Sharp LC-121M2E Service Manual
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Sharp LC-121M2E Service Manual

Sharp LC-121M2E Service Manual

Lcd av monitor
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LC-121M2E
LC-150M2E
In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original
condition and only parts identical to those specified be used.
1. IMPORTANT SERVICE SAFETY PRECAUTION .................................................................................... 2
2. SPECIFICATIONS ................................................................................................................................... 3
3. PART NAMES .......................................................................................................................................... 4
4. DISASSEMBLY OF THE SET .................................................................................................................. 5
5. ADJUSTING PROCEDURE OF EACH SECTION ................................................................................... 7
6. INTEGRATED CIRCUIT TERMINAL ARRANGEMENTS ........................................................................ 18
7. TROUBLE SHOOTING ............................................................................................................................ 23
8. CHASSIS LAYOUT .................................................................................................................................. 26
9. SCHEMATIC DIAGRAM .......................................................................................................................... 28
10. BLOCK DIAGRAM ................................................................................................................................... 43
11. PRINTED WIRING BOARD ASSEMBLIES .............................................................................................. 45
12. REPLACEMENT PARTS LIST ................................................................................................................. 51
13. PACKING OF THE SET ........................................................................................................................... 63
The component parts of this model are partially different
depending on their suffix symbols. Before servicing the
units, be sure to check the suffix symbol on the model
label that is applied on the bottom side of the unit.

SERVICE MANUAL

MODELS
CONTENTS
SHARP CORPORATION
1
LCD AV MONITOR
LC-121M2E
LC-150M2E
Suffix symbol ( , K , X )
LC-121M2E
LC-121M2E
LC-150M2E
LC-150M2E
S19B4LC121M2E
Page

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Summary of Contents for Sharp LC-121M2E

  • Page 1: Table Of Contents

    LC-121M2E LC-121M2E LC-121M2E LC-150M2E LC-150M2E LC-150M2E SERVICE MANUAL S19B4LC121M2E LCD AV MONITOR LC-121M2E LC-150M2E MODELS In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified be used.

  • Page 2: Important Service Safety Precaution

    LC-121M2E LC-121M2E LC-150M2E LC-150M2E 1. IMPORTANT SERVICE SAFETY PRECAUTION æ Service work should be perfomed only by qualified service technicians who are thoroughly familiar with all safety checks and servicing guidelines which follow: WARNING Any reading of 0.3V RMS(this corresponds to 0.2 milliamp.

  • Page 3: Specifications

    35 W (Connected to AC Adapter) (LC-150M2E) Operating Temparature: –10°C~40°C 12.1" type Dimensions(LC-121M2E): 297.4 mm (W) × 264.6 mm (H) × 87 mm (D) (Includes Set Stand) 297.4 mm (W) × 264.6 mm (H) × 62.5 mm (D) (Not Include Set Stand) 15"...

  • Page 4: Part Names

    LC-121M2E LC-121M2E LC-150M2E LC-150M2E 3. PART NAMES...

  • Page 5: Disassembly Of The Set

    Cabinet B Push Cabinet B c WH Cabinet A b WH Cable Cabinet B Cabinet A 12 type 12 type CCABA2338CE01 GCABA2338CEKA CCABB2246CE01 GCABB2246CEKA (LC-121M2E/K) 15 type CCABA2343CE01 GCABA2343CEKA CCABB2246CE03 GCABB2246CEKA (LC-121M2X) 15 type CCABB2249CE01 GCABB2249CEKA (LC-150M2E/K) CCABB2249CE03 GCABB2249CEKA (LC-150M2X)
  • Page 6 12. Remove one screw (o) and remove the Sosu shield angle. 13. Remove four screws (p) which mounting the LCD display unit. 14. Spread bites of the LCD unit (a) out to be off from claws. 15. Remove the Lamp unit (s). Holder LHLDZ2082CEKZ (LC-121M2E) LHLDZ2085CEKZ (LC-150M2E)

