LG Flatron L222WS Service Manual
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LG Flatron L222WS Service Manual

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COLOR MONITOR
SERVICE MANUAL
MODEL:
(L222WS-SNQ/BNQ.AxxAQP.
xx:sales marketing, Mstar scaler, CPT Module)
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
E-mail:http://www.LGservice.com/techsup.html
L222WS
*To apply the MSTAR Chip.

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Summary of Contents for LG Flatron L222WS

  • Page 1 E-mail:http://www.LGservice.com/techsup.html COLOR MONITOR SERVICE MANUAL MODEL: L222WS (L222WS-SNQ/BNQ.AxxAQP. xx:sales marketing, Mstar scaler, CPT Module) 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 ............16 PRECAUTIONS ............3 TROUBLESHOOTING GUIDE ......17 TIMING CHART ............7 WIRING DIAGRAM ..........23 DISASSEMBLY ............8 EXPLODED VIEW...........24 BLOCK DIAGRAM...........11 REPLACEMENT PARTS LIST .......26 DISCRIPTION OF BLOCK DIAGRAM ....13 ADJUSTMENT ............15 SCHEMATIC DIAGRAM ......... 35 SPECIFICATIONS 1.

  • Page 3: Precautions

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

  • 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. Use a grounded-tip, low-wattage soldering iron and 1. Carefully insert the replacement IC in the circuit board. appropriate tip size and shape that will maintain tip 2. Carefully bend each IC lead against the circuit foil pad 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 pattern at connections other than IC Pins. This technique to the circuit board causing the foil to separate from or involves the installation of a jumper wire on the "lift-off"...

  • Page 7: Timing Chart

    TIMING CHART Video Total Sync Front Blanking Sync Active MODE H / V Frequency Period Duration Porch Time Resolution Polarity Clock Time ( E ) ( D ) ( C ) ( B ) ( A ) H(Pixels) 31.468 28.321 V(Lines) 70.08 720 X 400...

  • Page 8: Disassembly

    DISASSEMBLY-Set Put the monitor on a soft flat. Remove the four screws and disassemble the stand. Disassemble the rear cover from the bezel with Disassemble the connector. a thin card. There are 7 clips on the button & top and 5 clips on the left/right side. Disassemble the bezel.
  • Page 9 Remove the 2 screws. Disassemble the LVDS cable. Main board & power board The panel...
  • Page 10 DISASSEMBLY-Stand Pull the Base 2 ea Latches to inside until losing elasticity. Synchronously, take one finger to push the base. Consequently, pull the stand body directly. Separate Stand Body & Stand Base. Fix Stand Base & Stand Body. -10-...

  • Page 11: Block Diagram

    BLOCK DIAGRAM -11-...
  • Page 12 BLOCK DIAGRAM-POWER Power 100~240V EMI filter Rush Diode Rectification Transformer prevention rectifier Starting resistor Switching Feedback 5V/12V circuit (PWM OVP protect control output OVP control IC & circuit circuit MOSFER) Inverter LC resonance Transformer Push-pull conversion circuit 4 CCFL lamps OVP circuit VDDA ON/OFF...

  • Page 13: Description Of 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 135MHz.

  • Page 14: Lips Board Block Diagram

    LIPS Board Block Diagram 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 15: Adjustment

    ADJUSTMENT Windows EDID V1.0 User Manual 2. EDID Read & Write 1) Run WinEDID.exe Operating System: MS Windows 98, 2000, XP Port Setup: Windows 98 => Doesn’t need setup Windows 2000, XP => Need to Port Setup. This program is available for LCD Monitor only. 1.

  • Page 16: Service Osd

    SERVICE MODE 1) Turn off the power switch at the front side of the display. 2) Wait for about 5 seconds and press MENU, POWER switch with 1 second interval. 3) The SVC OSD menu contains additional menus that the User OSD menu as described below. a) CLEAR ETI: To initialize using time.

