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Sharp 20LK32, Service Manual

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Sharp 20LK32 Service Manual Download Page 35

40

20LK32
20LK62

COPYRIGHT © 2001 BY SHARP CORPORATION

ALL RIGHTS RESERVED.

No part of this publication may be reproduced,
stored in a retrieval system, or transmitted in
any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, without
prior written permission of the publisher.

SHARP CORPORATION
AV Systems Group
Quality & Reliability Control Center
Yaita, Tochigi 329-2193, Japan

D SEM  P SEMEX

 TQ1225-S

Oct. 2001 Printed in Japan

MI. KG

Summary of Contents for 20LK32

Page 1: ...NPUT 110 220 V AC 50 60 Hz POWER RATING 20LK32 72 W 20LK62 79 W PICTURE SIZE 1 194 cm2 185sq inch CONVERGENCE Magnetic SWEEP DEFLECTION Magnetic FOCUS QPF Electrostatic INTERMEDIATE FREQUENCIES Picture IF Carrier Frequency 45 75 MHz Sound IF Carrier Frequency 41 25 MHz Color Sub Carrier Frequency 42 17 MHz Nominal AUDIO POWER OUTPUT RATING 20LK32 1 5 1 5 W at 10 distortion 20LK62 3 0 3 0 W at 10 d...

Page 2: ...e does not exceed the specified value and that it is regulating correctly 5 Do not use a picture tube other than that specified or make unrecommended circuit modifications to the high voltage circuitry 6 When trouble shooting and taking test measurements on a receiver with excessive high voltage avoid being unnecessarily close to the receiver Do not operate the receiver longer than is necessary to...

Page 3: ... networks mechanical insulators and etc 3 To be sure that no shock hazard exists check for leakage current in the following manner Plug the AC cord directly into a 110 220 volt AC outlet Do not use an isolation transformer for this test Using two clip leads connect a 1 5k ohm 10 watt resistor paralleled by a 0 15µF capacitor in series with all exposed metal cabinet parts and a known earth ground s...

Page 4: ...emporarily displays receiving channel when in Closed Caption mode Front Panel CHANNEL UP DOWN Selects next higher channel Selects next lower channel VOLUME UP DOWN Increases sound Decreases sound Basic Remote Control Functions POWER Press On Press again Off REMOTE KEYPAD Accesses any channel from keypad FLASHBACK Returns to previous channel VOLUME UP DOWN Increases sound Decreases sound In menu mo...

Page 5: ...re that the voltmeter reads 21 4 1 5 V 5 Apply external 27 9V DC at TP653 by using an external DC supply TV must be shut off 6 To reset the protector unplug the AC cord and make a short circuit between TP651 and TP652 Now make sure that normal picture appears on the screen 7 If the operation of the horizontal oscillator does not stop in step 5 the circuit must be repaired before the set is returne...

Page 6: ...nu to ensure customer controls are in their proper reset position 2 Service item selection Once in the service mode press the Ch up or Ch down button on the remote controller or at the set The service adjustment item will vary in increments of one Select the item you wish to adjust 3 Data number selection Press the Vol up or down button to adjust the data number To enter the service mode and exit ...

Page 7: ...RECTION S COR WHITE POINT ADJ MODE W P RED OFFSET HIGH OFFSET BLUE TONE DRI R HI W P GREEN OFFSET HIGH OFFSET BLUE TONE DRI G HI W P BLUE OFFSET HIGH OFFSET BLUE TONE DRI B HI W P RED MH STD DRI R MH W P GREEN MH STD DRI G MH W P BLUE MH STD DRI B MH W P RED OFFSET ML OFFSET RED TONE DRI R ML W P GREEN OFFSET ML OFFSET RED TONE DRI G ML W P BLUE OFFSET ML OFFSET RED TONE DRI B ML W P RED OFFSET LO...

Page 8: ...OVERSCAN SWITCH OFF OSO AUTO COLOUR LIMIT ACL FORCED COLOUR ON FCO VIDEO MUTE AT IDENT LOSS VMI VIDEO MUTE AT PROGRAM SOURCE CHANGE VMC HOTEL MODE HTL GAIN FM DEMODULATOR BTSC CHARGE PUMP CP FM WINDOW SELECTION FMWS SOUND MUTE BIT 0 SM0 SOUND MUTE BIT 1 SM1 IF AGC SPEED BIT 0 AGC0 IF AGC SPEED BIT 1 AGC1 PHI 1 TIME CONSTANT FOR FE FOA FE PHI 1 TIME CONSTANT FOR FE FOB FE PHI 1 TIME CONSTANT FOR AV...

Page 9: ... Must be 27 HTL VOL MAX HOTEL VOLUME 0 63 32 FIX HTL PRG HOTEL PROGRAM NO 0 125 or 125 for none 255 FIX BB CON BLUE BACK CONTRAST 0 15 10 FIX Must be 5 RGB OSD GRB REFERENCE 0 15 15 FIX Must be 5 CUT R BLACK LEVEL OFFSET R 0 63 32 ADJ CUT G BLACK LEVEL OFFSET G 0 63 32 ADJ CDL CATHODE DRIVE LEVEL 0 15 0 FIX Must be 4 DL TV Y D TIME TV YD 0 15 12 FIX Must be 2 DL AV Y D TIME AV YD 0 15 12 FIX Must ...