  • Page 7: Adjusting Procedure Of Each Section

    LC-121M2E LC-121M2E LC-150M2E LC-150M2E 5. ADJUSTING PROCEDURE OF EACH SECTION The best adjustment is made before shipping. If any position deviation is found or after part replace is performed, adjust as follows. 5-1. Preparation for adjustment (1)Use the exclusive-use AC adapter or stable DC power supply.
  • Page 8 LC-121M2E LC-121M2E LC-150M2E LC-150M2E 5-3. Cancel of special mode Turn off the main unit power. 5-4. Preparation adjustment (1)Use the exclusive-use AC adapter or stable DC power supply. AC adapter: UADP-0181CEN1 DC power supply: 12 ± 0.5V 5-5. OSD menu indication and items in case of manual adjustment...
  • Page 9 LC-121M2E LC-121M2E LC-150M2E LC-150M2E PAL/SECAM OSC PAL BRIGHTNESS PAL UNICOLOR PAL SCOLOR PAL TINT BELL F0 B-Y BLACK LEVEL R-Y BLACK LEVEL SECAM BRIGHTNESS SECAM UNICOLOR SECAM COLOR SECAM TINT DVD NT BRIGHTNESS DVD NT UNICOLOR DVD NT COLOR DVD NT TINT...
  • Page 10 LC-121M2E LC-121M2E LC-150M2E LC-150M2E DAC 2 1ch Fixed DAC 2 2ch Fixed DAC 2 3ch Fixed DAC 2 4ch Fixed DAC 2 5ch Fixed DAC 2 6ch Fixed DAC 2 7ch Fixed DAC 2 8ch Fixed DAC 2 9ch Fixed...
  • Page 11 LC-121M2E LC-121M2E LC-150M2E LC-150M2E 5-6-2. AV input Adjustment Adjustment Adjustment conditions Adjustment method Brightness adjustment 1. Input the standard colour bar signal 1. Adjust N358 BRIGHTNESS, and (N358) (the same pattern as that of JPN-8CH) adjust the black level of G output so of N358 into AV1.
  • Page 12 LC-121M2E LC-121M2E LC-150M2E LC-150M2E B DRIVE adjustment 1. Input the standard colour bar signal 1. Adjust so as to get 100% white level (the same pattern as that of JPN- identical with that of green. 8CH) of N358 into AV1.
  • Page 13 LC-121M2E LC-121M2E LC-150M2E LC-150M2E Brightness adjustment 1. Input the standard colour bar signal 1. Adjust PAL BRIGHTNESS, and (PAL) of PAL into AV1. adjust the black level of G output 2. Connect oscilloscope to TP821 so as to get DC 1.5±0.05V.
  • Page 14 LC-121M2E LC-121M2E LC-150M2E LC-150M2E BELL f0 adjustment 1. Connect the oscilloscope to 1. Adjust BELL f0 so as to minimize the TP2851. a-level. Brightness adjustment 1. Input the standard colour bar signal 1. Adjust SECAM BRIGHTNESS, and (SECAM) (the same pattern as that of E-10CH) adjust the black level of G output to of SECAM into AV1.
  • Page 15 LC-121M2E LC-121M2E LC-150M2E LC-150M2E 5-6-3. Component input Adjustment Adjustment Adjusting conditions Adjusting method Brightness adjustment 1. From SG, input the 100% white colour Adjust DVD NT BRIGHTNESS, and (NTSC) bar signal of NTSC into conponent adjust the black level of G output so terminal.
  • Page 16 LC-121M2E LC-121M2E LC-150M2E LC-150M2E Brightness adjustment 1. From SG, input the 100% white colour Adjust DVD PAL BRIGHTNESS, and (PAL) bar signal of PAL into conponent adjust the black level of G output so terminal. as to get DC 1.5±0.05V.
  • Page 17 LC-121M2E LC-121M2E LC-150M2E LC-150M2E 5-7. Shipping setting (1)[Procedure] Holding down the [AV INPUT] key and [MENU] key, turn on the main power, and simultaneously press the (inspection process) [SELECT '] key and [VOL+] key to change the mode to the adjustment mode.

