LG FLATRON L1810B Service Manual
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LG FLATRON L1810B Service Manual

LG FLATRON L1810B Service Manual

Color monitor
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COLOR MONITOR

SERVICE MANUAL

CHASSIS NO. :
CL-29
FACTORY MODEL:
LB800H
MODEL:
*(
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
E-mail:http://www.LGEservice.com/techsup.html
L1810B(LB800H-UL)
) ID LABEL MODEL No.
Website:http://biz.LGservice.com

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Summary of Contents for LG FLATRON L1810B

  • Page 1: Color Monitor

    COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CL-29 FACTORY MODEL: LB800H MODEL: ) ID LABEL MODEL No. 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 L1810B(LB800H-UL)

  • Page 2: Table Of Contents

    SPECIFICATIONS ... 2 PRECAUTIONS ... 4 TIMING CHART ... 5 OPERATING INSTRUCTIONS ... 6 WIRING DIAGRAM ... 8 BLOCK DIAGRAM ... 9 DESCRIPTION OF BLOCK DIAGRAM...10 1. LCD CHARACTERISTICS Type : TFT SXGA LCD Size : 18inch Pixel Pitch : 0.2805(H) x 0.2805(V) Color Depth : 8-bit, 16,777,216 colors Electrical Interface...

  • Page 3: Signal Connector Pin Assignment

    Signal Connector Pin Assignment • DVI-I Connector (Digital/Analog) Signal (DVI-I) T. M. D. S. Data2- T. M. D. S. Data2+ T. M. D. S. Data2/4 Shield T. M. D. S. Data4- T. M. D. S. Data4+ DDC Clock DDC Data Analog Vertical Sync.

  • Page 4: Precautions

    WARNING FOR THE SAFETY-RELATED COMPONENT. • There are some special components used in LCD monitor that are important for safety. These parts are marked on the schematic diagram and the replacement parts list. It is essential that these critical parts should be replaced with the manufacturer’s specified parts to prevent electric shock, fire or other hazard.

  • Page 5: Timing Chart

    VIDEO SYNC << Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >> Sync Mode Frequency Clock Sort Polarity 31.469 25.175 – 70.8 – 31.468 28.321 70.8 – 31.469 25.175 – 59.94 – 37.5 31.5 –...

  • Page 6: Operating Instructions

    OPERATING INSTRUCTIONS FRONT VIEW Front Control Panel 1. Power ON/OFF Button Use this button to turn the monitor on or off. 2. Power Indicator This indicator lights up green when the monitor operates normally. If the display is in DPM(Energy Saving)mode, this indicator color change to amber.

  • Page 7: Usb Connection

    Making use of USB (Universal Serial Bus)* USB (Universal Serial Bus) is an innovation in connecting your different desktop peripherals conveniently to your computer. By using the USB, you will be able to connect your mouse, keyboard, and other to your monitor instead of having to connect them to your computer.

  • Page 8: Wiring Diagram

    WIRING DIAGRAM Connector Ass’y P/N: MAIN PCB Connector Ass’y P/N: 6631T20015R MATAL FRAME J801 J702 CN_C01 Connector Ass’y P/N: 6631T25008Q P902 J705 J710 CN_C02 CN301 MODULE 6631T11012P - 8 - Connector Ass’y P/N: 6631T20008U...

  • Page 9: Block Diagram

    BLOCK DIAGRAM Module Inverte Power Board - 9 -...

  • Page 10: Description Of Block Diagram

    DESCRIPTION OF BLOCK DIAGRAM 1. Input signal switching part(BA7657). There are two anolog inputs which are D-Sub analog and DVI-anolog input. They come from each 15 pin D-Sub and 29 pin DVI-I connector. 2. Video Controller Part(GM5020). This part amplifies the level of video signal for the anolog to digital conversion and converts from the analog video signal to the digital video signal using a pixelclock.
  • Page 11 50 ~ 60Hz COMPONENTS LINE 100 ~ 240V Operation description_Power 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

    All adjustment are thoroughly checked and corrected when the monitor leaves the factory, but sometimes several minor adjustment may be required. Adjustment should be following procedure and after warming up for a minimum of 10 minutes. • Alignment appliances and tools. - IBM compatible PC - Programmable Signal Generator.

  • Page 13: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK J801 INPUT VOLTAGE (12V) ? CHECK J801 5VST VOLTAGE (5V) ? CHECK U501’s PIN 6. IS THIS PIN OSCILLATED? TROUBLE SOMEWHERE ELSE TROUBLE IN BULT-IN POWER TROUBLE IN BULT-IN POWER TROUBLE IN U501 or X501 - 13 -...
  • Page 14 2. NO RASTER NO RASTER CHECK J702 PIN 1, 2, 3 (12V) ? CHECK J702 PIN 8 (5V) ? CHECK X501 H. PULSE ? CHECK U201(GM5020) ? CHECK L201, L202, L203 PULSE? CHECK U301, U302, U303 PIN 35 MEMORYCLK? TROUBLE IN POWER ADATER or L703, L704 TROUBLE IN...
  • Page 15 CHECK L204 PULSE ? CHECK U401 PIN 10 PULSE ? CHECK U401 PIN 8 V.PULSE? CHECK U401 PIN 7 V.PULSE? TROUBLE IN LCD MODULE - 15 - TROUBLE IN U201 CHECK DOT CLOCK PATTERN CHECK DVS PATTERN CHECK DHS PATTERN...
  • Page 16 3. NO CLOCK (CLOCK GENERATOR) NO DOT CLOCK CHECK X201 24MHz ? CHECK L201 CLOCK ? TROUBLE IN X201 TROUBLE IN U201 - 16 -...
  • Page 17 4. TROUBLE IN DPM TROUBLE IN DPM CHECK R233, R234? CHECK U501 PIN 6 WAVEFORM (24MHz) ? CHECK U501 PIN 11 (0V) ? TROUBLE IN PC CHECK PC PC IS NOT GOING INTO DPM OFF MODE TROUBLE IN X501 TROUBLE IN SIGNAL CABLE - 17 -...