Page 10: ...R ON OFF 0 disable or 1 enable 0 FIX FAO FIXED AUDIO OUT 0 disable or 1 enable 0 FIX VIEW TM VIEW TIMER 0 disable or 1 enable 1 FIX Must be 1 FRENCH FRENCH LANGUAGE 0 disable or 1 enable 0 FIX EZ SETUP EZ SETUP AUTOPRESET 0 AUTOPRESET or 1 FIX 1 EZ SETUP W TEMP WHITE TEMP OR FAVORITE COLOR 0 FC or 1 WT 0 FIX AV AV ENABLED OR DISABLED 0 without ext source or 0 FIX 1 with external source AV2 AV2 ENA...

Page 11: ...ume key till the picture is centered 1 Call the V AMP mode 2 Increase or decrease V AMP by Volume key to set overscan of 10 0 typical Adjustment Spec 10 0 range 1 FIXED DATA NO NEED TO ADJUST 1 Call the H CENT mode 2 Increase or decrease H CENT by Volume key to center the picture horizontal 1 2 3 4 5 Focus adjustment 1 Receive the Monoscope Pattern signal 2 Press R C to set Picture NORMAL conditio...

Page 12: ...ghter than line 1 2 and 3 and finally line 5 will be the brighter than line 4 2 1 2 3 are in same black level WHITE BAL ANCE SERV ICE MODE ADJ I2C BUS CONTROL 3 11 600 K X 0 273 Y 0 280 MINOLTA COLOUR ANALYZER CA 100 NOTE Above DATA can be UP DOWN by volume key LOW HIGH 20 1 8cd m2 115cd m2 11 600 K DRI GW DRI GS DATA 5 DRI BW DRI BS DATA 5 1 Receive the Monoscope Pattern signal 2 Press R C to set...

Page 13: ...13 6 5 4 3 2 1 A B C D E F G H 20LK32 20LK62 MODEL 20LK32 CHASSIS LAYOUT ...

Page 14: ...14 6 5 4 3 2 1 A B C D E F G H 20LK32 20LK62 MODEL 20LK62 CHASSIS LAYOUT ...

Page 15: ...15 6 5 4 3 2 1 A B C D E F G H 20LK32 20LK62 BLOCK DIAGRAM 1 ...

Page 16: ...17 20LK32 20LK62 16 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H MODEL 20LK32 BLOCK DIAGRAM 2 ...

Page 17: ...19 20LK32 20LK62 18 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H MODEL 20LK62 BLOCK DIAGRAM 2 ...

Page 18: ...tandard gated color bar signal the tint setting adjusted for proper color The wave shapes at the red green and blue cathodes of the picture tube depend on the tint color level and picture control 2 indicates waveform check points See chart waveforms are measured from point indicated to chassis ground å AND SHADED COMPONENTS SAFETY RELATED PARTS MARK X RAY RELATED PARTS This circuit diagram is a st...

Page 19: ...21 6 5 4 3 2 1 A B C D E F G H 20LK32 20LK62 SCHEMATIC DIAGRAM CRT Unit ...

Page 20: ...23 20LK32 20LK62 22 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H MODEL 20LK32 SCHEMATIC DIAGRAM MAIN Unit ...

Page 21: ...25 20LK32 20LK62 24 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H MODEL 20LK62 SCHEMATIC DIAGRAM MAIN Unit ...

Page 22: ...27 20LK32 20LK62 26 12 11 10 9 8 7 6 5 4 3 2 1 A B C D E F G H MODEL 20LK62 SCHEMATIC DIAGRAM MTS MODULE Unit ...

Page 23: ...28 6 5 4 3 2 1 A B C D E F G H 20LK32 20LK62 PWB A MAIN Unit Wiring Side PRINTED WIRING BOARD ASSEMBLIES ...

Page 24: ...29 6 5 4 3 2 1 A B C D E F G H 20LK32 20LK62 PWB A MAIN Unit Chip Parts Side ...

Page 25: ...30 6 5 4 3 2 1 A B C D E F G H 20LK32 20LK62 PWB B CRT Unit Wiring Side PWB B CRT Unit Chip Parts Side ...

Page 26: ...31 6 5 4 3 2 1 A B C D E F G H 20LK32 20LK62 PWB E MTS MODULE Unit Chip Parts Side Only for 20LK62 PWB E MTS MODULE Unit Wiring Side Only for 20LK62 ...

Page 27: ...DA9302H 1 X TDA9302H AK or VHiAN5522 1 IC601 VHiKA7808AP 1 J KA7808API AE å IC701 VHiSTRG5653 1 X STRG5653 AQ IC801 RH iX3564CEN1 X IX3564CE AX IC1003 VHiBR24C02F1E J BR24C02F W AF TRANSISTORS Q201 VS2SC2735 1E J 2SC2735 AC Q253 VS2SD601A 1 J 2SD601A AC Q254 VS2SD601A 1 J 2SD601A AC Q304 VS2SD601A 1 J 2SD601A 20LK62 AC Q320 VS2SD601A 1 J 2SD601A 20LK62 AC Q321 VS2SD601A 1 J 2SD601A 20LK32 AC Q401 ...