  • Page 17: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. NO POWER No Power (Power Indicator Off) Check the Adapter/Inverter Please reinsert and section make sure the AC of 100-240 is normal Measure U702 Check CN401 or replace PIN2=1.8V U701 U702, U701 PIN2=3.3V Check X201 oscillate Replace X201 waveforms are normal Replace U401 -17-...
  • Page 18 2. NO RASTER (OSD IS NOT DISPLAY)-LIPS No Raster (OSD Is Not Displayed) Check power board and find out a Check U701 short point as penning each power PIN 3 =5V? line Check U701 Check U701 Check C408 PIN 2 =3.3V? 1.
  • Page 19 2. NO RASTER (OSD IS NOT DISPLAY)-MSTAR No Raster (OSD Is Not Displayed) SCALER PIN96 1. Check C221 C222 97 OSCILLATES 2. Check X401 AS 14.318MHZ? 3. TROUBLE IN SCALER IC CHECK CONNECTION SCALER IC LINE FROM D-SUB TO PIN27 H SYNC ? SCALER PIN28 V SYNC? TROUBLE IN CABLE OR...
  • Page 20 4. TROUBLE IN DPM TROUBLE IN DPM SCALER IC PIN27 H SYNC? CHECK H/V SYNC LINE PIN28 V SYNC? TROUBLE IN CABLE OR LCD MODULE -20-...
  • Page 21 5. POWER No Power (Power Indicator Off) Check AC line volt Check AC line 100V or 220V Check F901, BD901 Check the voltage of C905(+) Check voltage of Check R909, D902, C901 pin7 C907,C908,IC901 Check the output of Check D901,L905,Q903,R914 IC901 pin6 1) Check IC901,T901 2) Check D906, D907, ZD901, ZD902, ZD903...
  • Page 22 6. RASTER NO Raster (Lamp Off) Check C811 (+) Check power section =12V Check Interface section or Check ON/OFF main board signal Check Q801 Q802 Q803 CheckIC801 pin ZD801 2=5V? Check IC801 Check IC801 pin 5/pin6 Pin1/pin15 have the output of sawtooth wave at short time Replace IC801 Cut all the pin connector of...

  • Page 23: Wiring Diagram

    WIRING DIAGRAM 089G179E30H 20 095G 825 7D502 095G8014 6D 46 -23-...

  • Page 24: Exploded View

    EXPLODED VIEW -24-...
  • Page 25 EXPLODED VIEW PARTS LIST Ref. No. TPV part no. LGE part no. Description A34G0462ABNA1B0130 ACQ35565301 Bezel (Front cabinet) Silver color A34G0462 B6A1B0130 ACQ35565302 Bezel (Front cabinet) Black color 750GLCB6WA112M000K EBU41363801 CPT PANEL CLAA220WA01 PWPC7C42CQA1 EBU41368101 CPT POWER BOARD(L222WS LIPS) MAIN METAL FRAME FOR L222WS A15G0259102 ADV35565701 KEY BOARD HARNESS(Main to...

  • Page 26: Replacement Parts List

    REPLACEMENT PARTS LIST DATE: 2007. 07. 30 LOC. NO. PART NO. DESCRIPTION MAIN BOARD CAPACITORS C220 067G305V100 3 10UF +-20% 16V C202 067G305V100 3 10UF +-20% 16V C303 067G305V101 3 100UF M 16V C402 067G305V101 3 100UF M 16V C407 067G405V101 3P CAP 105℃...
  • Page 27 C211 065G0402104 15 MLCC 0402 0.1UF K 16V X5R C212 065G0402104 15 MLCC 0402 0.1UF K 16V X5R C213 065G0402104 15 MLCC 0402 0.1UF K 16V X5R C214 065G0402104 15 MLCC 0402 0.1UF K 16V X5R C215 065G0402104 15 MLCC 0402 0.1UF K 16V X5R C222 065G0402220 31 CHIP 22PF 50V NPO...
  • Page 28 RESISTORs R402 061G152M479 64 RST MOFR 4.7 OHM +-5% 2WS R201 061G0402000 RST CHIPR 0 OHM +-5% 1/16W R101 061G0402000 RST CHIPR 0 OHM +-5% 1/16W R225 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R224 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R222 061G0402101 RST CHIPR 100 OHM +-5% 1/16W...
  • Page 29 R204 061G0402390 0F RST CHIP 390R 1/16W 1% R228 061G0402392 RST CHIP 3.9K 1/16W 5% R229 061G0402392 RST CHIP 3.9K 1/16W 5% R109 061G0402471 RST CHIPR 470 OHM +-5% 1/16W R404 061G0402472 RST CHIPR 4.7 KOHM +-5% 1/16W R303 061G0402472 RST CHIPR 4.7 KOHM +-5% 1/16W R218 061G0402472...
  • Page 30 C926 065G306M3322BP 3300PF 20% C905 067G 31510115K EC 105℃ 100UF M 450V KINGNICHI C923 067G215V1023HS CAP L105℃ 1000UF M 16V C922 067G215V471 3H CAP L105℃ 470UF M 16V C921 067G215V471 4H CAP 105℃ 470UF M 25V C815 067G215V471 4H CAP 105℃ 470UF M 25V C811 067G215V471 4H CAP 105℃...
  • Page 31 C931 065G 2K152 1T GP CERAMIC CAP C930 065G 2K152 1T GP CERAMIC CAP C914 065G 2K152 1T GP CERAMIC CAP C912 065G 2K152 1T GP CERAMIC CAP C907 067G 5152207HT CAP 105℃ 22UF M 50V C925 067G215S10915T3964 EC CAP 1.0uF 450V 8*11mm DIODEs BD901 093G 50460900...
  • Page 32 IC901 056G 379 79 IC LD7522PS SOP-8 IC801 056G 608 10 IC OZ9938GN-B SOIC-16 IC903 056G 158 7 AP431V TO-92BY ATC RESISTORs R905 061G152M10452T RST MOFR 100KOHM +-5% 2WS R914 061G152M43852T RST MOF 0R47 5% 2W R822 065G 3J3096ET 3PF,J,3KV,Z5P R832 065G 3J3096ET 3PF,J,3KV,Z5P...
  • Page 33 R814 061G0805754 RST CHIPR 750 KOHM +-5% 1/8W JR802 061G1206000 RST CHIPR 0 OHM +-5% 1/4W JR902 061G1206000 RST CHIPR 0 OHM +-5% 1/4W JR824 061G1206000 RST CHIPR 0 OHM +-5% 1/4W JR823 061G1206000 RST CHIPR 0 OHM +-5% 1/4W JR822 061G1206000 RST CHIPR 0 OHM +-5% 1/4W...
  • Page 34 073G 253 91 LS CHOKE BY LI SHIN L903 073G 253 91 LS CHOKE BY LI SHIN L902 073L 174 40 HG GBQM4.778.391 L901 073L 174 53 LG GP CHOKE L902 006G 31502 1.5MM RIVET L901 006G 31502 1.5MM RIVET L905...

