Sharp LC-20SH1M Service Manual

Lcd colour television

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Operation manual (29 pages)

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Page 1: Table Of Contents
LC-20SH1M LC-20SH1X SERVICE MANUAL S25E7LC20SH1M LCD COLOUR TELEVISION LC-20SH1M LC-20SH1X MODELS In the interests of user-safety (Required by safety regulations in some countries) the set should be re- stored to its original condition and only parts identical to those specified should be used.
Page 2: Important Service Safety Precaution
LC-20SH1M LC-20SH1X IMPORTANT SERVICE SAFETY PRECAUTION Ë Service work should be performed only by qualified service technicians who are thoroughly familiar with all safety checks and the servicing guidelines which follow: • Connect the resistor connection to all exposed metal...
Page 3 LC-20SH1M LC-20SH1X Precautions for using lead-free solder 1 Employing lead-free solder "All PWBs" of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the PWBs and service manuals. The alphabetical character following LF shows the type of lead-free solder.
Page 4: Specifications
6.4 kg, w/o accessories ËAs a part of policy of continuous improvement, SHARP reserves the right to make design and specification changes for the LCD TV set improvement without prior notice. The performance specification figures indicated are nominal values of production units. There may be...
Page 5: Operation Manual
LC-20SH1M LC-20SH1X OPERATION MANUAL...
Page 6 LC-20SH1M LC-20SH1X...
Page 7: Dimensions
LC-20SH1M LC-20SH1X DIMENSIONS Unit: mm 403.3...
Page 8: Removing Of Major Parts
LC-20SH1M LC-20SH1X REMOVING OF MAJOR PARTS 1. Remove the stand fixing screws (4 pcs.). 2. Remove the cabinet B fixing screws (7 pcs.). 3. Remove the cabinet B after opening from the direction of an arrow. 4. Detach the connector from each PWB.
Page 9 LC-20SH1M LC-20SH1X 5. Remove the 2 lock screws from the main PWB and undo the hooks a. Detach the chassis frame, together with its terminals, from the main PWB. 6. Remove the 2 lock screws from the sub PWB and undo the hooks b, c and d. Detach the chassis frame together with its terminals, from the sub PWB.
Page 10 LC-20SH1M LC-20SH1X » Precautions in handling the LCD panels 1. Work in a clean room (with humidities below 50%). 2. Be sure to wear an anti-static armband. 3. Handle the panels on an electro-conductive mat. 4. Be careful not to fall, shake and shock the panels.
Page 11 LC-20SH1M LC-20SH1X » Precautions at the time of the side B(back) service of main, sub and Inverter unit. 1. Remove the FFC for connection between Main unit (SC1203) and LCD panel (CN1), and connect the extended cable (QCNW-B784WJZZ) for service.
Page 12: Adjusting Procedure Of Each Section
4-3. Setting the screen size (inches) 1) Enter the Adjustment Process mode. 2) Check the model number. 3) Hold down the "LEFT" or "RIGHT" cursor key longer than 2 seconds, and select a screen size (LC-20SH1M). SH1M Main Ver *.** Scaler Ver *.**.**...
Page 13 LC-20SH1M LC-20SH1X 5. Adjustment 5-1. RF AGC adjustment 1) Feed the colour bar signal. (intensity:52 dBµ) 2) In Adjustment Mode, select the RF AGC AUTO ("OFF") and press the " RIGHT" cursor key to start the adjustment. 3) Automatic adjustment is complete when it display "OK" is displayed.
Page 14 LC-20SH1M LC-20SH1X 7. Lamp error detection 7-1. Functional description This LCD colour television has a function (lamp error detection) to be turned OFF automatically for safety when the lamp or lamp circuit is abnormal. If the lamp or lamp circuit is abnormal, or some other errors happen, and the lamp error detection is executed, the followings occur.
Page 15: Hotel Mode
LC-20SH1M LC-20SH1X 8. Hotel mode 8-1. How to enter the Hotel mode. 1) Turn on the power and enter the Adjustment Process mode. 2) Using the "UP" or "DOWN" cursor key on the remote controller, select the Hotel mode. 3) Using the "RIGHT" cursor key on the remote controller, change the setting from "0" to "1". Now the Hotel mode shows up.
