Sharp 20MU14, Service Manual

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

Page 2: ...meter should be checked periodically 3 High voltage should always be kept at the rated value no higher Operation at higher voltages may cause a failure of the picture tube or high voltage circuitry and also under certain conditions may produce radiation in exceeding of desirable levels 4 When the high voltage regulator is operating properly there is no possibility of an X radiation problem Every t...

Page 3: ... 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 120 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 15mF capacitor in series with all exposed metal cabinet parts and a known earth ground such as electr...

Page 4: ...4 LOCATION OF USER S CONTROL 20MU14 ...

Page 5: ...f 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 picture tu...

Page 6: ... Use the reset function in the video adjustment menu to ensure customer controls are in their proper reset position 2 Service number 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 number will vary in increments of one from S01 to OP Select the item you wish to adjust 3 Data number selection Press the Vol up or down...

Page 7: ...03 No VERTICAL S20 ENERGY SAVE OFFSET 20 00 3F Must be set to 23 S21 D D E OFFSET 03 00 1F Must be set to 03 S22 OSD SETUP 00 00 03 Must be set to 00 S23 TUNER SETUP 00 00 01 Must be set to 00 OP OPTION 30 00 FF Must be set to 02 NECESSARY UNNECESSARY ADJUSTMENT NOTES PART REPLACED IC2001 IC2101 X CRT X IC201 X X Data is stored in IC2101 The adjustment is needed to compensate for characteristics o...

Page 8: ...aster screen cotrol until the raster darkens to the point where raster is barely seen 7 Adjust the service adjustments S11 red S12 green and S13 blue to obtain a good grey scale with normal whites at low brightness level 8 Select the service adjustment S19 and reset data to 00 Select the service adjustment S03 and reset data to obtain normal color level 9 Remove digital voltmeter and reset the mas...

Page 9: ... measured with 1000µ V B W or Color signal WAVEFORM MEASUREMENT CONDITIONS 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 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 grou...

Page 10: ...10 6 5 4 3 2 1 A B C D E F G H CHASSIS LAYOUT NORMAL PR701 C708 20MU14 ...

Page 11: ...11 6 5 4 3 2 1 A B C D E F G H BLOCK DIAGRAM 20MU14 ...

Page 12: ...12 8 7 10 9 6 5 4 3 2 1 A B C D E F G H SCHEMATIC DIAGRAM MAIN 1 Unit 20MU14 ...

Page 13: ...13 17 16 19 18 15 14 13 12 11 10 20MU14 ...

Page 14: ...14 6 5 4 3 2 1 A B C D E F G H SCHEMATIC DIAGRAM CRT Unit 20MU14 ...

Page 15: ...15 6 5 4 3 2 1 A B C D E F G H PWB A MAIN Unit Wiring Side PRINTED WIRING BOARD ASSEMBLIES 20MU14 ...

Page 16: ...16 6 5 4 3 2 1 A B C D E F G H PWB A MAIN Unit Chip Parts Side I I I I I P I I I P I P P I I I I I P P P I I I I I P P I I I I I I I 20MU14 ...

Page 17: ...17 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 b b b b b b b b b b b b b b b b b 20MU14 ...

Page 18: ...B D457 RH EX0644GEZZY X Zener Diode 13V AB D458 RH EX0644GEZZY X Zener Diode 13V AB D459 VHD1SS119 1Y X Diode AA D502 RH DX0131CEZZY X Diode AB D511 RH DX0441CEZZY X Diode AB D632 RH EX0630GEZZY X Zener Diode 9 1V AB D641 RH EX0630GEZZY X Zener Diode 9 1V AB D651 VHD1SS244 1Y X Diode AB D653 RH EX0667GEZZY X Zener Diode 27V AB D661 RH DX0468CEZZ X Diode AB D701 RH DX0490CEZZY X Diode AB D702 RH DX...

Page 19: ...lar AB C606 VCKYPA2HB561K X 560p 500V Ceramic AB C607 VCKYPA1HB472K X 4700p 50V Ceramic AB C610 VCFPVC3ZA772H X 7700p 1 5kV M Poly AB C612 VCFPVC2DB474J X 0 47 200V M Poly AB C633 VCEA0A1AW337M X 330 10V EL AB C634 VCKYCY1HF103ZY X 0 01 50V Ceramic AA C635 VCEA0A1HW105M X 1 0 50V EL AB C636 VCQYTA1HM153J X 0 015 50V Mylar AB C637 VCEA0A1CW476M X 47 16V EL AB C652 VCEA0A1HW475M X 4 7 50V EL AB C653...

Page 20: ...28 VRD RA2BE272JY X 2 7k 1 8W Carbon AA R529 VRD RA2BE472JY X 4 7k 1 8W Carbon AA U R604 VRS RG3DB682J X 6 8k 2W M Ox AB R605 VRD RA2BE121JY X 120 1 8W Carbon AA R606 VRD RA2BE102JY X 1 0k 1 8W Carbon AA R607 VRS RG3DB682J X 6 8k 2W M Ox AB U R608 VRS RG3DB391J X 390 2W M Ox AB U R609 VRS RG3AB562J X 5 6k 1W M Ox AB R610 VRD RM2HD220JY X 22 1 2W Carbon AA U R611 VRS KA3HG3R3K X 3 3 5W M Ox AB R622...

Page 21: ...1JF101JY X 100 1 16W M Ox AA R2047 VRS CY1JF221JY X 220 1 16W M Ox AA R2048 VRS CY1JF562JY X 5 6k 1 16W M Ox AA R2049 VRS CY1JF333JY X 33k 1 16W M Ox AA R2060 VRS CY1JF221JY X 220 1 16W M Ox AA R2061 VRS CY1JF562JY X 5 6k 1 16W M Ox AA R2062 VRS CY1JF183JY X 18k 1 16W M Ox AA R2063 VRS CY1JF222JY X 2 2k 1 16W M Ox AA R2065 VRS CY1JF000JY X 00 1 16W M Ox AA R2066 VRS CY1JF103JY X 10k 1 16W M Ox AA ...

Page 22: ...RMCG1339CESB X R C GUN AH TINS B157WJZZ X OPERATION MANUAL AC TCAUS3000GJZZ X CAUTION LABEL AA SPAKCB228WJZZ X PACKING CASE AP SPAKP0102GJZZ X LAMIFOAM 457MM X 1800MM AC SPAKX0003GJZZ X PACKING FOAM AG SSAKA0101GJZZ X PLASTIC BAG AB 1 CCABA0108WEJ1 X CAB A ASSY AY 1 1 Not Available FRONT CABINET 1 2 GCOVA0003GJSA X R C COVER 1 3 HBDGB1001GJSA X BADGE AB 1 4 JBTN 0003GJSG X BUTTON Button Power AD V...

Page 23: ... 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 20MU14 ...

Page 24: ...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 ELECTRONICA MEXICO S A DE C V Quality Reliability Control Center Blvd SHARP No 3510 Parque Industrial Rosarito Playas de Rosarito México B C 22710 20MU14 ...