Page 28: ...56 VCKYCY1HB472K J 4700p 50V Ceramic AA 20LK32 C359 VCEA0A1CW106M J 10 16V EL AB C360 VCEA0A1HW225M J 2 2 50V EL 20LK32 AB C409 VCKYCY1EF104Z J 0 1 25V Ceramic AA C410 VCKYCY1EF104Z J 0 1 25V Ceramic AA C411 VCKYCY1HB102K J 1000p 50V Ceramic AA C501 VCKYPA1HB102K J 1000p 50V Ceramic AA C504 VCKYCY1HB103K J 0 01 50V Ceramic AA C505 VCEA0A1HW107M J 100 50V EL AB C507 VCKYCY1HB103K J 0 01 50V Ceramic...

Page 29: ...0 1 16W M Ox AA RJ77 VRS CY1JF000J J 0 1 16W M Ox AA R201 VRS CY1JF101J J 100 1 16W M Ox AA R202 VRS CY1JF101J J 100 1 16W M Ox AA R205 VRS CY1JF680J J 68 1 16W M Ox AA R206 VRS CY1JF122J J 1 2k 1 16W M Ox AA R207 VRS CY1JF221J J 220 1 16W M Ox AA R208 VRS CY1JF122J J 1 2k 1 16W M Ox AA R209 VRS CY1JF392J J 3 9k 1 16W M Ox AA R216 VRS RG3LB223J X 22k 3W M Ox AF R219 VRD RA2BE392J J 3 9k 1 8W Carbo...

Page 30: ...VRS CY1JF221J J 220 1 16W M Ox AA R803 VRS CY1JF221J J 220 1 16W M Ox AA R804 VRS CY1JF221J J 220 1 16W M Ox AA R805 VRS CY1JF822J J 8 2k 1 16W M Ox AA R806 VRS CY1JF123J J 12k 1 16W M Ox AA R807 VRS CY1JF103J J 10k 1 16W M Ox AA R808 VRS CY1JF221J J 220 1 16W M Ox AA R809 VRD RA2BE224J J 220k 1 8W Carbon AA R812 VRS CY1JF101J J 100 1 16W M Ox AA R813 VRS CY1JF221J J 220 1 16W M Ox AA R1002 VRS CY...

Page 31: ...TX0124BM AE DIODES D881 VHD1SS119 1 J Diode AB D882 VHD1SS119 1 J Diode AB D883 VHD1SS119 1 J Diode AB D884 VHD1SS119 1 J Diode AB D885 VHD1SS119 1 J Diode AB CAPACITORS EL Electrolytic C871 VCCSCY1HL471J J 470p 50V Ceramic AA C872 VCCSCY1HL471J J 470p 50V Ceramic AA C873 VCCSCY1HL471J J 470p 50V Ceramic AA C875 VCKYPA2HB102K J 1000p 500V Ceramic AA C876 RC KZ0150CEZZ J 1000p 3kV Ceramic AB C878 V...

Page 32: ...V EL AC C3018 VCEA0A1HW105M J 1 0 50V EL AB C3019 VCEA0A1CW106M J 10 16V EL AB C3020 VCEA0A1CW106M J 10 16V EL AB C3021 VCEA0A1CW106M J 10 16V EL AB C3022 VCEA0A1CW106M J 10 16V EL AB C3031 VCEA0A1CW106M J 10 16V EL AB C3032 VCEA0A1CW106M J 10 16V EL AB C3033 VCKYCY1HF103Z J 0 01 50V Ceramic AA C3034 VCEA0A1HW224M J 0 22 50V EL AB C3039 VCEA0A1CW227M J 220 16V EL AC RESISTORS M Ox Metal Oxide R300...

Page 33: ...KA0101GJZZ Polyethylene Bag MISCELLANEOUS PARTS å ACC701 QACCZ3008PEZZ R AC Cord AN SP301 VSP9050PB40YA X Speaker R 20LK32 AK SP302 VSP9050PB40YA X Speaker L 20LK32 AK SP301 VSP9050PB394A X Speaker R 20LK62 AK SP302 VSP9050PB394A X Speaker L 20LK62 AK LHLDK0012PEZZ R AC Cord Holder AC LHLDW1003PEZZ R Holder AA LHLDW1009PEZZ R Holder AA LHLDW1033PEZZ R Holder AA LHLDW1060CEZZ R Holder AB LHLDW1104P...

Page 34: ...F THE SET REAR Use 12 staples fix the packing case Use tape to fix top side of pack case Packing Case FRONT Buffer Material Wrapping Paper Polyethylene Bag Operation Manual Infrared R C Unit Batteries MARK Not Replacement Items ...

Page 35: ... in a retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without prior written permission of the publisher SHARP CORPORATION AV Systems Group Quality Reliability Control Center Yaita Tochigi 329 2193 Japan D SEM P SEMEX TQ1225 S Oct 2001 Printed in Japan MI KG ...

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