Page 16 LC-20SH1M LC-20SH1X 9. Software Loading 1) Upgrading the software or after replacement of IC151, IC501 or Main PWB, make sure to upload the processors with updated software. 2) Please use the dedicated Interface JIG (JIGINF-001) and supplied programs for upgrading the software.
Page 17 LC-20SH1M LC-20SH1X 4) First click [SST / ATMEL] and then follow by [Identify] to identify the flash memory. Confirm the item below in Comment Window. 5) Click [Select Intel HEX File …] to open the source files. The source file name are "Sedna_Sharp****.hex"...
Page 18 LC-20SH1M LC-20SH1X 9) Finally click [Restart System] to initialize. Confirm "Reset done" in Comment Window. 10) Power OFF the set by unplugging AC Cord, remove the JIG from the plug and wait for 1 minute before power ON again. Notes: If any error occur during any process, power OFF the set and repeat the all the process again. If these still fail, please erase Main Software and repeat the whole process again.
Page 19 LC-20SH1M LC-20SH1X 4) First click [Enter ISP Mode] then click [Send]. If the following window appear, click [Yes] Confirm ISP status "Ready". If "Entering ISP is not successful" occur, repeat step No. 4) again. If still fail, unplug the AC cord and repeat from step No.
Page 20 LC-20SH1M LC-20SH1X 6) Next click [Write Flash] and load the source file by clicking [Browse]. The source file name are "LC20SH1_****.hex". Once the data is loaded successfully click [Send]. Confirm the Program, PK26 & Character are all "OK" and ISP status is "Ready".
Page 21: Trouble Shooting Table
LC-20SH1M LC-20SH1X TROUBLE SHOOTING TABLE...
Page 22 LC-20SH1M LC-20SH1X TROUBLE SHOOTING TABLE (Continued)
Page 23 LC-20SH1M LC-20SH1X TROUBLE SHOOTING TABLE (Continued)
Page 24 LC-20SH1M LC-20SH1X TROUBLE SHOOTING TABLE (Continued)
Page 25 LC-20SH1M LC-20SH1X TROUBLE SHOOTING TABLE (Continued)
Page 26: Block Diagram
LC-20SH1M LC-20SH1X BLOCK DIAGRAM TUNER SF201 ANTENNA SF202 COMPONENT (INPUT1) DR/DL J3902 AUDIO IN R/G/B SW Y/Pr/Pb INPUT R/G/B SCALER IC850 VIDEO IN J3901 R/G/B IC501 SCALER AMP Q801-Q803 R/G/B S-INPUT V1_SY / V1_SC J5000 (INPUT2) INPUT2 V1_V VIDEO INPUT...
Page 27 LC-20SH1M LC-20SH1X R_IN / L_IN OUT1/2 HEADPHONE AUDIO POWER AMP J3301 IC3301 JACK SP_L/R Y/U/V P3301 SPEAKER IC801 Y/U/V IN MPCLK / MPDA RX0-RX4 RX0N-RX4N LVDSTOTTL IC1201 R0-R7, G0-G7, B0-B7 IC2201 DHS / DVS / LLC1_CLOCK SC1201 SC1202 FLASH PANEL...
Page 28: Overall Wiring Diagram
LC-20SH1M LC-20SH1X OVERALL WIRING DIAGRAM LCD GRADUATION LCD SOURCE (QCNW-C949WJQZ ) (QCNW-C948WJQZ ) MAIN DUNTKD089DE (QPWBXD089WJ) DUNTKD017DE (QPWBFD017WJ)
Page 29 LC-20SH1M LC-20SH1X LCD GATE (QCNW-C947WJQZ ) (QCNW-B813WJPZ ) P6700 NA391WJ SC105 N0596RE SC4201 N0596RE B6V_A 6V_A POWER POWER DUNTKD018DE (QPWBFD018WJ) KEY1 KEY1 KEY2 KEY2 P6701 NA391WJ INVERTER DUNTKD069DE P6702 NA391WJ (QPWBFD069WJ) BACKLIGHT ( KLMP-A046WJZZ ) P6703 NA391WJ DUNTKD019DE (QPWBFD019WJ) P6705 NA391WJ...
Page 30: Description Of Schematic Diagram
LC-20SH1M LC-20SH1X DESCRIPTION OF SCHEMATIC DIAGRAM VOLTAGE MEASUREMENT CONDITION: 1. The voltages at test points are measured on the stable supply voltage of AC 110-240V. Signals are fed by a colour bar signal generator for servicing purpose and the above voltages are measured with a 20k ohm/V tester.