  • Page 18: Integrated Circuit Terminal Arrangements

    LC-121M2E LC-121M2E LC-150M2E LC-150M2E 6. INTEGRATED CIRCUIT TERMINAL ARRANGEMENTS 1. IC2001 (QFP, 80pins) Terminal No. Terminal name Function N. C – N. C – KEY3 Key input 3 KEY4 Key input 4 H PDET Headphon input pickup Audio selection 1...
  • Page 19 LC-121M2E LC-121M2E LC-150M2E LC-150M2E Terminal No. Terminal name Function “H” in PAL mode, “L” in other modes. N. C – N. C – N. C – SAFE Parking input Empty Empty Empty Empty Empty Empty N. C OSD blanking output N.
  • Page 20 LC-121M2E LC-121M2E LC-150M2E LC-150M2E 2. IC1201 (QFP, 128pins) Terminal No. Voltage Signal name Function 5.0V OSD_BK OSD Blanking input 5.0V OSD_R OSD R input 5.0V OSD_G OSD G input 5.0V OSD_B OSD B input 5.0V OSDVD OSD V output 5.0V...
  • Page 21 LC-121M2E LC-121M2E LC-150M2E LC-150M2E Terminal No. Voltage Signal name Function 3.3V HDCK SOURCE driver control signal output 1 3.3V SOURCE driver control signal output 2 3.3V 3.3V OOG1 G output 1 3.3V OOG0 G output 0 (LSB) 3.3V OOB7 B output 7 (MSB) 3.3V...
  • Page 22 LC-121M2E LC-121M2E LC-150M2E LC-150M2E Terminal No. Voltage Signal name Function 3.3V TST5 Test input 5 3.3V TST4 Test input 4 3.3V TST3 Test input 3 3.3V TST2 Test input 2 3.3V TST1 Test output 1 3.3V VCI horisontal sync signal input 3.3V...

  • Page 23: Trouble Shooting

    LC-121M2E LC-121M2E LC-150M2E LC-150M2E 7. TROUBLE SHOOTING Fluorecent lamp failure to light up. No picture, No sound Do F701 and F703 function? Does F702 function? Remove F701 and F703, and Check Q703 and its peripheral Are T701's secondary outputs, Does Q703 function? parts.
  • Page 24 LC-121M2E LC-121M2E LC-150M2E LC-150M2E No sound No sound (Front No sound No sound No sound and rear speaker) (AV1 output) (Front speaker) (Rear speaker) Check IC310, Are output at pin Is the pin 18 of Muting is applied. Is the pin 9 of Muting is applied.
  • Page 25 LC-121M2E LC-121M2E LC-150M2E LC-150M2E No colour appears No colour appears No colour appears No colour appears (N358) (N443,PAL) (PAL-M) (SECAM) Is 3.5795 MHz Check X801 and Is 4.4336 MHz Check X802 and Is 3.5756 MHz Check X803 and Is 4.4336 MHz...

  • Page 26: Chassis Layout

    LC-121M2E LC-121M2E LC-150M2E LC-150M2E 8. CHASSIS LAYOUT P751 IC2801 1H Dilay system TP805 P2002 IC853 P2001 IC801 Chroma decoder Digital comb filter T751 SECAM decoder T752 IC2802 TP804 X2850 Inverter transformer TP1106 TP1112 T701 IC1201 DC/DC Transformer Controller F701 TP1111 P402 1.25A 250V...
  • Page 27 LC-121M2E LC-121M2E LC-150M2E LC-150M2E • DESCRIPTION OF SCHEMATIC DIAGRAM 1. When the exclusive-use AC adapter is used, the color bar signal of color bar generator for service is input to get the normal screen. When the audio is minimized, the voltage value is measured with the 20 kΩ/V tester.
  • Page 28 LC-121M2E LC-121M2E LC-150M2E LC-150M2E 9. SCHEMATIC DIAGRAM: JACK UNIT...
  • Page 29 LC-121M2E LC-121M2E LC-150M2E LC-150M2E SCHEMATIC DIAGRAM: MAIN CIRCUIT (1)
  • Page 30 LC-121M2E LC-121M2E LC-150M2E LC-150M2E SCHEMATIC DIAGRAM: MAIN CIRCUIT (2), REMOTE CONTROL UNIT, SWITCH UNIT (LC-121M2E) AUDIO SELECTION 1 AUDIO SELECTION 2...
  • Page 31 LC-121M2E LC-150M2E AUDIO SELECTION 1 AUDIO SELECTION 2...

