Daewoo 103FH Service Manual Page 1

DAEWOO ELECTRONICS CO., LTD.http : //svc.dwe.co.krService ManualXGA COLOR MONITORModel : 103FHNovember, 2000

PIN CONNECTORCAUTIONS FOR ADJUSTMENT AND REPAIR• Degaussing is always required when adjusting purity or convergence.• The white balance adjustment has

OPERATION & ADJUSTMENT9Control Panel• Move cursor to the right window on the OSD window.• Increase the value of any selected function.• Move curso

10DEUTSCHENGL SHESPAÑOLFRANCA STAL ANOKey ProcessStart MENU•When you choose the icon on the OSD window, you can exit the OSD screen.

11Adjust the vertical picture moire cancellation.V. MOIREAdjust the focus image.FOCUSH.CONVERGENCEAdjust the horizontal convergence image.V.CONVERGENC

12ZOOMAdjust the display width & height at the same time.Adjust the left and right margins for more convex or more concave margins.Adjust the trap

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

Standard Adjustment Conditions1. Power source voltage : AC 100 - 240Vac, 50/60Hz.2. Aging : Take at least 15 minutes warm-up time.3. Signals.Video : A

15(l) Select the B - GAIN and adjust the / key to get the color coordinates in Y=0.311±0.015.(m) Select the R - GAIN and adjust the / key to get

16TROUBLESHOOTING HINTS1. No CharacterAre theContrast &Brightness Controlsmaximum?Change the Contrast &Brightness control value tomaximumNo Ra

172. No RasterTrouble inpower supplycircuitTrouble in videocircuitTrouble in G1line of Main PCBTrouble in HVGTrouble in G2 of HVGTrouble in 80Vdcline

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

183. A missing ColorIs input signalnormal?One color ismissingIs CRTCathode (Rk, Gk, Bk)normal?Is videooutput IC803 waveformnormal?Each grid (G1, G2)vo

194. Abnormal OSD FontIs menukey selected?Is OSD Fontexist?* If menu key selected.Is theFast Blanking signalnormal?Abnormal OSD FontIs theoutput of IC

205. Horizontal Output CircuitIs theB+ line voltagenormal?Is Q505 basewaveformnormal?Refer to abnormal H.Size.Trouble in Q505.Trouble in Horizontalout

216. Unstable Picture6-1. HorizontalUnstablepictureIs the pulse of pin26 of the IC501correct?Trouble in IC501 or its ambient circuits.Is the pulse of

226-2. V.OSC/Deflection CircuitUnstable orAbnormal pictureIs+17Vdc, -13Vdc linecorrect?1. Trouble in P.S.U.2. Check the D108(-13Vdc), Q106(+17Vdc)

237. FocusMonitor remainsunfocusedAdjust finelyFocus VR in HVGIsfocusacceptable?Trouble in Focuscircuit (HVG)Refer to focus is poor.YesNoOKNo

247-1. Dynamic FocusFocus is poorIs thewaveform of theDF pin in HVG (pin 1)correct? HITACHI : 450V 180VSAMSUNG : 370V 180V1. Check the CRT so

258. ConvergenceIsconvergenceon the center areabad?Isconvergence on thefringe area bad?Adjust staticconvergenceRefer toAdjustmentprocedure ofconvergen

269. Abnormal Picture9-1. Horizontal SizeIs thechangeable theB+ line voltage?Is thegate voltageof the Q521correct?OKTrouble in D507, D520.AbnormalH. S

279-2. Vertical SizeIschangeable theDC voltage ofIC401 pin 1?Trouble inR401, C401.Check the IC501 andits ambient circuit1. Trouble in IC401.2. Check t

1◆ Safety CheckCare should be taken while servicing this analog color display because of the high voltages used in thedeflection circuits. These volta

2810. High Voltage Output CircuitTrouble in R628, R629.NoYesIs the value of the R622 correct?NoYesYesTrouble in H.V output circuitTrouble in HVGRefer

2911. Side-Pincushion CircuitSide-Pincusion distortionis excessive or barrelO.KYesCheck IC504 orits ambient circuit.Is the waveform of pin9 inIC501cor

3012. Power Supply Unit (P.S.U)Is theTH001 OK?Is TR Q003OK?1. Replace Q003.2. Replace TH001.NoIsvoltage of T001pin 1 130V(370V)?Trouble in bridge diod

31Is voltageof C12812Vdc?Trouble in IC103.NoIs voltageof C107 28Vdc?NoYesYesYesIs voltage of C111 17Vdc?Trouble in Q106, D106.P.S.U O.KTrouble in D105