Page 31: Schematic Diagram
LC-20SH1M LC-20SH1X SCHEMATIC DIAGRAM Ë INVERTER Unit...
Page 32 LC-20SH1M LC-20SH1X Ë SUB Unit-1/4...
Page 33 LC-20SH1M LC-20SH1X...
Page 34 LC-20SH1M LC-20SH1X Ë SUB Unit-2/4...
Page 35 LC-20SH1M LC-20SH1X Note:SUB 3 does not use it.
Page 36 LC-20SH1M LC-20SH1X Ë SUB Unit-4/4...
Page 37 LC-20SH1M LC-20SH1X...
Page 38 LC-20SH1M LC-20SH1X Ë MAIN Unit-1/3...
Page 39 LC-20SH1M LC-20SH1X...
Page 40 LC-20SH1M LC-20SH1X Ë MAIN Unit-2/3...
Page 41 LC-20SH1M LC-20SH1X...
Page 42 LC-20SH1M LC-20SH1X Ë MAIN Unit-3/3...
Page 43 LC-20SH1M LC-20SH1X...
Page 44: Operation Unit
LC-20SH1M LC-20SH1X Ë OPERATION Unit...
Page 45 LC-20SH1M LC-20SH1X Ë R/C, LED Unit...
Page 46: Printed Wiring Board Assemblies
LC-20SH1M LC-20SH1X PRINTED WIRING BOARD ASSEMBLIES SC1201 SC1202 R1206 R1207 R1205 R1116 R1211 IC1101 C2203 R1104 R22** CN107 CN108 P2002 R123 C127 IC101 R124 KD089DE Q105 C551 QPWBXD089WJZZ TU201 R201 R219 C205 L202 C804 SF203 C201 C207 C206 SC104 MAIN Unit (Side-A)
Page 47 LC-20SH1M LC-20SH1X SC1201 IC751 C766 L751 C1119 R713 SC105 R141 D1103 R1109 D759 IC1101 Q752 IC702 R1104 C720 C724 C709 IC701 Q701 R767 IC151 C551 C111 R301 IC501 C303 C535 R201 C301 IC850 C804 C304 C216 C420 C215 C822 C549...
Page 48 LC-20SH1M LC-20SH1X SC1201 SC1202 C1207 R1120 R1116 R1214 R1206 R1207 R1205 L2201 R1242 R1209 R1218 R1210 C2201 C722 R1211 C2203 IC2201 IC1201 C1203 R2232 IC1101 R1240 L2202 C1216 R1104 R2207 R2208 R2203 R2204 R2205 R2206 SC1203 P108 P107 C816 C1111...
Page 49 LC-20SH1M LC-20SH1X SC1201 IC751 C1119 SC105 C759 C766 L751 Q759 C758 R1116 R713 R141 Q702 R1118 R1117 R766 Q758 C760 D1101 D1103 R761 D759 R2233 Q755 Q756 R757 D755 R1109 TP102 R752 Q757 C702 C1113 L752 C1108 IC702 C752 C1110...
Page 50 LC-20SH1M LC-20SH1X SC105 C761 R110 R1123 Q106 Q1105 R1114 Q1106 C1109 R707 R1105 R1107 R701 C701 Q1103 R702 R715 R714 FB*** C557 C417 C416 R108 R107 R127 C415 C580 C821 R423 C582 C805 C105 C579 C803 C575 R801 C578 C123...
Page 51 LC-20SH1M LC-20SH1X R1122 R1208 FB1201 R1122 R1121 C1215 C1214 Q1201 R1215 R1216 Q1106 Q1202 R1222 D1202 R1230 R1105 C1213 Q1206 R1107 D1206 D1205 R132 R133 R131 R134 FB*** IC801 Q101 R208 R223 C203 R237 D206 C213 D203 D202 D205 Q203...
Page 52 LC-20SH1M LC-20SH1X C1118 R1127 C761 R1128 R110 R1123 Q1105 Q106 R1103 Q1106 IC704 R1114 D1104 C1109 R707 Q1102 Q1103 R701 C701 R702 R150 R715 C106 R714 C711 C557 FB803 FB501 FB532 C417 R108 R107 R127 C548 FB801 C510 C504 C416...
