LG Flatron W2234S Service Manual
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LG Flatron W2234S Service Manual

Color monitor
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COLOR MONITOR

SERVICE MANUAL

CHASSIS NO. :
MODEL:
(W2234S-SNI/W2234S-BNI.Axx*QP)
xx * means sales region and module type
(AxxIQP: INL 5ms, AxxVQP: AUO 5ms)
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Website:http://biz.LGservice.com
E-mail:http://www.LGEservice.com/techsup.html
W2234S
1
*To apply the MSTAR Chip.

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Summary of Contents for LG Flatron W2234S

  • Page 1: Color Monitor

    Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : MODEL: W2234S (W2234S-SNI/W2234S-BNI.Axx*QP) xx * means sales region and module type (AxxIQP: INL 5ms, AxxVQP: AUO 5ms) CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. *To apply the MSTAR Chip.

  • Page 2: Table Of Contents

    CONTENTS SPECIFICATIONS ........... 2 SERVICE OSD ............14 PRECAUTIONS ............3 TROUBLESHOOTING GUIDE ......15 TIMING CHART ............7 WIRING DIAGRAM ..........22 DISASSEMBLY............8 EXPLODED VIEW ............23 BLOCK DIAGRAM............10 REPLACEMENT PARTS LIST ......... 24 DISCRIPTION OF BLOCK DIAGRAM ....10 ADJUSTMENT ............

  • Page 3: Precautions

    PRECAUTION WARNING WARNING FOR THE SAFETY-RELATED COMPONENT. BE CAREFUL ELECTRIC SHOCK ! • There are some special components used in LCD • If you want to replace with the new backlight (CCFL) monitor that are important for safety. These parts are or inverter circuit, must disconnect the AC marked on the schematic diagram and...

  • Page 4: Servicing Precautions

    SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this 9. Use with this receiver only the test fixtures specified in service manual and its supplements and addenda, read this service manual. and follow the SAFETY PRECAUTIONS on page 3 of this CAUTION: Do not connect the test fixture ground strap publication.
  • Page 5 General Soldering Guidelines Replacement 1. Carefully insert the replacement IC in the circuit board. 1. Use a grounded-tip, low-wattage soldering iron and 2. Carefully bend each IC lead against the circuit foil pad appropriate tip size and shape that will maintain tip and solder it.
  • Page 6 Circuit Board Foil Repair At Other Connections Excessive heat applied to the copper foil of any printed Use the following technique to repair the defective copper circuit board will weaken the adhesive that bonds the foil to pattern at connections other than IC Pins. This technique the circuit board causing the foil to separate from or involves the installation of a jumper wire on the component side of the circuit board.

  • Page 7: Timing Chart

    TIMING CHART VIDEO SYNC Total Front Back Frequency Display Sync. CLOCK Distingishment Polority period Porch Porch Resolution [kHz]/ [Hz] [MHz] H(Pixels) 31.468 28.321 720 X 400 V(Lines) 70.09 H(Pixels) 31.469 25.175 640 x 480 V(Lines) 59.94 H(Pixels) 37.5 31.5 640 x 480 V(Lines) H(Pixels) 37.879...

  • Page 8: Disassembly

    DISASSEMBLY 1. Lay the front on the side of soft Remove the back cover. cushion 2. Remove the base Unscrew the screws as showing Unstick the foil Remove the front cover Pull out the LVDS cable...
  • Page 9 DISASSEMBLY Unstick the foil with the lamp wire Remove the keypad Unstick the foil with the lamp wire Remove the chassis Pull out the lamp wire...

  • Page 10: Block Diagram

    BLOCK DIAGRAM DESCRIPTION OF BLOCK DIAGRAM 1. Video Controller Part. This part amplifies the level of video signal for the digital conversion and converts from the analog video signal to the digital video signal using a pixel clock. The pixel clock for each mode is generated by the PLL. The range of the pixel clock is from 25MHz to 146MHz.

  • Page 11: Lips Board Block Diagram

    LIPS Board Block Diagram 50-60HZ Operation Description_ LIPS 1. EMI components. This part contains of EMI components to comply with global marketing EMI standards like FCC, VCCI CISPR, the circuit included a line-filter, across line capacitor and of course the primary protection fuse. 2.

  • Page 12: Adjustment

    ADJUSTMENT 1. Software a. port95nt.exe b. Edid.exe c. Writing data: Mars W2234 2. Hardware a. PC（winXP, win2000 or win98）1 pc； b. Writing tools（Including EDID writing card、connecting cable etc.） 3. EDID Writing Connection Figure 1 Figure 2 Figure 3 4. EDID Writing SOP: a.
  • Page 13 b. Select “Model” of main menu. Password: 1234 c. Select written model W2234S d. Input product serial number (The SN is 12 numbers) in “S/N”Column, then the program auto writing start.