  • Page 35: Schematic Diagram

    SCHEMATIC DIAGRAM 1. SCALER R101 0R05 1/16W R102 100R 1/16W DSUB_H R103 100R 1/16W FB102 DSUB_V R105 R106 VGA_B+ R104 100R 1/16W C101 DSUB_B+ ZD101 ZD102 C102 C103 BEAD 0.047uF 22pF 22pF R107 C104 RLZ5.6B RLZ5.6B 5pF/50V VGA_B- R108 100R 1/16W C105 DSUB_B- CN101...
  • Page 36 VDVI VMPLL VPLL AVDD VDDP VDDC VDDP VCC3.3 VCC3.3 FB203 AVDD VCC3.3 FB204 VPLL VCC3.3 300OHM 300OHM C203 C204 C206 C208 VCTRL C202 10uF/16V 0.1uF/16V C205 C207 0.1uF/16V LVA3P 0.1uF/16V 0.1uF/16V DSUB_R+ RIN0P LVA3M 0.1uF/16V 0.1uF/16V DSUB_R- RIN0M LVACKP DSUB_G+ GIN0P LVACKM DSUB_G-...
  • Page 37 PANEL_VCC CN301 PA[0..9] PA[0..9] LVA3P LVA3M LVACKP LVACKM LVA2P C302 LVA2M 0.1uF/16V LVA1P LVA1M R302 LVA3P LVA0P 470R 1/8W LVA3M LVACKP LVA0M LVACKM LVA2P LVA2M LVA1P PB[0..9] LVA1M PB[0..9] LVB3P LVB3M LVA0P LVBCKP LVA0M LVBCKM LVB3P LVB3M LVB2P LVBCKP LVB2M LVBCKM LVB1P LVB1M...
  • Page 38 CN401 VCC1.8 MVCC U702 CMVCC R402 4.7 OHM 2W CMVCC CMVCC C411 BKLT-VBRI BKLT-EN 0.1uF/16V C410 C402 100uF/16V C_PANEL_INDEX PANEL_ID# Volume# 0.1uF/16V Volume# Mute Mute CONN C405 0.1uF/16V MVCC FB402 DGND 1,2,3 CMVCC VCC3.3 U701 VOUT C407 C409 AP1117E33LA C401 C408 100uF16V VCC3.3...
  • Page 39 2. INVERTER PT801 POWER X'FMR 80GL22T 1 DN CN801 OPT1 C825 33G8021 2E AC 10pF/3KV R836 +12V 65G 3J1006ET 1KΩ 1/8W BEAD JUMPER 61G0805102 JP934 JP909 R805 C828 R802 470 1/4W 0.1uF 61G1206471 65G0805104 32 300KΩ 1/8W 61G0805304 R804 C811 470uF/25V 10KΩ...
  • Page 40 0.0022uF/250V D904 100Ω 1/4W R928 1N4148W R931 L901 3.3MΩ 1/4W 93G 6432S C900 100Ω 1/4W IC901 R916 73L 174 53 LG GP LD7522 R910 61G1206101 100Ω 1/4W 56G 379 79 10Ω 1/4W Q903 STP10NK70ZFP Line R912 57G 667516 C903 ZD904...
  • Page 41 Jul. 2007 P/NO : Printed in China...

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