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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.

 3. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers, shields and isolation R-C

combinations, are properly installed.

 4. When the receiver is not to be used for a long period of time, unplug the power cord from the AC cord outlet.
 5. Potential, as high as

32.0kV

is present when this receiver is in operation. Operation of the receiver without the rear cover

involves the danger of a shock hazard from the receiver power supply. Servicing should not be attempted by anyone who is not
thoroughly familiar with the precautions necessary when working on high voltage equipment. Always discharge the anode of the
picture tube to the receiver chassis before handling the tube. After servicing make the following leakage current checks to
prevent the customer from being exposed to shock hazards.

1.2. Leakage Current Cold Check

 1. Unplug the AC cord and connect a jumper between the two prongs on the plug.
 2. Turn on the receiver’s power switch.

Measure the resistance value, with an ohmmeter, between the jumper AC plug and each exposed metallic cabinet part on the
receiver, such as screw heads, aerials, connectors, control shafts, etc. When the exposed metallic part has a return path to the
chassis, the reading should be between 4 M

and 20 M

. When the exposed metal does not have a return path to the chassis,

the reading must be infinite.

1.3. Leakage Current Hot Check (Fig. 1)

 1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
 2. Check a 2 k

non-inductive resistor and an AC/DC current meter, in series with each exposed metallic part on the receiver in

turn and an earth such as a water pipe.
The current from any point should not exceed 0.7 mA peak AC or 2 mA DC. In the case of a measurement being outside of
these limits specified, there is a possibility of a shock hazard and the receiver should be repaired and rechecked before it is
returned to the customer.

Fig. 1

1.4. X-Radiation

Warning:

The potential sources of X-Radiation in TV set are the EHT section and the picture tube. When using a picture tube test jig for
service, ensure that jig is capable of handling

32.0kV

without causing X-Radiation.

Note:

It is important to use an accurate periodically calibrated high voltage meter.

 1. Set the brightness to minimum.
 2. Use the remocon to get into Service Mode.
 3. Measure the EHT. The meter reading should indicate

31.0±1.0kV

. If the meter indication is out of tolerance, immediate service

and correction is required to prevent the possibility of premature component failure.

 4. To prevent the possibility X-Radiation, it is essential to use the specified picture tube, if service replacement becomes

necessary.

3

TC-29FX20R

Summary of Contents for TC-29FX20R

Page 1: ...5Ω PB 0 7Vp p 75Ω 2006 Matsushita Electric Industrial Co Ltd All rights reserved Unauthorized copying and distribution is a violation of law TC 29FX20R GP41 Chassis PR 0 7Vp p 75Ω AV 1 2 3 Video In 1Vp p 75Ω Audio In Approx 0 5V 47kΩ Monitor Out Video Out 1Vp p 75Ω Audio Out Approx 0 5V 1kΩ Intermediate Frequency Video 38 0 MHz Sound 31 5 MHz D K K1 32 MHz I 32 5 MHz B G 33 5 MHz M Colour 33 57 MH...

Page 2: ...ce Position for E Board 5 2 2 Adjustment for White Balance 5 2 3 Adjustment for CRT CUT OFF 5 Specifications are subject to change without notice Mass and dimensions shown are approximate 2 4 Adjustment Procedure 6 2 5 Adjustment 7 3 Conductor Views 9 4 Schematic Diagram 10 4 1 A Board 12 4 2 L Board 17 4 3 G Board 20 5 Parts Locations 24 6 Replacement Parts List 25 6 1 Replacement Parts List 26 C...

Page 3: ...sed metallic cabinet part on the receiver such as screw heads aerials connectors control shafts etc When the exposed metallic part has a return path to the chassis the reading should be between 4 MΩ and 20 MΩ When the exposed metal does not have a return path to the chassis the reading must be infinite 1 3 Leakage Current Hot Check Fig 1 1 Plug the AC cord directly into the AC outlet Do not use an...