  • Page 32: Schematic Diagram

    LC-121M2E LC-150M2E SCHEMATIC DIAGRAM: MAIN CIRCUIT (2), REMOTE CONTROL UNIT, SWITCH UNIT (LC-150M2E)
  • Page 33 LC-121M2E LC-121M2E LC-150M2E LC-150M2E AUDIO SELECTION 1 AUDIO SELECTION 2...
  • Page 34 LC-121M2E LC-121M2E LC-150M2E LC-150M2E SCHEMATIC DIAGRAM: MAIN CIRCUIT (3) (LC-121M2E)
  • Page 35 LC-121M2E LC-150M2E...
  • Page 36 LC-121M2E LC-150M2E SCHEMATIC DIAGRAM: MAIN CIRCUIT (3) (LC-150M2E)
  • Page 37 LC-121M2E LC-121M2E LC-150M2E LC-150M2E...

  • Page 38: Block Diagram

    LC-121M2E LC-121M2E LC-150M2E LC-150M2E 10. BLOCK DIAGRAM IC312 IC310,311 IC308 IC305 Audio selection Sound control Lateral inversion Speaker Audio Amplifer Q306,307 IC304 AV2 SOUND L,R AV1 SOUND L,R COMPONENT SOUND L,R Q703 Switch IC704 PWM control AV2 picture AV2 input...
  • Page 39 LC-121M2E LC-121M2E LC-150M2E LC-150M2E 11. PRINTED WIRING BOARD ASSEMBLIES MAIN UNIIT (Component Side)
  • Page 40 LC-121M2E LC-121M2E LC-150M2E LC-150M2E MAIN UNIIT (Wiring Side)
  • Page 41 LC-121M2E LC-150M2E JACK/REMOTE CONTROL RECEPTOR/SWITCH UNIT REMOTE CONTROL RECEPTOR UNIT JACK P.W.B. Component Side Wiring Side Component Side Wiring Side SWITCH UNIT Component Side Wiring Side...
  • Page 42 LC-121M2E LC-121M2E LC-150M2E LC-150M2E - M E M O - Ref. No. Part No. Description Code Ref. No. Part No. Description Code...

