DAEWOO ELECTRONICS CO., LTD.http : //svc.dwe.co.krService ManualXGA COLOR MONITORModel : L510B1September, 2001
8Arrangement of 15-pin D-sub connectorPin Signal1 Red2 Green3 Blue4 GND5 GND6 GND - Red7 GND - Green8 GND - Blue9+5Vdc10 GND - H.Sync11 GND - V.Sync12
9Control PanelHot KeyEXITAUTO MENUBRIGHTNESS• The AUTO button launches the AUTO TRACKING function directly.• The EXIT button turns the OSD (On-Screen
10Key ProcessOSD OFFMENUEXITEXITMENUEXITMENUOSDOSDSHARPNESSSHARPNESSMENUUT L TYUT L TYUT L TY
11Adjustment ProcedureAdjust the CLOCKcontrol.Perform the AUTOPOSITION.Is the H.Sizeproper?Is thenoise displayed onthe screen?Perform the AUTOTRACKING
12Display horizontal & vertical frequency and polarity.STATUSReset the screen to the Factory Preset Display Settings.RECALLAUTO POSITIONChoose aut
13Self DiagnosisWhen the monitor doesn’t display, if you press any key, Self Diagnosis screen is displayed. Self Diagnosisfunction checks if the sta
14Standard Check point1. Power source : 100 - 240Vac, 50/60Hz.2. Aging : Take at least 20 minutes warm-up time.3. SignalVideo input : Analog 0.7Vpp 75
151. Abnormal mode detectIs a inputH-sync of ADC(pin 90, U2) correct?Abnormal modedetectNoNoYesYesIs waveform of pin 81 of ADC(U2) correct?Trouble in
162. Trouble in Power onNoNoYesYesIs 5VS line normal(pin 8 of CN2)?Trouble in U6 & Q5and its ambient circuit.Check the power board(5VS of CN2A).Ch
173. No RasterIs 12Vplugged in pin 1 of CN4A(power board)?NoNoYesYesIs the output ofinverter correct?Check the output of D811(power board).Replace the
SAFETY PRECAUTIONS 1GENERAL SAFETY INFORMATION 2SERVICING PRECAUTIONS 3TECHNICAL INFORMATION 6GENERAL INFORMATION 7PIN CONNECTOR 8CAUTIONS FOR ADJUSTM
184. One color is missingIs the OSD colornormal?One color is missingNoYesCheck the outputsignal of Scaler.NoYesIs the inputsignal normal?Check the vid
195. No VideoHas display imageonly white?NoYesNext page.NoYesConnection trouble. Check the output of scalier(pin 71, 72, 73, 74, 75)and soldering of C
20Is OSD normal?BlackNoNoYesYesIs the contrastat its maximum? 3. No rasteror Check SDRAM.Set the contrast up to Max.Next Page.YesNoYesIs the output of
21NoNoYesYesCheck 5VS, 5VD, 5VA, 6V, 3.3V of CN2A.Check the main board.Is the power cord well connected?Check if the power cord is correctlyconnected.
22ASI320 Input Video Rate- H: 30~62kHz, V: 56~75Hz - Resolution: up to 1024*768 15PIN DSUBPRE-AMPControllerADCPLLOffset & amplifierBuff
23 24Main PCB Component SideMain PCB Solder SidePCB LAYOUT
25Control PCB Component Side Control PCB Solder Side
26Power & D-Sub PCB Component SidePower & D-Sub PCB Solder Side
27Main SectionSCHEMATIC DIAGRAM
SMPS Section28
1SAFETY PRECAUTIONS◆ Safety CheckCare should be taken while servicing the inverter that generates the high voltage to lighten CCFL of theLCD panel. ◆
29EXPLODED VIEW & MECHANICAL PARTS LIST
30RESISTOR DescriptionExample:CAPACITOR DescriptionExample:Fig &Part No DescriptionIndexCapacitorsC28 HCFK104ZBA Chip Cera 50V ZC63 HCB
3100020 W3415M731- CORD POWER C5 H03VV-F 3X0.75 1.8M BK00040 9970800035 CABLE SIGNAL AS 15P+15P/DDC=1.5M(GY275A)B801 5PB13857-- COIL BEAD BI3857(AXIAL
32C69HCEDC470MCC CHIP ELECTRO MV 6.3V 47MF 5DX5.2HC7 HCFK104ZBA C CHIP CERA 50V Y5V 0.1MF Z 1608C70HCEDC470MCC CHIP ELECTRO MV 6.3V 47MF 5DX5.2HC71HCE
33FB12 HFFTB2601B COIL CHIP BEAD TB321611Z260FB13 HFFTB2601B COIL CHIP BEAD TB321611Z260FB14 HFFTB2601B COIL CHIP BEAD TB321611Z260FB15 HFFTB2601B COI
34R69 HRFS472JBA R CHIP 1/16 4.7K OHM J 1608R72 HRFS102JBA R CHIP 1/16 1K OHM J 1608R73 HRFS102JBA R CHIP 1/16 1K OHM J 1608R80 RD-AZ302J- R CARBON
DAEWOO ELECTRONICS CO., LTDD686, AHYEON-DONG MAPO-GUSEOUL, KOREAC.P.O. BOX 8003 SEOUL, KOREATELEX : DWELEC K28177-8CABLE : "DAEWOOELEC"
2GENERAL SAFETY INFORMATION◆ Terms in the manualCAUTION Statements identify conditions or practices that could result in damage to the equipment o
3SERVICING PRECAUTIONS◆ General Servicing Precautions1. Always unplug the AC power cord from the AC power source before:a. Removing or reinstalling an
4◆ Electrostatically Sensitive (ES) DevicesSome semiconductor (solid state) devices can be damaged easily by static electricity.Such components are
5FIGURE 1. USE SOLDERING IRON TO PRY LEADS◆ IC Removal/ReplacementSome utilized chassis circuit boards have slotted (oblong) holes through which the
6◆ Diode Removal/Replacement1. Remove defective diode by clipping its leads as close as possible to diode body.2. Bend the two remaining leads perpen
7This TFT LCD monitor automatically scans all horizontal frequencies from 30KHz to 62KHz, and allvertical frequencies from 50Hz to 75Hz. This TFT LCD
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