Daewoo CML-710 Service Manual

LCD COLOR MONITORModel : CML-710http://www.lucoms.com 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

10<< L710 >>OPERATION AND ADJUSTMENTPOWER LIGHTMENU/EXITSwithes the monitor on andoff.Shows both normal operationand power management st

11OPERATION AND ADJUSTMENTKey ProcessMENUEXITEXITEXITOSDOSDSHARPNESSSHARPNESSUT L TYUT L TYUT L TY1280X1024 80K 75SELECTSELECT

When there is no OSD, if you press thisBRIGHTNESS button, you can adjustthe brightness directly.: decreases brightness : increases brightness12When

13OPERATION AND ADJUSTMENTAdjustment ProcedureAdjust the CLOCKcontrol.Perform the AUTOPOSITION.Is the H.Sizeproper?Is thenoise displayed onthe screen?

14OPERATION AND ADJUSTMENTDisplay horizontal & vertical frequency and polarity.STATUSReset the screen to the Factory Preset Display Settings.RECAL

15OPERATION AND ADJUSTMENTSelf DiagnosisIf there is no image, the Self Diagnosis screen will be displayed. Self Diagnosis function checks if thestat

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 HINTS (L710)1. Abnormal mode detectIs a inputH-sync of Scaler(pin126, U6) correct?Abnormal modedetectNoYesTrouble in the H-syncinput

18TROUBLESHOOTING HINTS2. Trouble in Power onNoNoYesYesIs VCC5V line normal(pin 8 of CON1)?Trouble in Scaler(U6)Check the power board(VCC5V of CON2).C

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

19TROUBLESHOOTING HINTS3. No RasterIs 12Vplugged in pin 5 of CN2(power board)?NoNoYesYesIs the output ofinverter correct?Check the output of 12V line(

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 interfacescalier pin LAV (0P~3P, 0M~3M) an

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

23TROUBLESHOOTING HINTSNoYesYesCheck +3.3V, +5V, +12Vof CN2.Check the main board.Is the power cord well connected?Check if the power cord is correctly

24BLOCK DIAGRAM

25SCHEMATIC DIAGRAM(L710)

26SCHEMATIC DIAGRAM

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

30PCB PATTERN

31PCB PATTERN

32PCB PATTERN

33PCB PATTERN

34RESISTOR DescriptionExample:CAPACITOR DescriptionExample:Fig &Part No DescriptionIndexCapacitorsC28 HCFK104ZBA Chip Cera 50V ZC63 HCB

ELECTRICAL PARTS LIST (L710)35Z1010 PCFMCAJ267 COVER FRONT AS CML-710CA001 9970703003 CONN AS 12507HS-30+FI-X30H+1571#30=120LCD 9979617103 LCD PANEL L

C40 HCQK101JBA C CHIP CERA 50V CH 100PF J 1608C41 HCQK471JBA C CHIP CERA 50V CH 470PF J 1608C42 HCFK104ZBA C CHIP CERA 50V Y5V 0.1MF Z 1608C43 HCFK104

ELECTRICAL PARTS LIST37L2 HFFHH1M601 COIL CHIP BEAD HH-1M3216-601JTL3 HFFHH1M601 COIL CHIP BEAD HH-1M3216-601JTL4 HFFHH1M601 COIL CHIP BEAD HH-1M3216-

R6 HRFS472JBA R CHIP 1/16 4.7K OHM J 1608R60 HRFS101JBA R CHIP 1/16 100 OHM J 1608R61 HRFS000JBA R CHIP 1/16 0 OHM J 1608R62 HRFS000JBA R CHIP 1/16

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

ELECTRICAL PARTS LIST39SW904 5S50101Z10 SW TACT KPT-1115AMSW905 5S50101Z10 SW TACT KPT-1115AMSW906 5S50101Z10 SW TACT KPT-1115AMSW907 5S50101Z10 SW TA

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 17-inch (43.2 cm) diagonal Pixel Pitch 0.264 x 0.264mmViewing Angle 70°(Right/Left)60°(up), 60°(down)Contrast Ratio