  • Page 14: Service Osd

    Auto Color : W/B balance and Automatically sets the gain and offset value. c) AGING : Select Aging mode(on/off). d) MODULE : Show Current module Type e) LG LOGO: ON OFF. (Yes or No to display the Splash OSD in AC/DC power On time.) f) DFC: ON OFF.

  • Page 15: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. No Power & Power LED Off No Power Check power Check I/F BD 5V output Check 5V/16V Check output if short D805/D804/C or not 820/C817 Check primary Check rectifier D801/RT801 voltage C804 /F801 Check pin7 Check IC801 of IC802 /IC803 Check...
  • Page 16 2. Backlight can’t be turned on No Backlight Check power Is there 16V supply on pin9 of IC501 Check I/F BD Check pin8 of R510/R511/C507 IC501, is there Check CheckIC501/R50 Pin11&Pin14 of 4/C503/C511 IC501, it have output or not Check U501/U502/Q506 /Q501/Q505/T50 1/T502...
  • Page 17 3. DC output voltage is unstable Output Voltage Unstable Check Check IC803 R825/R822/ R Pin R823/R824 Check Replace NG IC801/R832/ component C821/R821 Check IC801/T801...
  • Page 18 4. Backlight turn on and turn off soon Ba cklight turn on but turn off Reinsert W orkmanship lamp wires Replace panel Panel NG Check Pin7 of Check I/F BD IC it have R509/C506 signal or not Check Pin2 of Check IC501, is it 1.3V D505/D506/...
  • Page 19 5. Black Screen and backlight turn on Black Screen Check power supply: Power Fail Pin1, 2 of CN101 Check D101 Check pin4,6 , and 51 And U101 Of U105 Check Check pin30,and 53 U102 Of U105 Check Reset (pin54) Check C164, R153 Of U105 Check: X101, Check Crystal: Pin1,...
  • Page 20 6. White Screen White Screen LVDS Cable Workmanship Reinsert Change LVDS LVDS Cable NG Cable Check VLCD Check LVDS Panel Fail Is 5V? Signals Check Panel - Enable Check the HW Reset Check C164 Of U105 (pin28) is High? Of U105 pin54 R153 Check R109, R110,R107,Q101,...
  • Page 21 7. BAD SCREEN Bad Screen LVDS Cable Workmanship Reinsert Change LVDS Cable NG LVDS Cable Check crystal Check X01, Pin1&Pin2 of C157, C158 U105 Check Check R102, R103, Pin5&Pin6 of R105, R106, Q103 CN101 Check Pin28& Pin56 of U105...

  • Page 22: Wiring Diagram

    WIRING DIAGRAM...

  • Page 23: Exploded View

    Exploded View and Parts List...

  • Page 24: Replacement Parts List

    COV30039901 430300801910R HRN ASSY 2x4P to 8P 280mm UL1571#28 MFZ55249301 506060009800R CUSHION,EPS-Left, LE22E2 MFZ55249302 506060009810R CUSHION,EPS-Right, LE22E2 MAY42295507 506020023602R CARTON LG US/CANADA L2234S(LE22E2) MAY42295506 506020023600R CARTON LG WW W2234S(LE22E2) MAY42295508 506020023601R CARTON LG CHINA W2234S(LE22E2) IF BOARD 1. FOR INL...
  • Page 25 X101, 432008010270R XTAL 14.31818MHz HC-49US DIP 16pF 30PPM CN102, 440819015030R CON D-SUB FEM.15P RA W/O SCREW DZ11AA1-H Q101, 410500068290R XSTR AP2305GN P-CH SOT23(APEC) RoHS 410060018380R XSTR AM2321P-T1-PF P-CH SOT23(ANALOG POW 410500075270R XSTR AO3415 P-CH,SOT23(AOS) RoHS Q103,Q104, 410500045210R XSTR PMBT3904 NPN 200MA,40V SOT23(PHILIP 410500045140R XSTR MMBT3904LT1G NPN 200MA 40V SOT23(ON 410500045090R XSTR MMBT3904 NPN SOT-23(PANJIT)RoHS 410500045130R XSTR MMBT3904 NPN SOT-23(INFIN EON)RoHS...
  • Page 26 R172, 414918047150R RES SMD (0402) 470Ω J,RT,RoHS R105,R110, 414918047250R RES SMD (0402) 4.7KΩ J,RT,RoHS R127,R128, R108, 414918047350R RES SMD (0402) 47KΩ J,RT,RoHS R117,R118,R119, 414918750910R RES SMD (0402) 75Ω F,RT,RoHS R122,R123,R124, 414918845910R RES SMD (0402) 84.5Ω F,RT,RoHS R168, 414916068150R RES SMD (0603) 680Ω J,RT RoHS REV:A C104,C106,C108, C110,C113,C114, C115,C119,C120,...
  • Page 27 791501340600R PCBA,I/F BOARD,SMT,LE22E2-610 ROHS 511130001200R SOLDER BAR,Sn96.5/Ag3.0/Cu0.5/Ni0.06/Ge0 420431010460R CAP EC 100uF 16V M,105℃ ST 5x11,RoHS C109,C102, 420432200460R CAP EC 22uF 16V M,105℃ ST, 5x11,RoHS C103,C136,C138, CN101, 430631060020R WAFER 2.0mm 6P 180°,RoHS CN104, 430631080130R WAFER 2x4P 2.0mm,200PHD-2*4ST RoHS X101, 432008010270R XTAL 14.31818MHz HC-49US DIP 16pF 30PPM CN102, 440819015030R CON D-SUB FEM.15P RA W/O SCREW DZ11AA1-H Q101,...
  • Page 28 R102,R103,R140, R142,R143,R144, R147,R148,R166, 414918010350R RES SMD (0402) 10KΩ J,RT,RoHS R177,R190,R192, R106,R129,R169, R176, R107,R109,R153, 414918010450R RES SMD (0402)100KΩ J,RT,RoHS R135,R136, 414918022250R RES SMD (0402) 2.2KΩ J,RT,RoHS R165, 414916033150R RES SMD (0603) 330Ω J,RT RoHS R125, 414918039150R RES SMD (0402) 390Ω J,RT,RoHS R114,R115,R116, 414918470910R RES SMD (0402) 47Ω...

