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1.5. GP3 Chassis Block Diagram

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TC-21PM70R

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Содержание TC-21PM70R

Страница 1: ...td All rights reserved Unauthorized copying and distribution is a violation of law TC 21PM70R GP3 Chassis Video 38 0 MHz Sound 31 5 MHz D K K1 32 5 MHz B G 32 0 MHz I 32 5 MHz M Colour 33 57 MHz PAL 33 6 MHz SECAM 32 5 MHz B G 33 75 MHz SECAM 34 42 MHz NTSC Video Audio Terminals FAV In Video In 1 Vp p 75Ω Audio In Approx 400mVrms RAV In Video In 1 Vp p 75Ω Audio In Approx 400mVrms Monitor Out Vide...

Страница 2: ...Radiation 3 1 5 GP3 Chassis Block Diagram 4 2 Service 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 19 5 Parts Location 21 6 Replacement Parts List 22 6 1 Replacement Parts ...

Страница 3: ...ed 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 ...

Страница 4: ...1 5 GP3 Chassis Block Diagram 4 TC 21PM70R ...

Страница 5: ...justment 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 on remot...

Страница 6: ...hat 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 Bright dac press 5 in factory mode to enter vertical line and a...

Страница 7: ...firm AGC at Tuner voltage drop High Voltage 1 Receive the crosshatch pattern 1 Connect a DC voltage meter to TPA 20 and confirm the B voltage is 140 5 1 5V 2 Set to 0 Beam Screen VR minimum 2 Connect a high frequency voltmeter to heater and confirm that voltage reads 6 3 0 48 VRMS Contrast minimum 3 Normalize the brightness and contrast Item Preparation Adjustment Procedure NTSC TINT COLOUR Connec...

Страница 8: ...OFF Note ABL is set off in CHK2 6 Set A to 2 3 0 2V 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 6 0 1V 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 4 ...

Страница 9: ...d is obtained Fig 7 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...

Страница 10: ... 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 TC 21PM70R ...

Страница 11: ...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 TC 21PM70R ...

Страница 12: ...3 Conductor Views 12 TC 21PM70R ...

Страница 13: ...4 Schematic Diagram 13 TC 21PM70R ...

Страница 14: ...14 TC 21PM70R ...

Страница 15: ...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 15 TC 21PM70R ...

Страница 16: ...4 1 2 A BOARD 2 4 1A 1B 2B 3B 4B 5B 6B 7B 8B 9B 10B 11B 12B 2A 3A 4A 5A 6A 7A 8A 9A 10A 11A 12A 13A 14A 15A 16A 17A 16 TC 21PM70R ...

Страница 17: ...4 1 3 A BOARD 3 4 1B 1C 2C 3C 4C 5C 6C 2B 3B 4B 5B 6B 7B 8B 9B 10B 11B 12B 17 TC 21PM70R ...

Страница 18: ...4 1 4 A BOARD 4 4 1C 2C 3C 4C 5C 6C 18 TC 21PM70R ...

Страница 19: ...4 2 L BOARD 4 2 1 L BOARD 1 2 1A 2A 3A 4A 5A 6A 7A 19 TC 21PM70R ...

Страница 20: ...4 2 2 L BOARD 2 2 1A 2A 3A 4A 5A 6A 7A 20 TC 21PM70R ...

Страница 21: ...5 Parts Location 21 TC 21PM70R ...

Страница 22: ...6 Replacement Parts List 22 TC 21PM70R ...

Страница 23: ...672 ERJ6GEYJ181 M 180OHM J 1 10W R686 ERJ6GEYJ470 M 47OHM J 1 10W R687 ERJ6GEYJ472 M 4 7KOHM J 1 10W R688 ERJ6GEYJ103 M 10KOHM J 1 10W R689 ERJ6GEYJ750 M 75OHM 1 10W R801 ERF7ZK2R2 W 2 2OHM 7W R810 ERG2FJ470 M 47OHM J 2W R811 ERG2FJ104H M 100KOHM J 2W R817 ERDS1TJ100 C 10OHM J 1 2W R818 ERG2FJ683H M 68KOHM J 2W R820 ERX12SJR33E M 0 33OHM J 1 2W R821 ERX12SJR27E M 0 27OHM J 1 2W R824 ERDS2TJ152 C 1...

Страница 24: ...0 TSK1045 BEAD CORE L801 G0B303G00001 LINE FILTER L820 EXCELSA39E BEAD CHOKE L821 EXCELSA35T BEAD CORE L852 EXCELSA35B BEAD CORE L853 EXCELSA39E BEAD CHOKE L854 EXCELSA35B BEAD CORE L862 TLTACT1R5K PEAKING COIL L871 TLTACT1R5K PEAKING COIL L872 TLTACT1R5K PEAKING COIL L873 EXCELSA39V BEAD CORE Ref No Part No Part Name Description Remarks L1051 EXCELSA35T BEAD CORE L1101 TALV35VB331K PEAKING COIL L...

Страница 25: ...0W Ref No Part No Part Name Description Remarks R553 ERJ6GEYJ223 M 22KOHM J 1 10W R555 ERQ14AJ2R0P F 2 0OHM J 1 4W R556 ER050CKF5603 M 560KOHM F 1 2W R557 ER050CKF9532 M95 3KOHM F 1 2W R558 ERDS2TJ223 C 22KOHM J 1 4W R559 ERQ1CJP2R2S M 2 2OHM J 1W R560 ERG1SJ102E M 1KOHM J 1W R580 ERJ6GEYJ392 M 3 9KOHM J 1 10W R581 ERJ6GEYJ183 M 18KOHM J 1 10W R582 ERJ6GEYJ154 M 150KOHM J 1 10W R583 ERJ6GEYJ274 M ...

Страница 26: ...UF 50V C2380 ECA1CM101B E 100UF 16V C2381 ECA1CM100B E 10UF 16V C3020 ECJ2VC1H561K C 560PF K 50V C3021 ECA1CM471B E 470UF 16V C3037 ECJ2VF1C105Z C 1UF Z 16V C3136 ECJ2VB1H103J C 0 01UF 50V C3137 ECJ2VB1H103J C 0 01UF 50V C3138 ECA1CM100B E 10UF 16V C3139 ECA1CM100B E 10UF 16V C3144 ECJ2VC1H561K C 560PF K 50V Ref No Part No Part Name Description Remarks C3151 ECJ2VF1C105Z C 1UF Z 16V C3153 ECJ2VF1C...

Страница 27: ...SISTOR Q601 2SB709ATX TRANSISTOR Q602 2SD0601A0L TRANSISTOR Q840 2SD0601A0L TRANSISTOR Q850 B1BCCM000002 TRANSISTOR Q852 2SD0601A0L TRANSISTOR Q857 2SC54190RA TRANSISTOR Q870 2SD0601A0L TRANSISTOR Q871 2SD0601A0L TRANSISTOR Q1052 2SD0601A0L TRANSISTOR Q1053 2SD0601A0L TRANSISTOR 27 TC 21PM70R ...

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