Panasonic TC-21FG20P Service Manual Download Page 4 | Manualshive

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1.5. GP31 Chassis Block Diagram

I

MONITOR

OUT

IC801

T801

IC880

STBY 5V

IC1201

3.3V

EEPROM

IC1103

V OUT

IC601

UOC

SAW

AV1

AV2

YUV1

IF

H OUT

MSP

IC2101

AUDIO

AMP

IC2301A

V

H

R G B

SDA SCL

PRIMARY

LIFE CCT

QIF / AUDIO DEEMP

AV1

AV2

AUDIO

AMP

IC2301

IC851

5V & 8V

Antenna

CRT

SAW

SIF

SPEAKER

YUV

AMOUT

SOUND

TRAP

AUDIO

SWITCH

IC3151

R

G

B

defl.

coil

TUNER

SW

IFVO

CVBS1

CVBSO

CVBS2

CVBS3

SOUND MODULATION

MONO STEREO

4

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Summary of Contents for TC-21FG20P

Page 1: ...Ltd All rights reserved Unauthorized copying and distribution is a violation of law TC 21FG20P GP31 Chassis Video Terminals AV1 2 RAV In Video In 1 Vp p 75Ω Audio In Approx 400mVrms Monitor Out Video Out 1 Vp p 75Ω Audio Out Approx 400mVrms High Voltage 27 5kV 1 5 at zero beam current Picture Tube A51LXR195X 51cm 21 inches Measured diagonally 90 deflection Audio Output 16 0W Dimensions Height 473 ...

Page 2: ...ice Hints 5 2 1 Service Position for E Board 5 2 2 Factory Mode Adjustment 5 2 3 Adjustment for White Balance 6 2 4 Adjustment for CRT CUT OFF 6 2 5 Adjustment Procedure 7 2 6 PAL Colour 8 2 7 Adjustment 8 3 Conductor Views 12 4 Schematic Diagram 13 4 1 A Board 15 4 2 L Board 20 5 Parts Locations 23 6 Replacement Parts List 24 6 1 Replacement Parts List 25 CONTENTS Page Page 2 ...

Page 3: ... 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 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 u...

Page 4: ...C601 UOC SAW AV1 AV2 YUV1 IF H OUT MSP IC2101 AUDIO AMP IC2301A V H R G B SDA SCL PRIMARY LIFE CCT QIF AUDIO DEEMP AV1 AV2 AUDIO AMP IC2301 IC851 5V 8V Antenna CRT SAW SIF SPEAKER YUV AMOUT SOUND TRAP AUDIO SWITCH IC3151 R G B defl coil TUNER SW IFVO CVBS1 CVBSO CVBS2 CVBS3 SOUND MODULATION MONO STEREO 4 ...

Page 5: ...Mode Adjustment How to set To set the Factory mode press Volume 0 dac on the TV and Timer Setting 30 min on the remote control and press Volume Down button on the TV together press recall on the remote control CHK should appear on right of TV screen To move from CHK1 to CHK2 mode etc please follow below rotation To Set Self Check Press the Volume Down button on TV then press the Off Timer button o...

Page 6: ...R CUT OFF so that X 0 235 0 010 nit 3 Adjustment G CUT OFF so that Y 0 235 0 010 nit Adjustment of High Light 1 Adjustment Sub Bright so that Y 270 nit 2 Adjustment R Drive so that X 0 265 0 010 nit 3 Adjustment B Drive so that Y 0 265 0 010 nit 2 4 Adjustment for CRT CUT OFF Preparation 1 Connect the oscilloscope probe to TPL5 2 Screen VR min 3 Set the data Sub Bright Bright 4 In service Mode at ...

Page 7: ...drop 2 5 3 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 10 and confirm the B voltage is 141 0 1 5V 2 Connect a high frequency voltmeter to heater and confirm that voltage reads 6 3 0 24 VRMS 3 Normalize the brightness and contrast 2 5 4 NTSC TINT COLOUR Item preparation 1 C...

Page 8: ...so confirm OSD become blue colour 5 Set A to 2 1 0 1V by BRT CHK2 at measurement point TPL 2 Fig 4 1 Connect oscilloscope probe to TPL 2 G OUT with 10kΩ series resistor and adjust Contrast so that B as in Fig 4 is 2 4 0 05V 2 Adjust Sub Colour so that waveform as in Fig 4 1 2 5 0 1V 3 Connect oscilloscope probe to TPL 1 R OUT with 10kΩ series resistor and confirm waveform as in Fig 5 is 2 2 7 0 4V...

Page 9: ... field is obtained 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 l...

Page 10: ...agnet 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 Adjustment a Receive that Cross Hatch pattern b Adjust V SHIFT 50Hz c Set 2 magnets of horizontal position to up and down equally so that it will be the center part of CRT Fig 2 10 ...

Page 11: ... 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 11 ...

Page 12: ...3 Conductor Views 12 ...

Page 13: ...4 Schematic Diagram 13 ...

Page 14: ...14 ...

Page 15: ...4 1 A Board 4 1 1 A Board 1 5 1A 2A 3A 4A 5A 6A 7A 8A 15 ...

