Daewoo L510B1 Service Manual

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Summary of Contents

Page 1 - Service Manual

DAEWOO ELECTRONICS CO., LTD.http : //svc.dwe.co.krService ManualXGA COLOR MONITORModel : L510B1September, 2001

Page 2 - CONTENTS

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

Page 3 - SAFETY PRECAUTIONS

9Control PanelHot KeyEXITAUTO MENUBRIGHTNESS• The AUTO button launches the AUTO TRACKING function directly.• The EXIT button turns the OSD (On-Screen

Page 4 - GENERAL SAFETY INFORMATION

10Key ProcessOSD OFFMENUEXITEXITMENUEXITMENUOSDOSDSHARPNESSSHARPNESSMENUUT L TYUT L TYUT L TY

Page 5 - SERVICING PRECAUTIONS

11Adjustment ProcedureAdjust the CLOCKcontrol.Perform the AUTOPOSITION.Is the H.Sizeproper?Is thenoise displayed onthe screen?Perform the AUTOTRACKING

Page 6

12Display horizontal & vertical frequency and polarity.STATUSReset the screen to the Factory Preset Display Settings.RECALLAUTO POSITIONChoose aut

Page 7 - ◆ Replacement

13Self DiagnosisWhen the monitor doesn’t display, if you press any key, Self Diagnosis screen is displayed. Self Diagnosisfunction checks if the sta

Page 8 - TECHNICAL INFORMATION

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

Page 9 - GENERAL INFORMATION

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

Page 10 - PIN CONNECTOR

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

Page 11 - OPERATION AND ADJUSTMENT

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

Page 12 - Key Process

SAFETY PRECAUTIONS 1GENERAL SAFETY INFORMATION 2SERVICING PRECAUTIONS 3TECHNICAL INFORMATION 6GENERAL INFORMATION 7PIN CONNECTOR 8CAUTIONS FOR ADJUSTM

Page 13 - Adjustment Procedure

184. One color is missingIs the OSD colornormal?One color is missingNoYesCheck the outputsignal of Scaler.NoYesIs the inputsignal normal?Check the vid

Page 14 - OSD Functions

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

Page 15 - Self Diagnosis

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

Page 16 - ALIGNMENT PROCEDURE

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.

Page 17 - TROUBLESHOOTING HINTS

22ASI320 Input Video Rate- H: 30~62kHz, V: 56~75Hz - Resolution: up to 1024*768 15PIN DSUBPRE-AMPControllerADCPLLOffset & amplifierBuff

Page 18 - 2. Trouble in Power on

23 24Main PCB Component SideMain PCB Solder SidePCB LAYOUT

Page 19 - 3. No Raster

25Control PCB Component Side Control PCB Solder Side

Page 20 - 4. One color is missing

26Power & D-Sub PCB Component SidePower & D-Sub PCB Solder Side

Page 21 - 5. No Video

27Main SectionSCHEMATIC DIAGRAM

Page 23 - 6. Power Problem

1SAFETY PRECAUTIONS◆ Safety CheckCare should be taken while servicing the inverter that generates the high voltage to lighten CCFL of theLCD panel. ◆

Page 24 - BLOCK DIAGRAM

29EXPLODED VIEW & MECHANICAL PARTS LIST

Page 25 - PCB LAYOUT

30RESISTOR DescriptionExample:CAPACITOR DescriptionExample:Fig &Part No DescriptionIndexCapacitorsC28 HCFK104ZBA Chip Cera 50V ZC63 HCB

Page 26

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

Page 27

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

Page 28 - SCHEMATIC DIAGRAM

33FB12 HFFTB2601B COIL CHIP BEAD TB321611Z260FB13 HFFTB2601B COIL CHIP BEAD TB321611Z260FB14 HFFTB2601B COIL CHIP BEAD TB321611Z260FB15 HFFTB2601B COI

Page 29 - SMPS Section

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

Page 30

DAEWOO ELECTRONICS CO., LTDD686, AHYEON-DONG MAPO-GUSEOUL, KOREAC.P.O. BOX 8003 SEOUL, KOREATELEX : DWELEC K28177-8CABLE : "DAEWOOELEC"

Page 31 - Abbreviation of Description

2GENERAL SAFETY INFORMATION◆ Terms in the manualCAUTION Statements identify conditions or practices that could result in damage to the equipment o

Page 32 - ELECTRICAL PARTS LIST

3SERVICING PRECAUTIONS◆ General Servicing Precautions1. Always unplug the AC power cord from the AC power source before:a. Removing or reinstalling an

Page 33

4◆ Electrostatically Sensitive (ES) DevicesSome semiconductor (solid state) devices can be damaged easily by static electricity.Such components are

Page 34

5FIGURE 1. USE SOLDERING IRON TO PRY LEADS◆ IC Removal/ReplacementSome utilized chassis circuit boards have slotted (oblong) holes through which the

Page 35

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

Page 36 - TELEX : DWELEC K28177-8

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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