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Daewoo Lucoms CML-523BM, Service Manual

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Daewoo Lucoms CML-523BM Service Manual Download Page 1

LCD COLOR MONITOR

Model : CML-523BM

http://www.lucoms.com           MAY. 2004

Service Manual

DAEWOO LUCOMS CO., LTD.

Summary of Contents for CML-523BM

Page 1: ...LCD COLOR MONITOR Model CML 523BM http www lucoms com MAY 2004 Service Manual DAEWOO LUCOMS CO LTD...

Page 2: ...INFORMATION 8 GENERAL INFORMATION 8 PIN CONNECTOR 9 CAUTIONS FOR ADJUSTMENT AND REPAIR 9 OPERATION ADJUSTMENT 10 ALIGNMENT PROCEDURE 16 TROUBLESHOOTING HINTS 17 BLOCK DIAGRAM 25 SCHEMATIC DIAGRAM 26 P...

Page 3: ...oltage circuit area if a short circuit is found replace all parts which have been overheated as a result of the short circuit All the protective devices must be reinstalled per original design Solderi...

Page 4: ...nts indicate a personal injury hazard not immediately accessible as one reads the marking or a hazard which is properly included on the equipment itself WARNING Statements are clearly concerning indic...

Page 5: ...ume Aceton and 90 by volume isopropyl alchohol 90 99 strength 5 Do not apply AC power to this instrument and or any other of its electrical assemblies unless all the solid state device heat sinks are...

Page 6: ...h leads electrically shorted together by conductive foam aluminum foil or comparable conductive material 7 Immediately before removing the protective material from the leads of replacement ES devices...

Page 7: ...in the circuit board 2 Carefully bend each IC lead against the circuit foil pad and solder it 3 Clean the soldered areas with a small wire bristle brush lt is not necessary to reapply acrylic coating...

Page 8: ...he circuit board 3 Observing diode polarity wrap each lead out of the new diode around the corresponding lead on the circuit board 4 Securely crimp each connection and solder it 5 Inspect the solder j...

Page 9: ...768 75Hz Colors 16 2M Colors Display Area 304 1mm x228 1mm PC Input Signal Sync H V separate TTL Video 15 pin mini D sub Analog RGB Audio Stereo MiniJack Input Output Speaker Max Output 2W Left 1W Ri...

Page 10: ...REPAIR This TFT LCD monitor automatically scans all horizontal frequencies from 30KHz to 62KHz This TFT LCD monitor supports IBM PC PC XT PC AT personal System 2 PS 2 Apple Macintosh and compatible u...

Page 11: ...value of any selected function Moves cursor to the left or high window in the OSD window and decreases value of any selected function EXIT POWER LIGHT MENU 6 5 Turns the OSD On Screen Display window o...

Page 12: ...OSD if you press this BRIGHTNESS button you can adjust the brightness directly decreases brightness increases brightness AUTO TRACKING The screen will be brightened progressively by 10 If you carry ou...

Page 13: ...Perform the AUTO POSITION Is the H Size proper Is the noise displayed on the screen Perform the AUTO TRACKING Is the noise displayed on the screen yet Is the noise displayed on the screen yet Adjust t...

Page 14: ...L OSD Functions Adjust the display image quality if the screen proceed to scaling up SHARPNESS B Adjust the OSD position horizontally left or right and vertically up or down OSD POSITION OSD Choose di...

Page 15: ...6 languages LANGUAGE Choose automatically the proper horizontal position and vertical position size of the screen image AUTO POSITION Adjust the contrast of image the difference between light and dark...

Page 16: ...D Sub signal connector is not connected or the status of the monitor is on DPMS mode Out of Range screen is displayed when the applied frequency is under or over normal range Normal range Non interlac...

Page 17: ...uency 15 Horizontal 30KHz 62KHz Vertical 50Hz 75Hz available only non interlace mode Adjustment 1 Sharpness set to 0 2 Contrast set to 100 3 Brightness set to 100 4 Switching to factory alignment mode...

Page 18: ...HOOTING HINTS Is a input H sync of Scaler pin 126 U6 correct Abnormal mode detect No Yes Trouble in the H sync input circuit Trouble in Scaler U6 Yes 1 Abnormal mode detect 1 1 Abnormal mode detect fo...

Page 19: ...Vcc 5V of CN2A Check on Scaler U6 Is the Power LED toggled between on and off Off No Yes On Is the power cord well connected Refer to No video or No raster Check if the power switch is on position and...

Page 20: ...d in pin5 of CN2 power board No No Yes Yes Is the output of inverter correct Check the output of D811 12V line power board Replace the inverter Replace a LCD panal Check the output of Q1 or pin 15 of...