Page 53 LC-20SH1M LC-20SH1X C1118 R1243 R1127 R1122 R1128 R1121 FB1201 R1123 R1208 C1210 C1215 C1214 R1103 C1205 R1215 R1219 R2224 Q1204 R1212 R1216 Q1106 R2225 R1114 R1226 Q1203 R2226 R1227 R2228 R1222 R1201 R1203 R2227 Q1205 D1104 1109 D1202 R1202 R1204...
Page 54 LC-20SH1M LC-20SH1X QPWBFD017WJZZ (QKITPD017WJZZ) FB7732 DUNTKD017DE C7307 L7732 D7004 L7002 C7739 FB7007 L7004 C7008 C7014 C6709 T6704 C7012 HM6703 HM6704 T7001 L7003 HM6702 HM6701 T6703 R7001 HM6708 HM6707 R7003 HM6706 HM6705 L7731 R7733 C7736 C7735 R7337 HM7734 HM7732 T7701 C6716...
Page 55 LC-20SH1M LC-20SH1X R7337 T7701 R7732 SUB Unit (Wiring Side) P3901 J3901 P3902 C7751 R7754 R7758 R7751 J3902 IC7702 IC7703 J5000 D7715 C3306 R7715 C7715 R7716 HM7720 D7711 C3310 C3307 D7713 M7718 Q7701 D7703 D7704 C3315 J3301 HM7717 M7719 C3316 D7718...
Page 56 LC-20SH1M LC-20SH1X R3602 Q3601 C7311 D7308 R3603 D6703 R7305 Q3602 R7309 D7306 D3602 C3601 R7334 C3602 R7312 R7316 IC7301 R6728 Q6702 R7315 C7308 Q7305 R7303 R6703 C7304 C6725 R6702 R6701 C6703 R6712 R6713 C7007 C7016 C7009 D7002 R6743 R7010 D7003...
Page 57 LC-20SH1M LC-20SH1X R7762 C7740 R3326 SUB Unit (Chip Parts Side) R3312 Q7756 R3310 Q3301 Q7755 R3928 R3926 R3311 D3921 D3922 Q7751 R7765 R3929 R7752 R3921 R7755 C3322 C3319 C3921 D7735 R3316 R3922 R3304 R3319 R3301 R3309 R3302 R3307 C3303 D3304...
Page 58 LC-20SH1M LC-20SH1X INVERTER Unit (Wiring Side) INVERTER Unit (Chip Parts Side)
Page 59 LC-20SH1M LC-20SH1X...
Page 60 LC-20SH1M LC-20SH1X CH UP MENU S4201 POWER CH DOWN VOL - VOL + INPUT SW4207 SW4206 SW4203 SW4202 SW4205 SW4204 SC4201 QPWBFD018WJZZ DUNTKD018DE (QKITPD017WJZZ) OPERATION Unit (Wiring Side) R4202 R4204 R4205 R4201 R4203 OPERATION Unit (Chip Parts Side) D4002 POWER...
Page 61: Replacement Parts List
Part No. Description Code Ref. No. Part No. Description Code PARTS LIST DUNTKD017DE09 (LC-20SH1M) DUNTKD017DE12 (LC-20SH1X) PARTS REPLACEMENT SUB UNIT INTEGRATED CIRCUITS Replacement parts which have these special safety characteristics IC3301 VHiLA4635A+-1S J LA4635A identified in this manual; electrical components having such features IC7301 VHiBD9300F+-1Y J I.C.
Page 62 Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKD017DE09 (LC-20SH1M) C7301 VCKYCY1EF104ZY J 0.1 25V Ceramic DUNTKD017DE12 (LC-20SH1X) C7302 RC-KZA213WJZZY J 4.7 25V Ceramic C7303 VCKYCY1HB332KY J 3300p 50V Ceramic SUB UNIT (Continued) C7304 VCCCCY1HH330JY J 33p...
Page 63 LC-20SH1M LC-20SH1X Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKD017DE09 (LC-20SH1M) R7767 VRD-RA2EE153JY J 15k 1/4W Carbon DUNTKD017DE12 (LC-20SH1X) R7768 VRS-CY1JF332JY J 3.3k 1/16W Metal Oxide R7769 VRS-CY1JF103JY J 10k 1/16W Metal Oxide SUB UNIT (Continued)
Page 64 LC-20SH1M LC-20SH1X Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKD018DE09 (LC-20SH1M) DUNTKD018DE09 (LC-20SH1M) DUNTKD018DE12 (LC-20SH1X) DUNTKD018DE12 (LC-20SH1X) R/C, LED UNIT OPERATION UNIT DIODES TRANSISTORS D4201 RH-EX0646GEZZY J Zener Diode Q4001 VSKRC104S//-1Y J KRC104S D4202 RH-EX0604GEZZY J Zener Diode...
