Sharp 20MR10, Service Manual

Page 1: ...s service only The contents are subject to change without notice CONTENTS SERVICE MANUAL POWER INPUT AC 120 V 60 Hz POWER RATING 69 W PICTURE SIZE 1 194cm2 185sq inch CONVERGENCE Magnetic SWEEP DEFLECTION Magnetic FOCUS Hi Bi PotentialElectrostatic INTERMEDIATE FREQUENCIES Picture IF Carrier Frequency 45 75 MHz SoundIF Carrier Frequency 41 25 MHz Color Sub Carrier Frequency 42 17 MHz Nominal AUDIO...

Page 2: ...ibration of this meter should be checked periodically 3 Highvoltage should alwaysbe kept at therated value no higher Operationat highervoltagesmay cause a failure of the picturetube or high voltage circuitry and also under certain conditions may produce radiation in exceeding of desirablelevels 4 Whenthehigh voltage regulator is operating properly there is no possibility of an X radiation problem ...

Page 3: ...y a 0 15µF capacitor in series with all exposed metal cabinet parts and a known earth ground such as electricalconduitor electrical ground connected to earth ground Use an AC voltmeter having with 5000 ohm per volt orhigher sensitivity to measure the AC voltagedrop across the resistor For continued protection replacement parts must be identical to those used in the original circuit The use of subs...

Page 4: ...eceiving channel when in Closed Caption mode CHANNEL UP DOWN Selects next higher channel Selects next lower channel Press both at the same time to access the MAIN MENU screen VOLUME UP DOWN Increases sound Decreases sound 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 mode ch...

Page 5: ...on of the horizontal oscillator does not stop in step 5 the circuit must be repaired before the set is returned to the customer HIGH VOLTAGE CHECK High voltage is not adjustable but must be checked to verify that the receiver is operating within safe and efficient design limitations as specified checks should be as follows 1 Connect an accurate high voltage meter between ground and anode of pictur...

Page 6: ...mode Use the reset function in the video adjustment menu to ensure customer control are in their proper reset position 2 Service number selection In the service mode you willsee the window screen as window There are 3 adjustment categories DEF SIGNAL FIX VALUE as show in Figure A Press CH UP DOWN buttonforselectionand enter by VOL UP or VOL DOWN Press CH UP DOWN button toselect the adjustment item...

Page 7: ...F26 H BLK L 00 07 04 00 SERVICE POSITION ADJUST ITEM DATA RANGE INITIAL VALUE Hex Table A Beloware the ranges and initial values for each adjustment and in each categories DEF D01 H PHASE 00 1F 0C D02 V SIZE 00 7F 40 D03 V POSITION 00 3F 20 Mustbe 20 D04 CC POSITION 00 FF 1A D05 V LINEARITY 00 1F 10 Mustbe 18 D06 V S CORRECTION 00 1F 10 Mustbe 0C SERVICE POSITION ADJUST ITEM DATA RANGE INITIAL VAL...

Page 8: ...rite the above initialvalues intoIC2102 IC2101 Table D The adjustmentis needed to compensate for characteristics of parts includingIC201 Holding down both the Vol up Ch down buttons on the TV set in the service mode for more than 2 seconds will automatically write the above initial values into IC2102 IC2101 X X ADJUSTMENT NECESSAR Y UNNECESSAR Y PART REPLACED NOTES R2101 R2102 R2103 R2104 If using...

Page 9: ...annel 2 Enter the service mode signal category and select the service adjustment S01 3 Set the data value to point where no noise or beat appears 4 Select another channel to confirm that no noise or beat appears Note You have to exit the service mode first to select another channel Video Level TV Det Video Level Adjustment 1 Receive a goodlocal channel 2 Enter the service mode signal category and ...

Page 10: ...od local channel 2 Enter the servicemode DEF category and select the adjustment D01 3 Adjust D01 data value to center the picture Vertical Phase Adjustment 1 Receive a good local channel 2 Enter the service mode DEF category and select the adjustment D03 3 Adjust D03 bus data to get the most acceptable vertical position Note The step range is 20 032 10steps Caption Position Adjustment Horizontal 1...

Page 11: ...11 20MR10 6 5 4 3 2 1 A B C D E F G H CHASSIS LAYOUT ...

Page 12: ...12 20MR10 6 5 4 3 2 1 A B C D E F G H BLOCK DIAGRAM ...

Page 13: ...ltages measured with 1000µ V B W or Color signal WAVEFORM MEASUREMENTCONDITIONS 1 Photographs taken on a standard gated color bar signal the tint setting adjusted for proper color The wave shapes at the red green and blue cathodesof 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 ...

Page 14: ...54CEN1 C211 VCKYCY1HB102K 1000p C301 VCCCCY1HH470J 47p VCCCCY1HH220J 22p C304 VCCCCY1HH470J 47p VCCCCY1HH220J 22p C802 VCEA0A1CW106M 10 16V R209 VRS CY1JF123J 12k VRS CY1JF000J 0 R302 VRS CY1JF332J 3 3k VRS CY1JF152J 1 5k R413 VRS CY1JF152J 1 5k VRS CY1JF222J 2 2K NOTE SCHEMATIC DIAGRAM MAIN Unit ...

Page 15: ...16 20MR10 6 5 4 3 2 1 A B C D E F G H SCHEMATIC DIAGRAM CRT Unit ...