Page 21: ...output signal of Scaler No Yes Is the input signal normal Check the video signal cable or R G B con ass y Trouble in the soldering of R G B data lines from output of Scaler to Scaler U6 Yes No Yes Are...

Page 22: ...ite No Yes Next page No Yes Connection trouble Check the output of scalier pin LAV 0P 3P 0M 3M and soldering of CON3 No Yes Is pin 1 of U2 3 3V Check U2 its ambient circuit and pin 14 of U8 Check if t...

Page 23: ...contrast at its maximum 3 No raster Set the contrast up to Max Yes Yes Check If the CON3 wafer is well connected at the LCD panel No Yes Is the output of Scaler correct No Yes Is the input of Scaler...

Page 24: ...23 TROUBLESHOOTING HINTS No Yes Yes Check 5V 3 3V 12V of CN4 Check the main board Is the power cord well connected Check if the power cord is correctly connected Power problem Yes 6 Power Problem...

Page 25: ...dio in OK pin 10 14 at U7 No Sound No No Yes Yes Is VCC Pin15 16 of Audio IC U7 12V Check Audio in jack J1 Check speaker No Yes Is Audio out OK Check VCC 12V line Is Mute ON Change Mute OFF Yes No Che...

Page 26: ...25 BLOCK DIAGRAM...

Page 27: ...SCHEMATIC DIAGRAM L523BM 26...

Page 28: ...SCHEMATIC DIAGRAM 27...

Page 29: ...SCHEMATIC DIAGRAM 28...

Page 30: ...SCHEMATIC DIAGRAM 29...

Page 31: ...SCHEMATIC DIAGRAM 30...

Page 32: ...31 SCHEMATIC DIAGRAM...

Page 33: ...32 SCHEMATIC DIAGRAM...

Page 34: ...33 SCHEMATIC DIAGRAM...

Page 35: ...34 PCB PATTERN...

Page 36: ...35 PCB PATTERN...

Page 37: ...36 PCB PATTERN...

Page 38: ...37 PCB PATTERN...

Page 39: ...0 5 F 1pF J 5 K 10 P 100 0 Z 80 Fig Part No Description Index R101 Resistors RD 4Z820J Carbon 82J R30 HRFS472JBA Chip 4 7K OHM J Tolerance F 1 J 5 K 10 M 20 G 2 Important Safety Notice Components iden...

Page 40: ...PTITE TT2 BIN 3X6 MFZN YF070 7173300611 SCREW TAPPTITE TT2 BIN 3X6 MFZN YF080 7173300611 SCREW TAPPTITE TT2 BIN 3X6 MFZN YF090 7S103B30B1 SCREW SPECIAL M C BIN 3 8 TW B MFZN YF100 9978300038 SPEAKER A...

Page 41: ...50V CH 22PF J 1608 C35 HCFK104ZBA C CHIP CERA 50V Y5V 0 1MF Z 1608 C36 HCEDC470MC C CHIP ELECTRO MV 6 3V 47MF 5DX5 2H C37 HCQK220JBA C CHIP CERA 50V CH 22PF J 1608 C38 HCFK104ZBA C CHIP CERA 50V Y5V 0...

Page 42: ...D105ZBA C CHIP CERA Y5V 10V 1MF Z 1608 C84 HCBK102KBA C CHIP CERA 50V X7R 1000PF K 1608 C85 HCQK200JBA C CHIP CERA 50V CH 20PF J 1608 C86 HCQK200JBA C CHIP CERA 50V CH 20PF J 1608 C87 HCQK200JBA C CHI...

Page 43: ...16 4 7K OHM J 1608 R27 HRFS103JBA R CHIP 1 16 10K OHM J 1608 R28 HRFS473JBA R CHIP 1 16 47K OHM J 1608 R29 HRFS473JBA R CHIP 1 16 47K OHM J 1608 R3 HRFS102JBA R CHIP 1 16 1K OHM J 1608 R30 HRFS101JBA...

Page 44: ...18PF Z2030 PCPLSWG190 PCB CONTROL AS CML 523BMW L CA201 9970790113 CONN AS SMH200 YBNH200 1007 26 1354 28 350 LED1 DSD50GYW LED SD50GYW GREEN AMBER W5 9979220084 CONN WAFER SMAW200 03 68163 0310 W6 9...

Page 45: ...9919310000 LABEL BARCODE E ART PAPER COM IMPRINTABLE YP060 9978634606 MANUAL INSTRUCTION CML 523BM L DTE FRANCE EN FR YP061 W3415M731 CORD POWER C5 H03VV F 3X0 75 1 8M BK YP063 9970800072 CABLE SIGNAL...

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