  • Page 29: Power Board

    R137, 414918033150R RES SMD (0402) 330Ω J,RT,RoHS R138, 414918033050R RES SMD (0402) 33Ω J,RT,RoHS 511130002200R SOLDER PASTE,Sn96.5-Ag3.0-Cu0.5 ROHS 0.385 511130002201R SOLDER PASTE,Sn96.5%Ag3.0%Cu0.5% 511130002202R SOLDER PASTE,Sn95.5%Ag3.9%Cu0.6% Power Board FOR INL&AUO ITEM Location Description Usage Un 791501400600R PCBA,P/I BOARD,W/O SPK,LE22E2-610 ROHS D801, 411050005021R DIO BRDG BL4-06-G-BF52-LF 600V/4A(FEC)Ro 411050006041R DIO BRDG KBL06M 600V/4A(MOSPEC RoHS 411050007010R DIO BRDG KBL405G 600V/4A(TSC) RoHS...
  • Page 30 411090011040R SCHTKY SRF1060C 60V/10A ITO220 (MOSPEC)R 411090011090R SCHTKY SB1060FCT 60V/10A ITO 220AB(PANJI 507200003800R HEATSINK,56x20xt10mm LE1904/05 509112306100R SCREW,P,CROSS,T.T-3*6,ZnROHS Q804, 410050102290R XSTR AP2763I-A N-CH TO-220CFM (APEC) RoH 410050057280R XSTR STP8NK80ZFP N-CH TO220FP (ST) 410050101050R 2SK3264-01MR N-CH TO-220F15 (FUJI) RoHS 507200003700R HEATSINK,46x20xt10mm LE1704/05 509112306100R SCREW,P,CROSS,T.T-3*6,ZnROHS Q501,Q503, 410500045210R XSTR PMBT3904 NPN 200MA,40V SOT23(PHILIP...
  • Page 31 R504,R519,R525, 414916010550R RES SMD (0603) 1MΩ J,RT RoHS REV:A R823,R819, 414908100310R RES SMD (0805) 100KΩ F,RT,RoHS R506, 414916150310R RES SMD (0603) 150KΩ F,RT RoHS R806,R807,R808, 414904082350R RES SMD (1206) 82KΩ J,RT RoHS R822, 414908154210R RES SMD (0805) 15.4KΩ F,RT RoHS R830, 414908020150R RES SMD (0805) 200Ω...
  • Page 32 R545,R546, 1280 414916047150R RES SMD (0603) 470Ω J,RT RoHS REV:A R547,R548, 1290 511110001104R SEAL-GLUE,3611,(EURO) 0.023 1300 511110001100R SEAL-GLUE,NE8800K,(FUJI) 1310 511110001101R SEAL-GLUE,3629,(LOCTITE) 1320 511110000700R HERAEUS SMT-ADHESIVE,PD955PY(TAMURA) 1330 D802, 411020055330R DIO MUR1100ERL AXIAL LEAD(ON) RoHS 1340 411032006020R DIO FR10-10-LF 1000V/1A AT(FRO NTIER)RoH 1350 411020053090R DIO PS1010R 1000V/1A DO-41(PAN JIT)RoHS 1360...

  • Page 33: Schematic Diagram

    SCHEMATIC DIAGRAM 1. DC to DC...
  • Page 34 2. Input...
  • Page 35 3. Scaler_TSUMU18ER...
  • Page 36 4. Keypad...
  • Page 37 5. Inverter...

  • Page 38: Power Schematic Diagram

    6. Power...
  • Page 39 . 2008 P/NO: Printed in Korea...

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