Page 4: ...WER SWITCH G GEOMAGNETIC WOOFER AMP IC2401 PVP IC1801 R G B SCL SDA CVBS IN REAR INPUTS AV1 V L R AV 3 YUV V L R VCT IF IC601 V_IN CVBS OUT MON_OUT R G B R G B MON_OUT V L R EEPROM IC1101 VM SCL SDA A_IN IF H A AUDIO OUT V SPEAKER AUDIO AMP IC2301 V OUT H OUT TUNER FRONT INPUTS AV2 V L R PP 29 models PIP models 4 TC 29FX20R ...

Page 5: ...Adjustment of Low Light 1 Adjustment Sub Bright so that Y 6 3 1 0 nit 2 Adjustment R CUT OFF so that X 0 247 0 005 nit 3 Adjustment G CUT OFF so that Y 0 273 0 005 nit Adjustment of High Light 1 Adjustment Sub Bright so that Y 150 nit 2 Adjustment R Drive so that X 0 261 0 003 nit 3 Adjustment B Drive so that Y 0 267 0 003 nit 2 3 Adjustment for CRT CUT OFF Preparation 1 Connect the oscilloscope p...

Page 6: ... 2V TPA 16 141 2V TPA 17 8 2 0 3V TPA 18 1 9 0 2V TPA19 5 2 0 2V TPA20 220 15V 2 4 2 High Voltage Item preparation 1 Receive the crosshatch pattern 2 Set to 0 Beam Screen VR minimum Contrast minimum Adjustment procedure 1 Connect a DC voltage meter to TPA 16 and confirm the B voltage is 141 0 2V 2 Connect a high frequency voltmeter to heater and confirm that voltage reads 6 3 0 24 VRMS 3 Normalize...

Page 7: ...ained Fig 21 10 Re adjust the Low Light controls to their correct settings and make sure that a uniform white field is obtained 11 Tighten the clamp screw A in Fig 10 Convergence 1 Apply a crosshatch pattern signal and Normalize Contrast control to the maximum positions 2 Adjust Brightness until the grey position of the crosshatch pattern just becomes black 3 Adjust the Red and Blue line at the ce...

Page 8: ... 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 8 TC 29FX20R ...

Page 9: ...3 Conductor Views 9 TC 29FX20R ...

Page 10: ...4 Schematic Diagram 10 TC 29FX20R ...

Page 11: ...11 TC 29FX20R ...

Page 12: ...4 1 A Board 4 1 1 A Board 1 5 1A 2A 3A 4A 5A 6A 7A 8A 9A 12 TC 29FX20R ...

Page 13: ...4 1 2 A Board 2 5 1A 2A 3A 4A 5A 6A 7A 8A 9A 1B 2B 3B 4B 5B 6B 7B 8B 9B 13 TC 29FX20R ...

Page 14: ...4 1 3 A Board 3 5 1B 2B 3B 4B 5B 6B 7B 8B 9B 1C 2C 3C 4C 5C 6C 7C 8C 9C 14 TC 29FX20R ...

Page 15: ...4 1 4 A Board 4 5 1C 2C 3C 4C 5C 6C 7C 8C 9C 1D 2D 3D 4D 5D 6D 7D 8D 9D 15 TC 29FX20R ...

Page 16: ...4 1 5 A Board 5 5 1D 2D 3D 4D 5D 6D 7D 8D 9D 16 TC 29FX20R ...

Page 17: ...4 2 L Board 4 2 1 L Board 1 3 1A 2A 3A 4A 5A 6A 7A 17 TC 29FX20R ...

Page 18: ...4 2 2 L Board 2 3 1A 2A 3A 4A 5A 6A 7A 1B 2B 3B 4B 5B 6B 7B 18 TC 29FX20R ...

Page 19: ...4 2 3 L Board 3 3 1B 2B 3B 4B 5B 6B 7B 19 TC 29FX20R ...

Page 20: ...4 3 G Board 4 3 1 G Board 1 4 1A 2A 3A 4A 5A 6A 7A 20 TC 29FX20R ...

Page 21: ...4 3 2 G Board 2 4 1A 2A 3A 4A 5A 6A 7A 1B 2B 3B 4B 5B 6B 7B 21 TC 29FX20R ...