Page 65: Inverter Unit
LC-20SH1M LC-20SH1X Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKD069FE03 C6743 VCKYCY1CB333KY J 0.033 16V Ceramic C6744 VCKYCY1CB333KY J 0.033 16V Ceramic INVERTER UNIT C6750 VCKYCY1EB104KY J 0.1 25V Ceramic C6751 VCKYCY1EB104KY J 0.1 25V Ceramic TRANSISTORS C6752 VCKYCY1EB104KY J 0.1...
Page 66 LC-20SH1M LC-20SH1X Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKD089FE09 (LC-20SH1M) DUNTKD069FE03 DUNTKD089FE12 (LC-20SH1X) INVERTER UNIT (Continued) MAIN UNIT TUNER HM6713 XG-BM14-30000 J Screw NOTE: THE PARTS HERE SHOWN ARE SUPPLIED AS AN HM6714 XG-BM14-30000 J Screw ASSEMBLY BUT NOT INDEPENDENTLY.
Page 67 LC-20SH1M LC-20SH1X Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKD089FE09 (LC-20SH1M) C420 VCEASX1CN106MY J 10 16V Electrolytic DUNTKD089FE12 (LC-20SH1X) C421 VCKYCY1EF104ZY J 0.1 25V Ceramic C501 VCEASX0JN226MY J 22 6.3V Electrolytic MAIN UNIT (Continued) C504 VCKYCY1EF104ZY J 0.1...
Page 68 LC-20SH1M LC-20SH1X Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKD089FE09 (LC-20SH1M) R114 VRS-CY1JF2R2JY J 2.2 1/16W Metal Oxide DUNTKD089FE12 (LC-20SH1X) R115 VRS-CY1JF2R2JY J 2.2 1/16W Metal Oxide R116 VRS-CY1JF103JY J 10k 1/16W Metal Oxide MAIN UNIT (Continued)
Page 69 LC-20SH1M LC-20SH1X Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKD089FE09 (LC-20SH1M) R826 VRS-CY1JF104JY J 100k 1/16W Metal Oxide DUNTKD089FE12 (LC-20SH1X) R827 VRS-CY1JF473JY J 47k 1/16W Metal Oxide R828 VRS-CY1JF101JY J 100 1/16W Metal Oxide MAIN UNIT (Continued)
Page 70: Cabinet And Mechanical Parts
QCNW-D477WJQZ J Connecting Cord QEARPA125WJFW J Grounding Part QEARZA041WJZZ J Grounding Part RCORFA032WJZZ J Ferrite Core VSP1104PB038A J Speaker, x2 TLABMB419WJZZ J Model Label (LC-20SH1M) AF TLABMB420WJZZ J Model Label (LC-20SH1X) XEBS940P20000 J Screw, x5 XEBSN30P08000 J Screw, x7 XEBSN40P10000 J Screw, x8...
Page 71 LC-20SH1M LC-20SH1X CABINET AND MECHANICAL PARTS Operation PWB 5-2-4 R/C, LED PWB 5-2-4 5-2-1 5-2-2 5-2-6 5-2-5 5-11 5-2-3 3-1-3 5-10 3-1-1 3-1-2 Inverter PWB Sub PWB Main PWB...
Page 72: Packing Parts
Code PACKING PARTS SUPPLIED ACCESSORIES (NOT REPLACEMENT ITEM) å QACCKA006WJPZ J AC Cord (LC-20SH1M) SPAKCB848WJZZ – Packing Case (LC-20SH1M) — å QACCLA022WJPZ J AC Cord (LC-20SH1X) SPAKCB899WJZZ – Packing Case (LC-20SH1X) — QCNWG0008CEPZ J Antenna Cable SPAKPA464WJZZ – Wrapping Paper —...
Page 73: Packing Of The Set
LC-20SH1M LC-20SH1X PACKING OF THE SET X4, X5 X1, X2...
Page 74 LC-20SH1M LC-20SH1X COPYRIGHT © 2005 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.

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