Daewoo CML-523BM Service Manual

LCD COLOR MONITORModel : CML-523BMhttp://www.lucoms.com MAY. 2004Service ManualDAEWOO LUCOMS CO., LTD.

9Arrangement of 15-pin D-sub connectorPin Signal1 Red2 Green3 Blue4 GND5 GND6 GND - Red7 GND - Green8 GND - Blue9 +5Vdc10 GND - H.Sync11 GND - V.Sync1

10OPERATION AND ADJUSTMENTControl Panel<< L523BM >>*( ): Hot KeySwitches the monitor on andoff.Shows both normal operation andpower ma

11OPERATION AND ADJUSTMENTKey ProcessOSD OFFOSDOSD1024X768 60K 75UTILITYUTILITYUTILITYSHARPNESSSHARPNESSWhen there is no OSD, if you press t

12Adjustment ProcedureOPERATION AND ADJUSTMENTAdjust the CLOCKcontrol.Perform the AUTOPOSITION.Is the H.Sizeproper?Is thenoise displayed onthe screen?

13OPERATION AND ADJUSTMENTAdjust the blue color.Adjust the red color.AUTO TRACKINGAdjust the horizontal & vertical picture image quality and size.

14OPERATION AND ADJUSTMENTSelect language for OSD (6 languages).LANGUAGEChoose automatically the proper horizontal position and vertical position &

15Self DiagnosisIf there is no image, the Self Diagnosis screen will be displayed. Self Diagnosis function checks if thestatus of the monitor screen

16Standard Check point1. Power source : 100 - 240Vac, 50/60Hz.2. Aging : Take at least 20 minutes warm-up time.3. Signal• Video input : Analog 0.7Vpp

17TROUBLESHOOTING HINTSIs a inputH-sync of Scaler(pin 126, U6) correct?Abnormal modedetectNoYesTrouble in the H-syncinput circuit.Trouble in Scaler(U6

18TROUBLESHOOTING HINTS NoNoYesYesIs Vcc 5V line normal(pin 8 of CON1)?Trouble in Scaler(U6).Check the power board(Vcc 5V of CN2A).Check on Scaler(U6)

SAFETY PRECAUTIONS 2GENERAL SAFETY INFORMATION 3SERVICING PRECAUTIONS 4TECHNICAL INFORMATION 8GENERAL INFORMATION 8PIN CONNECTOR 9CAUTIONS FOR ADJUSTM

19TROUBLESHOOTING HINTS3. No RasterIs 12Vplugged in pin5 of CN2(power board)?NoNoYesYesIs the output ofinverter correct?Check the output of D811 12V l

20TROUBLESHOOTING HINTS4. One color is missingIs the OSD colornormal?One color is missingNoYesCheck the outputsignal of Scaler.NoYesIs the inputsignal

21TROUBLESHOOTING HINTS5. No VideoHas display imageonly white?NoYesNext page.NoYesConnection trouble. Check the output of scalier(pin LAV 0P~3P, 0M~3M

22TROUBLESHOOTING HINTSIs OSD normal?BlackNoNoYesIs the contrastat its maximum? 3. No rasterSet the contrast up to Max.YesYesCheck Ifthe CON3 wafer is

23TROUBLESHOOTING HINTSNoYesYesCheck 5V, 3.3V, 12V of CN4.Check the main board.Is the power cord well connected?Check if the power cord is correctlyco

24TROUBLESHOOTING HINTSIsAudio-in OK?(pin 10, 14 at U7)No SoundNoNoYesYesIs VCC(Pin15,16)of Audio IC(U7)12V? Check Audio-injack(J1).Check speaker.NoYe

25BLOCK DIAGRAM

SCHEMATIC DIAGRAM(L523BM)26

SCHEMATIC DIAGRAM27

SCHEMATIC DIAGRAM28

2SAFETY PRECAUTIONS◆ Safety CheckCare should be taken while servicing the inverter that generates the high voltage to lighten CCFL of theLCD panel. ◆

SCHEMATIC DIAGRAM29

SCHEMATIC DIAGRAM30

31SCHEMATIC DIAGRAM

32SCHEMATIC DIAGRAM

33SCHEMATIC DIAGRAM

34PCB PATTERN

35PCB PATTERN

36PCB PATTERN

37PCB PATTERN

38RESISTOR DescriptionExample:CAPACITOR DescriptionExample:Fig &Part No DescriptionIndexCapacitorsC28 HCFK104ZBA Chip Cera 50V ZC63 HCB

3GENERAL SAFETY INFORMATION◆ Terms in the manualCAUTION Statements identify conditions or practices that could result in damage to the equipment o

ELECTRICAL PARTS LIST39Z1010 PCFMCAG204 COVER FRONT AS CML-523BM-4LCA001 99707K0002 CONN AS 12507HS-20+12507HS-20+1571#30=80LCD 9979615051 LCD PANEL L

C1 HCFK104ZBA C CHIP CERA 50V Y5V 0.1MF Z 1608C10 HCEEF101MD C CHIP ELECTRO MV 16V 100MF M 6.3DX5.7HC11 HCFK104ZBA C CHIP CERA 50V Y5V 0.1MF Z 1608C12

ELECTRICAL PARTS LIST41C62 HCEKF100MC C CHIP ELECTRO MV 16V 10MF D4.0XH5.2C63 HCFK104ZBA C CHIP CERA 50V Y5V 0.1MF Z 1608C64 HCFK104ZBA C CHIP CERA 50

L5 HFFHH1M601 COIL CHIP BEAD HH-1M3216-601JTL6 HFFHH1M601 COIL CHIP BEAD HH-1M3216-601JTL7 HFFHH1M601 COIL CHIP BEAD HH-1M3216-601JTL8 HFFHH1M601 COIL

ELECTRICAL PARTS LIST43R55 HRFS750JBA R CHIP 1/16 75 OHM J 1608R56 HRFS750JBA R CHIP 1/16 75 OHM J 1608R57 HRFS750JBA R CHIP 1/16 75 OHM J 1608R58 HRF

YR070 99729250A1 STAND AS CML-520B STAND ASYR080 7173301012 SCREW TAPTITE TT2 BIN 3X10 MFZN BKYR090 7S103B4081 SCREW SPECIAL M/C BIN 4*8 MFZNZ1030 PCP

4SERVICING PRECAUTIONS◆ General Servicing Precautions1. Always unplug the AC power cord from the AC power source before:a. Removing or reinstalling an

5SERVICING PRECAUTIONS◆ Electrostatically Sensitive (ES) DevicesSome semiconductor (solid state) devices can be damaged easily by static electricity.

6SERVICING PRECAUTIONSFIGURE 1. USE SOLDERING IRON TO PRY LEADS◆ IC Removal/ReplacementSome utilized chassis circuit boards have slotted (oblong) ho

7◆ Diode Removal/Replacement1. Remove defective diode by clipping its leads as close as possible to diode body.2. Bend the two remaining leads perpen

8TECHNICAL INFORMATIONPanel Size 15-inch (38cm) diagonalPixel Pitch 0.297 x 0.297mmViewing Angle 70°(Right/Left)70°(up), 60°(down)Contrast Ratio 3