Page 22: ...4 3 3 G Board 3 4 1B 2B 3B 4B 5B 6B 7B 1C 2C 3C 4C 5C 6C 7C 22 TC 29FX20R ...

Page 23: ...4 3 4 G Board 4 4 1C 2C 3C 4C 5C 6C 7C 23 TC 29FX20R ...

Page 24: ...5 Parts Locations 24 TC 29FX20R ...

Page 25: ...6 Replacement Parts List 25 TC 29FX20R ...

Page 26: ...C3025 ECJ2VF1C105Z C 1UF Z 16V C3027 ECJ2VF1C105Z C 1UF Z 16V C303 ECJ2VB1C104K C 0 1UF K 16V C3034 ECA1AM471B E 470UF 10V C305 F2A1C4710045 E 470UF 16V C306 F1J1H102A018 E 1000UF 50V C307 F1J1H102A018 E 1000UF 50V C308 F1J1H102A018 E 1000UF 50V C3155 F1J1H103A590 C 0 01UF J 50V C3156 ECA1CM101B E 100UF 16V C3157 ECA1CM101B E 100UF 16V C3163 F2A1C101A310 E 100UF 16V C3164 F2A1C101A310 E 100UF 16V ...

Page 27: ...C893 ECA1CM221B E 220UF 16V C894 B81130C1224M P 0 22UF 275V C895 B81130C1224M P 0 22UF 275V C897 F1J1H332A021 C 3300PF 50V C898 ECJ2VF1C105Z C 1UF Z 16V C904 F1B1H103A013 C 0 01UF 50V C912 F1J1H104A578 C 0 1UF 50V C952 ECA1HHG100 E 10UF 50V C953 F1B1H103A013 C 0 01UF 50V C958 ECA2CM470B E 47UF 160V C959 F1B2H1030028 C 0 01UF 500V C960 F1A2H151A035 C 150PF 500V Ref No Part No Part Name Description ...

Page 28: ...12H TRANSISTOR Q520 B1ADBM000004 TRANSISTOR Q551 2SC6073000LK TRANSISTOR Q601 B1ABCE000015 TRANSISTOR Q603 B1ABCE000015 TRANSISTOR Q604 B1ABCE000015 TRANSISTOR Q605 B1ABCE000015 TRANSISTOR Q608 B1ABCE000015 TRANSISTOR Q610 B1ADDF000005 TRANSISTOR Q701 B1MBDLB00002 TRANSISTOR Q702 B1ABCE000015 TRANSISTOR Q703 B1ABCE000015 TRANSISTOR Q846 B1ABCF000176 TRANSISTOR Q850 B1BCCM000002 TRANSISTOR Q857 B1B...

Page 29: ...KOHM 1 10W R512 ERJ6ENF1002 M 10KOHM 1 10W R513 ERQ14AJ100E F 10OHM J 1 4W R516 ERX12SJR56P M 0 56OHM 1 2W Ref No Part No Part Name Description Remarks R517 ERX12SJR56P M 0 56OHM 1 2W R518 D0DK3R3J0002 W 3 3OHM J 1 10W R522 ERDS2TJ513 C 51KOHM J 1 4W R523 ERJ6GEYJ103 M 10KOHM J 1 10W R524 ERJ6GEYJ104 M 100KOHM J 1 10W R525 ERJ6GEYJ392 M 3 9KOHM J 1 10W R551 ERG1FJ101P M 100OHM J 1 10W R552 ERG1SJ1...

Page 30: ...Z H DRIVE TRANS T801 ETS39AG4A6AC SWITCHING TRANS OTHERS A1 K1KA13A00140 CONNECTOR A13 K1KA13A00140 CONNECTOR A17 K1KA13A00138 CONNECTOR A18 K1KA13A00140 CONNECTOR A2 K1KA13A00140 CONNECTOR A6 K1KA13A00138 CONNECTOR A8 K1KA04AA0093 CONNECTOR CF835 D4DDE9R00002 POSISTOR F850 K5D502BLA016 FUSE G4 K1KA04AA0190 CONNECTOR Ref No Part No Part Name Description Remarks JA1 ERJ6GEY0R00 M 0OHM J 1 10W JA10 ...

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