  • Page 43: Printed Wiring Board Assemblies

    J 2SC2412KQ (NOT REPLACEMENT ITEM) Q303 VSUMG4/////-1 J UMG4 Q304 VSUMG4/////-1 J UMG4 Q305 VSDTC114EE/-1 J DTC114EE DUNTK9774DE03 — Main Unit(LC-121M2E) — Q306 VS2SC2412KQ-1 J 2SC2412KQ DUNTK9774DE04 — Main Unit(LC-150M2E) — Q307 VS2SC2412KQ-1 J 2SC2412KQ RUNTK0633CEZZ — Jack Unit —...
  • Page 44 C388 VCKYCY1HB222K J 2200p 50V Ceramic L702 RCiLC0130CEZZ J Coil, 100µH C389 VCEAPF1CW106M J 10 16V Electrolytic L703 RCiLC0130CEZZ J Coil, 100µH(LC-121M2E) C390 RC-EZ0538CEZZ J 330 16V Electrolytic L703 RCiLC0142CEZZ J Coil, 33µH(LC-150M2E) C391 VCEA2A0JW108M J 1000 6.3V Electrolytic L704 RCiLC0055CEZZ J Coil, 100µH...
  • Page 45 LC-121M2E LC-121M2E LC-150M2E LC-150M2E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTK9774DE03/04 C791 VCKYTV1CF105Z 16V Ceramic MAIN UNIT (Continued) C802 VCKYCY1HB222K J 2200p 50V Ceramic C803 VCCCCY1HH120J J 12p 50V Ceramic C415 VCEAPF1AW336M J 33...
  • Page 46 LC-121M2E LC-121M2E LC-150M2E LC-150M2E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTK9774DE03/04 C1134 VCEAPW0JN107M J 100 6.3V Electrolytic MAIN UNIT (Continued) C1136 VCEAPW0JN107M J 100 6.3V Electrolytic C1138 VCKYCY1CF104Z J 0.1 16V Ceramic C965 VCEAPH1CW106M J 10...
  • Page 47 LC-121M2E LC-121M2E LC-150M2E LC-150M2E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTK9774DE03/04 RESISTORS MAIN UNIT (Continued) R301 VRS-CY1JF332J J 3.3k 1/16W Metal Oxide AA R302 VRS-CY1JF682J J 6.8k 1/16W Metal Oxide AA C1265 VCKYCY1HB152K J 1500p 50V Ceramic...
  • Page 48 LC-121M2E LC-121M2E LC-150M2E LC-150M2E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTK9774DE03/04 R814 VRS-CY1JF512J J 5.1k 1/16W Metal Oxide AA MAIN UNIT (Continued) R815 VRS-CY1JF103J J 10k 1/16W Metal Oxide AA R816 VRS-CY1JF103J J 10k 1/16W Metal Oxide AA...
  • Page 49 LC-121M2E LC-121M2E LC-150M2E LC-150M2E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTK9774DE03/04 R1237 VRS-CY1JF102J J 1k 1/16W Metal Oxide AA MAIN UNIT (Continued) R1238 VRS-CY1JF123J J 12k 1/16W Metal Oxide AA R1239 VRS-CY1JF683J J 68k 1/16W Metal Oxide AA...
  • Page 50 LC-121M2E LC-121M2E LC-150M2E LC-150M2E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTK9774DE03/04 P752 QPLGN0155FJZZ J Plug, 3pin MAIN UNIT (Continued) P801 QPLGN0478GEZZ J Plug, 4pin P2001 QPLGN0578GEZZ J Plug, 5pin R2039 VRS-CY1JF101J J 100 1/16W Metal Oxide AA...
  • Page 51 LC-121M2E LC-121M2E LC-150M2E LC-150M2E Ref. No. Part No. Description Code Ref. No. Part No. Description Code RUNTK0634CEZZ RUNTK0635CEZZ REMOTE CONTROL UNIT SWITCH UNIT TRANSISTORS DIODES Q2001 VSDTC144EE/-1 J DTC144EE D2007 RH-EX0891CEZZ J Zener, EX0891CE D2008 RH-EX0891CEZZ J Zener, EX0891CE Q2001...
  • Page 52 LC-121M2E LC-121M2E LC-150M2E LC-150M2E CABINET EXPLODED VIEW Ref. No. Part No. Description Code Ref. No. Part No. Description Code 2-17 2-20 2-14 2-15 Switch Unit (RUNTK0635CEZZ) 2-16 2-11 2-21 2-24 LC-150M2E Main Unit (DUNTK9774DE01) Jack Unit (RUNTK0633CEZZ) 1-21 LC-121M2E 1-12...
  • Page 53 GLEGG9064CEZZ J Rubber Foot(LC-150M2E) (LC-121M2E/121M2E K ) TLABZ0716CEZZ J Pop Label CCABB2249CE03 J Cabinet B Ass’y (LC-121M2E K /E X / (LC-150M2E X ) 150M2E K /E X Only) CCABB2249CE01 J Cabinet B Ass’y PSLDM4504CEZZ J Copper Film(LC-150M2E) (LC-150M2E/150M2E K )
  • Page 54 Ref. No. Part No. Description Code PACKING PARTS SUPPLIED ACCESSORIES (NOT REPLACEMENT ITEM) ACCESSORIES SPAKF0400CEZZ — Packing Add.(LC-121M2E) — å QACCB0016TAZZ J AC Cable SPAKF0401CEZZ — Packing Add.(LC-150M2E) — (LC-121M2E K /150M2E K ) SPAKF0403CEZZ — Packing Add.(LC-121M2E) — å...

  • Page 55: Packing Of The Set

    SPAKX2881CEZZ(LC-150M2E) (Packing ADD.) RRMCG1459CESA (Remote Control) UADP-0181CEN1 (AC Adapter) QSOCZ0011FJZZ (21pin RCA Adapter) SPAKF0403CEZZ(LC-121M2E) SPAKF0418CEZZ(LC-150M2E) QACCB0016TAZZ (LC-121M2E K /150M2E K ) (Packing ADD.) QACCK0002TAZZ (LC-121M2E/150M2E) QACCL0020TAZZ (LC-121M2E X /150M2E X ) (AC Cable) QCNW-1335TAZZ (AV Cable) TLABN0157CEZZ LANGU9024CESA (No. Label)
  • Page 56 Code Ref. No. Part No. Description Code COPYRIGHT C 1999 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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