Page 16: ...4 1 2 A Board 2 5 1A 2A 3A 4A 5A 6A 7A 8A 1B 2B 3B 4B 5B 6B 7B 8B 16 ...

Page 17: ...4 1 3 A Board 3 5 1B 2B 3B 4B 5B 6B 7B 8B 1C 2C 3C 4C 5C 6C 7C 8C 17 ...

Page 18: ...4 1 4 A Board 4 5 1C 2C 3C 4C 5C 6C 7C 8C 1D 2D 3D 4D 5D 6D 7D 8D 18 ...

Page 19: ...4 1 5 A Board 5 5 1D 2D 3D 4D 5D 6D 7D 8D 19 ...

Page 20: ...4 2 L Board 4 2 1 L Board 1 3 1A 2A 3A 4A 5A 6A 20 ...

Page 21: ...4 2 2 L Board 2 3 1A 2A 3A 4A 5A 6A 1A 2A 3A 4A 5A 6A 1B 2B 3B 4B 5B 6B 21 ...

Page 22: ...4 2 3 L Board 3 3 1B 2B 3B 4B 5B 6B 22 ...

Page 23: ...5 Parts Locations 23 ...

Page 24: ...6 Replacement Parts List 24 ...

Page 25: ...n Remarks C2140 ECJ2VC1H010C C 1PF C 50V C2141 ECJ2VF1C105Z C 1UF Z 16V C2142 ECJ2VF1C105Z C 1UF Z 16V C2302 F2A1C222A117 E 2200UF 16V C2303 ECA1CM101B E 100UF 16V C2304 ECEA1HKN0R1 E 0 1UF 50V C2305 ECEA1HKN0R1 E 0 1UF 50V C2306 F2A1H100A162 E 10UF 50V C2380 ECA1CM101B E 100UF 16V C2381 ECA1CM100B E 10UF 16V C3020 ECJ2VB1H392K C 3900PF K 50V C3021 F2A1C4710045 E 470UF 16V C3028 ECJ2VF1C105Z C 1UF...

Page 26: ...F Z 50V C883 ECJ2VF1H104Z C 0 1UF Z 50V C971 ECJ2VF1H103Z C 0 01UF Z 50V DIODES D002 MTZJ18B ZENER DIODE D003 MTZJ16A ZENER DIODE D011 B0ACQJ000001 DIODE D1105 MTZJ7 5C ZENER DIODE D1120 B0ACQJ000001 DIODE D1130 MTZJ5 6C ZENER DIODE D1131 MTZJ5 6C ZENER DIODE D1132 MTZJ5 6A ZENER DIODE D1140 MTZJ5 6B ZENER DIODE Ref No Part No Part Name Description Remarks D1151 B3AGA0000089 DIODE D2380 B0ACQJ0000...

Page 27: ... D0GD332JA017 F 3 3KOHM J 1 10W R1115 D0GD103JA017 F 10KOHM J 1 10W R1116 D0GD332JA017 F 3 3KOHM J 1 10W R1120 D0GD102JA017 F 1KOHM J 1 10W R1122 D0GD332JA017 F 3 3KOHM J 1 10W R1123 D0GD681JA017 F 820OHM J 1 10W R1124 ERJ6GEY0R00 M 0OHM J 1 10W R1125 D0GD103JA017 F 10KOHM J 1 10W R1130 D0GD101JA017 F 100OHM J 1 10W R1131 D0GD101JA017 F 100OHM J 1 10W R1132 D0GD101JA017 F 100OHM J 1 10W R1133 D0GD...

Page 28: ...HM J 1 10W R687 D0GD472JA017 F 4 7KOHM J 1 10W R688 D0GD103JA017 F 10KOHM J 1 10W R801 D0D72R2KA002 W 2 2OHM 7W R810 ERG2FJ470 M 47OHM J 2W R811 ERG2FJ104H M 100KOHM J 2W Ref No Part No Part Name Description Remarks R817 ERDS1TJ100 C 10OHM J 1 2W R818 ERG2FJ473H M 47KOHM J 2W R820 ERX12SJR33E M 0 33OHM J 1 2W R821 ERX12SJR27E M 0 27OHM J 1 2W R824 ERDS2TJ152 C 1 5KOHM J 1 4W R825 ERDS2TJ102 C 1KOH...

Page 29: ...1 K6B1CDA00029 RELAY RM1104 B3RAC0000014 REMOCON RECEIVER SC351 K3B095A00001 CRT SOCKET SW1001 EVQ11G05R SWITCH SW1002 EVQ11G05R SWITCH SW1003 EVQ11G05R SWITCH SW1004 EVQ11G05R SWITCH SW1005 EVQ11G05R SWITCH SW1006 EVQ11G05R SWITCH SW801 ESB92DA1B SWITCH TU001 ENV56K10G3F TUNER X181 EFCS4R5MW5 CERAMIC FILTER X2130 TSSA128 CRYSTAL OSC X601 H0D120500020 CRYSTAL OSC XF101 M1971M SAW FILTER 29 ...

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