Page 16: ...17 20MR10 6 5 4 3 2 1 A B C D E F G H PWB A MAIN Unit Wiring Side PRINTED WIRING BOARD ASSEMBLIES ...

Page 17: ...18 20MR10 6 5 4 3 2 1 A B C D E F G H PWB A MAIN Unit Chip Parts Side ...

Page 18: ...19 20MR10 6 5 4 3 2 1 A B C D E F G H PWB B CRT Unit Chip Parts Side PWB B CRT Unit Wiring Side ...

Page 19: ...AF QEARC2016PEZZ J Grounding Strap AG PRINTED WIRING BOARD ASSEMBLIES NOT REPLACEMENTITEM PWB A DUNTKA358WEX0 MAIN Unit PWB B DUNTKA359WEW3 CRT Unit PWB A DUNTKA358WEX0 MAIN UNIT TUNER NOTE THE PARTS HERE SHOWNARE SUPPLIEDAS AN ASSEMBLY BUT NOT INDEPENDENTL Y TU51 VTUVTST5UF770 R Tuner AZ or VTUENV56D82 1 INTEGRATED CIRCUITS IC201 RH iX3354CEZZ J LA76843 AT or RH iX3354CEN1 IC351 VHiAN7511 1 J AN7...

Page 20: ...758 RH DX0131CEZZ J Diode AC VA701 RH VX0048CEZZ J Varistor AE or RH VX0019CEZZ PACKAGED CIRCUIT PR701 RMPTP0026CEZZ J Packaged Circuit AF X801 RCRSB0001PEZZ J Crystal AL or RCRSB0205CEZZ FILTER AND COILS CF2040 RFiLA0099CEZZ J Ceramic Filter AE or RFiLC0121GEZZ L201 VP XF1R2K0000 J Peaking 1 2µH AB L202 VP XF1R2K0000 J Peaking 1 2µH AB L203 VP XF220K0000 J Peaking 22µH AB L204 RCiLi0632CEZZ J IF ...

Page 21: ...W107M J 100 25V EL AC C732 VCKYPA1HF103Z J 0 01 50V Ceramic AA C735 VCCCPA1HH680J J 68p 50V Ceramic AA C737 VCEA0A1EW226M J 22 25V EL AB C738 RC KZ0040CEZZ J 820p 2kV Ceramic AD or RC KZ0340CEZZ C739 VCEA0A1HW104M J 0 1 50V EL AB C740 VCEA0A1EW476M J 47 25V EL AB C743 RC KZ0338CEZZ J 560p 2kV Ceramic AD C750 VCKYPA1HF103Z J 0 01 50V Ceramic AA C752 VCEA0A1CW476M J 47 16V EL AB C753 RC KZ0338CEZZ J...

Page 22: ... VRS CY1JF000J J 0 1 16W M Ox AA R654 VRD RA2BE154J J 150k 1 8W Carbon AA R655 VRS CY1JF103J J 10k 1 16W M Ox AA R659 VRN RL3AB1R0J X 1 0 1W M Film AE R661 VRN RL3ABR47J X 0 47 1W M Film AE R662 VRD RA2BE102G J 1 0k 1 8W Carbon AB R702 RR DZ0049CEZZ J 3 9 1 2W Carbon AB R703 VRW KP3HC1R8K J 1 8 5W Cement AC R705 VRN RL3ABR39J X 0 39 1W M Film AE R706 VRN RL3ABR39J X 0 39 1W M Film AE R707 VRD RM2H...

Page 23: ... VRS CY1JF563J J 56k 1 16W M Ox AA R2507 VRS CY1JF823J J 82k 1 16W M Ox AA R2508 VRS CY1JF153J J 15k 1 16W M Ox AA R2509 VRS CY1JF272J J 2 7k 1 16W M Ox AA R2601 VRD RA2BE331J J 330 1 8W Carbon AA SWITCHES S2501 QSW K0202PEZZ J Power AC or QSW K0079GEZZ S2502 QSW K0202PEZZ J VOL Down AC or QSW K0079GEZZ S2503 QSW K0202PEZZ J VOL Up AC or QSW K0079GEZZ S2504 QSW K0202PEZZ J CH Down AC or QSW K0079G...

Page 24: ...EZZ J Diode AB COIL L852 VP MK820K0000 J Peaking 82µH AB CAPACITORS EL Electrolytic C851 VCCCCY1HH151J J 150p 50V Ceramic AA C852 VCCCCY1HH151J J 150p 50V Ceramic AA C853 VCCSPA1HL151J J 150p 50V Ceramic AA C854 RC KZ0029CEZZ J 0 01 1 4kV Ceramic AC or RC KZ0160CEZZ C883 VCEA0A1CW336M J 33 16V EL AB RESISTORS M Ox Metal Oxide R851 VRS CY1JF470J J 47 1 16W M Ox AA R852 VRD RA2BE181J J 180 1 8W Carb...

Page 25: ...20MR10 PACKING OF THE SET REAR Use tape to fix the top side of packing case Packing Case FRONT Buffer Material Wrapping Paper Polyethylene Bag Operation Manual Infrared R C Unit Batteries MARK Not replacement items Use 10 staples to fix the bottom side of packing case ...

Page 26: ...y 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 ELECTRONICA MEXICO S A DE C V Blvd SHARP No 3510 Parque Industrial Rosarito Playas de Rosarito B C 22710 D SEM P SEMEX TQ1071 S Jun 2001 Printed in Japan MI KG ...