017 F 3.3KOHM,J, 1/10W L352 J0JKA0000022 BEAD CORE R1115 D0GD103JA017 F 10KOHM,J, 1/10W L501 G0D820000005...
  • Page 28 Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R401 ERDS2TJ104 C 100KOHM,J, 1/4W R817 ERDS1TJ100 C 10OHM,J, 1/2W R402 D0GD470JA017 F 47OHM,J, 1/10W R818 ERG2FJ473H M 47KOHM, J , 2W R403 ER0S2CHF2491 M 2.49KOHM, 1/10W R820 ERX12SJR33E...
  • Page 29 Ref. Part No. Part Name & Description Remarks K1KA13A00138 CONNECTOR K1KA13A00138 CONNECTOR K1ZZ00001301 CONNECTOR LF801 ELF21V012S LINE FILTER PC860 B3PAA0000261 PHOTO COUPLER RL801 K6B1CDA00029 RELAY RM1104 B3RAC0000014 REMOCON RECEIVER SC351 K3B095A00001 CRT SOCKET SW1001 EVQ11G05R SWITCH SW1002 EVQ11G05R SWITCH SW1003 EVQ11G05R SWITCH SW1004...

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