Panasonic TC-21PM70R Service Manual
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Panasonic TC-21PM70R Service Manual

Panasonic TC-21PM70R Service Manual

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Specifications
Power Source :
Power Consumption :
Aerial Impedance :
Receiving System :
Receiving Channels :
VHF
UHF
21-69 (PAL G, H, I/SECAM G, K, K1)
CATV
Intermediate Frequency :
AC AUTO 110-240V, 50/60 Hz
71W
75Ω unbalanced
Coaxial type
17 Systems
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.)
28-69 (PAL B AUST.)
13-57 (PAL D, K)
13-62 (NTSC M JAPAN)
14-69 (NTSC M U.S.A.)
S1-S41 (OSCAR)
1-125 (U.S.A. CATV)
C13-C41 (JAPAN)
S21-S41 (HYPER)
Z1-Z37 (CHINA)
TC-21PM70R
GP3 Chassis
Video
Sound
31.5 MHz (D, K, K1) / 32.5 MHz (B, G)
Colour
Video / Audio Terminals :
FAV In
RAV In
Monitor Out
High Voltage :
Picture Tube :
Audio Output :
Speaker :
Dimensions :
© 2003 Matsushita Electric Industrial Co., Ltd. All
rights
reserved.
distribution is a violation of law.
ORDER NO. MTV0308236C3-CIS
Colour Television
38.0 MHz
32.0 MHz (I) / 32.5 MHz (M)
33.57 MHz (PAL)
33.6 MHz (SECAM)
32.5 MHz (B, G)
33.75 MHz (SECAM)
34.42 MHz (NTSC)
Video In 1 Vp-p 75Ω
Audio In Approx. 400mVrms
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
A51QDX992X
51cm (21 inches)
Measured diagonally,
90° deflection
Height : 464.0 mm
Width : 682.0 mm
Depth : 484.0 mm
Unauthorized
copying
7W
8Ω
and

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Summary of Contents for Panasonic TC-21PM70R

  • Page 1 ORDER NO. MTV0308236C3-CIS Colour Television TC-21PM70R GP3 Chassis Specifications Power Source : AC AUTO 110-240V, 50/60 Hz Video 38.0 MHz Power Consumption : Sound 31.5 MHz (D, K, K1) / 32.5 MHz (B, G) Aerial Impedance : 75Ω unbalanced 32.0 MHz (I) / 32.5 MHz (M)

  • Page 2: Table Of Contents

    TC-21PM70R Mass : 25 kg (Net Wt.) Specifications are subject to change without notice. Mass and dimensions shown are approximate. 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.

  • Page 3: Safety Precautions

    TC-21PM70R 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: Gp3 Chassis Block Diagram

    TC-21PM70R 1.5. GP3 Chassis Block Diagram...

  • Page 5: Service Hints

    TC-21PM70R 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 Fig. 2.

  • Page 6: Adjustment For White Balance

    TC-21PM70R 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.

  • Page 7: Adjustment Procedure

    TC-21PM70R 2.5. Adjustment Procedure Item / Preparation Adjustment Procedure +B Voltage Confirm the DC voltage at the indicated test points, as follows : 1. Operate the TV set. TPA 10 : 140.5 ± 1.5V 2. Set control as follows : TPA 8 : 8 ±...

  • Page 8: Pal Colour

    TC-21PM70R 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 - 100AC, Sub Contrast - 21DAC. 3. Channel colour set --------- STD.
  • Page 9 TC-21PM70R 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 TC-21PM70R 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 TC-21PM70R 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.

  • Page 12: Conductor Views

    TC-21PM70R 3 Conductor Views...

  • Page 13: Schematic Diagram

    TC-21PM70R 4 Schematic Diagram...
  • Page 14 TC-21PM70R...

  • Page 15: A Board

    TC-21PM70R 4.1. A BOARD 4.1.1. A BOARD 1/4 <1A> <2A> <3A> <4A> <5A> <6A> <7A> <8A> <9A> <10A> <11A> <12A> <13A> <14A> <15A> <16A> <17A>...
  • Page 16 TC-21PM70R 4.1.2. A BOARD 2/4 <1A> <1B> <2B> <2A> <3B> <3A> <4A> <4B> <5A> <5B> <6A> <7A> <8A> <6B> <9A> <10A> <7B> <11A> <8B> <12A> <9B> <13A> <10B> <14A> <15A> <16A> <11B> <17A> <12B>...
  • Page 17 TC-21PM70R 4.1.3. A BOARD 3/4 <1B> <1C> <2B> <2C> <3B> <3C> <4B> <5B> <6B> <4C> <7B> <5C> <8B> <6C> <9B> <10B> <11B> <12B>...
  • Page 18 TC-21PM70R 4.1.4. A BOARD 4/4 <1C> <2C> <3C> <4C> <5C> <6C>...

  • Page 19: L Board

    TC-21PM70R 4.2. L BOARD 4.2.1. L BOARD 1/2 <1A> <2A> <3A> <4A> <5A> <6A> <7A>...
  • Page 20 TC-21PM70R 4.2.2. L BOARD 2/2 <1A> <2A> <3A> <4A> <5A> <6A> <7A>...

  • Page 21: Parts Location

    TC-21PM70R 5 Parts Location...

  • Page 22: Replacement Parts List

    TC-21PM70R 6 Replacement Parts List...

  • Page 23: Replacement Parts List

    TC-21PM70R 6.1. Replacement Parts List Ref. No. Part No. Part Name & Description Remarks R640 ERJ6GEYJ822 M 8.2KOHM,J,1/10W R672 ERJ6GEYJ181 M 180OHM,J,1/10W Ref. No. Part No. Part Name & Description Remarks R686 ERJ6GEYJ470 M 47OHM,J,1/10W A51QDX992X PICTURE TUBE R687 ERJ6GEYJ472 M 4.7KOHM,J,1/10W...
  • Page 24 TC-21PM70R Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks C566 ECQM4682JZ P 6800PF, J,400V L1051 EXCELSA35T BEAD CORE C567 ECQM4223JZ P 0.022UF, J,400V L1101 TALV35VB331K PEAKING COIL C568 ECWH16332JVB P 3300PF,J,1.6KV...
  • Page 25 TC-21PM70R Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks JA17 ERJ6GEY0R00 M 0OHM,J,1/10W R553 ERJ6GEYJ223 M 22KOHM,J,1/10W JA19 ERJ6GEY0R00 M 0OHM,J,1/10W R555 ERQ14AJ2R0P F 2.0OHM,J, 1/4W JA20 ERJ6GEY0R00 M 0OHM,J,1/10W...
  • Page 26 TC-21PM70R Ref. No. Part No. Part Name & Description Remarks Ref. No. Part No. Part Name & Description Remarks C122 ECJ2VF1H103Z C 0.01UF, Z, 50V C3151 ECJ2VF1C105Z C 1UF, Z, 16V C136 ECJ2VF1H103Z C 0.01UF, Z, 50V C3153 ECJ2VF1C105Z C 1UF, Z, 16V...
  • Page 27 TC-21PM70R Ref. No. Part No. Part Name & Description Remarks Q580 2SD0601A0L TRANSISTOR Q581 2SB709ATX TRANSISTOR Q601 2SB709ATX TRANSISTOR Q602 2SD0601A0L TRANSISTOR Q840 2SD0601A0L TRANSISTOR Q850 B1BCCM000002 TRANSISTOR Q852 2SD0601A0L TRANSISTOR Q857 2SC54190RA TRANSISTOR Q870 2SD0601A0L TRANSISTOR Q871 2SD0601A0L TRANSISTOR...

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