Panasonic TX-21FG50A Service Manual
Panasonic TX-21FG50A Service Manual

Panasonic TX-21FG50A Service Manual

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Specifications
Power Source :
Power Consumption :
Aerial Impedance :
Receiving System :
Receiving Channels :
VHF
1-11 PAL B (Australia & N.Zealand)
UHF
CATV
Intermediate Frequency :
Video
Sound
All manuals and user guides at all-guides.com
AC AUTO 110-240V, 50/60 Hz
83W
75Ω unbalanced
Coaxial type
17 Systems
1-12 PAL/SECAM D
1-12 NTSC M JAPAN
2-12 PAL/SECAM B, G
2-13 NTSC M U.S.A.
21-69 PAL G I/SECAM B, G, K1
28-69 PAL G (Australia)
13-56 PAL D
13-52 NTSC M JAPAN
14-69 NTSC NTSC M U.S.A.
S1-S41 (Hyper)
38.0 MHz
31.5 MHz (D, K, K1)
32 MHz (I)
32.5 MHz (B, G)
33.5 MHz (M)
TX-21FG50A-
AUSTRALIA
GP31 Chassis
Colour
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. MTV0501369C3
Colour Television
33.57 MHz (PAL)
33.6 MHz (SECAM)
33.75 MHz (SECAM)
34.42 MHz (NTSC)
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 TX-21FG50A

  • Page 1 All manuals and user guides at all-guides.com ORDER NO. MTV0501369C3 Colour Television TX-21FG50A- AUSTRALIA GP31 Chassis Specifications Power Source : AC AUTO 110-240V, 50/60 Hz Colour 33.57 MHz (PAL) Power Consumption : 33.6 MHz (SECAM) Aerial Impedance : 75Ω unbalanced 33.75 MHz (SECAM)
  • Page 2: Table Of Contents

    All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA 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.
  • Page 3: Safety Precautions

    All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA 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

    All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA 1.5. GP31 Chassis Block Diagram...
  • Page 5: Service Hints

    All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA 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.
  • Page 6: Adjustment For White Balance

    All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA 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.
  • Page 7: Adjustment Procedure

    All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA 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.
  • Page 8: Pal Colour

    All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA 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.
  • Page 9 All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA 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.
  • Page 10 All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA 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)
  • Page 11 All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA 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.
  • Page 12: Conductor Views

    All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA 3 Conductor Views...
  • Page 13: Schematic Diagram

    All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA 4 Schematic Diagram...
  • Page 14 All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA...
  • Page 15: A Board

    All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA 4.1. A Board 4.1.1. A Board (1/5) <1A> <2A> <3A> <4A> <5A> <6A>...
  • Page 16 All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA 4.1.2. A Board (2/5) <1A> <1B> <2A> <2B> <3A> <3B> <4A> <4B> <5B> <5A> <6A> <6B>...
  • Page 17 All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA 4.1.3. A Board (3/5) <1B> <1C> <2C> <2B> <3C> <3B> <4C> <4B> <5B> <5C> <6B> <6C>...
  • Page 18 All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA 4.1.4. A Board (4/5) <1C> <1D> <2D> <2C> <3D> <3C> <4D> <4C> <5D> <6D> <5C> <6C>...
  • Page 19 All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA 4.1.5. A Board (5/5) <1D> <2D> <3D> <4D> <5D> <6D>...
  • Page 20: L Board

    All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA 4.2. L Board 4.2.1. L Board (1/3) <A1> <A2> <A3> <A4> <A5>...
  • Page 21 All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA 4.2.2. L Board (2/3) <A1> <B1> <A2> <B2> <A3> <B3> <B4> <B5> <A4> <A5> <B6>...
  • Page 22 All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA 4.2.3. L Board (3/3) <B1> <B2> <B3> <B4> <B5> <B6>...
  • Page 23: Parts Locations

    All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA 5 Parts Locations...
  • Page 24: Replacement Parts List

    All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA 6 Replacement Parts List...
  • Page 25: Replacement Parts List

    All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA 6.1. Replacement Parts List Ref. Part No. Part Name & Description Remarks C2114 ECJ2VF1H104Z C 0.1UF, Z, 50V Ref. Part No. Part Name & Description Remarks C2115 ECA1HM4R7B E 4.7UF, 50V C2117...
  • Page 26 All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks C566 ECQM4103RJZ P 0.01UF, J, 400V C881 ECA1CM101B E 100UF, 16V C567 ECQM4393JZ P 0.039UF, J,400V...
  • Page 27 All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks IC2301 AN17820B Q857 B1BAAN000029 TRANSISTOR IC351 TDA6107JF/N3 Q870 B1ABCE000015 TRANSISTOR IC451 AN15525A Q871 B1ABCE000015 TRANSISTOR IC601...
  • Page 28 All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R145 D0GD473JA017 F 47KOHM,J, 1/10W R414 D0GD432JA017 F 4.3KOHM,J, 1/10W R150 D0GD222JA017 F 2.2KOHM,J, 1/10W R415...
  • Page 29 All manuals and user guides at all-guides.com TX-21FG50A-AUSTRALIA Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks R840 ERD75TAJ825 C 8.2MOHM,J, 3/4W SW1006 EVQ11G05R SWITCH R841 D0GD472JA017 F 4.7KOHM,J, 1/10W SW801 ESB92DA1B SWITCH...

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