32BLOCK DIAGRAM RGB HV RGB RGB G1 HV H/V G3-2 G3-1 G2 PFC(OPTION) +226V +185V

33PCB LAYOUTMain PCB Component Side

34Main PCB Solder Side

35Video PCB Component Side

36Video PCB Solder Side

37Control PCB Component SideControl PCB Solder Side

2Warning: This product includes critical mechanical and electrical parts which are essential for x rayprotection. For continued safety, replace critic

38Socket PCB Component SideSocket PCB Solder Side

39SCHEMATIC DIAGRAMPower & PFC Circuit

40MCU OSD Key Deflection Dynamic Circuit

41Deflection & H/V Circuit

42Video & Vertical & Convergence & Tilt Circuit

EXPLODED VIEW & MECHANICAL PARTS LIST43

RESISTOR DescriptionExample:CAPACITOR DescriptionExample:Important Safety NoticeComponents identified with the International Symbol have special chara

00020 9979500017 RECEPTACLE 03GEEG3B-SL/FILTER EMI00020 W3475N731- CORD POWER 3 H05VV-F 3X0.75 1.8 IV00030 9970800018 CABLE SIGNAL AS 15P+2C/DDC=1.5M(

46C124 CMXM2A104J C MYLAR 100V 0.1MF J (TP)C125 CEXF1C101C C ELECTRO 16V RUS 100MF (6.3X11) TPC127 HCBK104KCA C CHIP CERA 50V X7R 0.1MF K 2012C128 HCB

47C516 CEXF1C471C C ELECTRO 16V RUS 470MF (10X12.5)TPC517 HCQK102JCA C CHIP CERA 50V CH 1000PF J 2012C518 CEXE1H229C C ELECTRO 50V RU 2.2MF (5X11) TPC

SERVICING PRECAUTIONS3◆ General Servicing Precautions1. Always unplug the AC power cord from the AC power source before:a. Removing or reinstalling an

48C803 HCBK103KCA C CHIP CERA 50V X7R 0.01MF K 2012C8031 HCBK103KCA C CHIP CERA 50V X7R 0.01MF K 2012C8032 CEXF1C221C C ELECTRO 16V RUS 220MF (8X11.5)

49C903 HCQK221JCA C CHIP CERA 50V CH 220PF J 2012C991 CCXE3D103P C CERA HIKE 2KV 0.01MF PC992 CCXB2H102K C CERA 500V B 1000PF K (TAPPING)C993 CMXM2A10

50D809 DZN4148--- DIODE 1N4148 AUTO 52MMD810 D1NS4----- DIODE 1NS4D811 DZN4148--- DIODE 1N4148 AUTO 52MMD812 DZN4148--- DIODE 1N4148 AUTO 52MMD813 RD-

51Q001 T2SK2676-- FET 2SK2676Q002 TKST2222A- TR CHIP KST2222AQ003 TKSC2688-Y TR KSC2688-YQ101 TKST2222A- TR CHIP KST2222AQ104 TKTA1281Y- TR KTA1281YQ1

52R118 HRFT561JCA R CHIP 1/10 560 OHM J 2012R119 RD-4Z331J- R CARBON FILM 1/4 330 OHM JR121 HRFT822JCA R CHIP 1/10 8.2K OHM J 2012R122 HRFT102JCA R CH

53R502 RD-AZ101J- R CARBON FILM 1/6 100 OHM JR503 RD-AZ101J- R CARBON FILM 1/6 100 OHM JR504 RD-AZ102J- R CARBON FILM 1/6 1K OHM JR505 HRFT392JCA R CH

54R611 RD-2Z474J- R CARBON FILM 1/2 470K OHM JR612 RD-4Z100J- R CARBON FILM 1/4 10 OHM JR613 RS02Z200J- R M-OXIDE FILM 2W 20 OHM J (TAPPING)R614 RX07V

55R858 RD-AZ221J- R CARBON FILM 1/6 220 OHM JR859 HRFT102JCA R CHIP 1/10 1K OHM J 2012R860 HRFT102JCA R CHIP 1/10 1K OHM J 2012R861 RN-AZ7509F R METAL

DAEWOO ELECTRONICS CO., LTD686, AHYEON-DONG MAPO-GUSEOUL, KOREAC.P.O. BOX 8003 SEOUL, KOREATELEX : DWELEC K28177-8CABLE : "DAEWOOELEC"E-mail

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

GENERAL INFORMATION7This color monitor automatically scans all horizontal frequencies from 30KHz to 107KHz, and all verticalfrequencies from 50Hz to 1