  • Page 18: Printed Circuit Board

    PRINTED CIRCUIT BOARD 1. MAIN BOARD (Component Side) L820 L810 J801 L821 J702 L811 C531 U503 C701 C840 R581 R745 C516 R701 R514 R543 C706 R542 R544 C521 C522 U501 C501 R501 C502 R502 U502 X501 MODEL:LB886F DATE :2002.01.23 P/N :6870T402A13 C831 U803 U820...
  • Page 19 2. MAIN BOARD (Solder Side) L703 L704 D741 D714 D715 D740 R752 D746 D744 D747 D745 R201 C214 C222 C223 C212 C207 R239 R240 D702 D703 D701 D704 D730 D731 - 19 -...
  • Page 20 3. POWER BOARD (Component Side) 4. POWER BOARD (Solder Side) - 20 -...
  • Page 21 5. CONTROL BOARD 6.USB BOARD - 21 -...

  • Page 22: Exploded View

    EXPLODED VIEW - 22 -...

  • Page 23: Exploded View Parts List

    * Note: Safety mark Ref. No. Part No. CABINET ASSEMBLY, LB800H BRAND L039A 3091TKL038A LCD(LIQUID CRYSTAL DISPLAY), LM181E05-C4M1 LG PHILPS TFT COLOR 18.1" SXGA 6304FLP023A or 6304FLP004A LCD(LIQUID CRYSTAL DISPLAY), LM181E05-C3M1 LG PHILPS TFT COLOR 18.1" W/O BACK COVER ASSEMBLY, LB800H L030A 3809TKL025A TILT SWIVEL ASSEMBLY, LB800H .

  • Page 24: Replacement Parts List

    REPLACEMENT PARTS LIST CAUTION: BEFORE REPLACING ANY OF THESE COMPONENTS, READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS MANUAL. * NOTE SAFETY Mark AL ALTERNATIVE PARTS *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION MAIN BOARD CAPACITORS C106 0CC101CK41A 100PF 1608 50V 5% R/TP NP0 C107 0CC101CK41A 100PF 1608 50V 5% R/TP NP0...
  • Page 25 *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C410 0CE107WF6DC 100UF MVK 16V 20% R/TP(SMD) S C411 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y5 C412 0CC102CK41A 1000PF 1608 50V 5% R/TP NP0 C413 0CE107WF6DC 100UF MVK 16V 20% R/TP(SMD) S C501 0CC180CK41A 18PF 1608 50V 5% R/TP NP0...
  • Page 26 *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION U108 0IPH740800H 74F08D 14P,SOIC TP QUAD 2-INP U109 0TFFC80009A FAIRCHILD FDC6326L R/TP SOT-6 U110 0ISS780500H KA78M05-R 3P,D-PAK TP 5V 0.5A U201 0IPRPGN001A GM5020 GENESIS 292P,PBGA TRAY U301 0IEB121616A M12L16161A-7T 50P TSOP ST 16M U302 0IEB121616A M12L16161A-7T 50P TSOP ST 16M...
  • Page 27 *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R519 0RJ4700D677 470 OHM 1/10 W 5% 1608 R/TP R522 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP R523 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP R524 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP R525 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP...
  • Page 28 *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION OTHERs X201 6202TST001E SX-1 SUNNY CHIP 24MHZ 30PPM 2 X501 6202TST001E SX-1 SUNNY CHIP 24MHZ 30PPM 2 POWER BOARD C901 0CBZTBU002B BULK PCX2 335 474K C902 0CKZTBU003B SC E 332M 12.5BW7 250V BK7.5 C903 0CKZTBU003B SC E 332M 12.5BW7 250V BK7.5...
  • Page 29 *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION 6210TCE001P HB-1S2012-121JT CERATECH 2012 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP 0RJ1001D677 1K OHM 1/10 W 5% 1608 R/TP 0RJ1002D677 10K OHM 1/10 W 5% 1608 R/TP 0RJ1501D677 1.5K OHM 1/10 W 5% 1608 R/TP 0RJ1502D677 15K OHM 1/10 W 5% 1608 R/TP 0RJ0222D677...

  • Page 30: Pin Configuration

    GM5020 FUNCTIONAL BLOCK DIAGRAM Serial I/F Host Interface Anolog Triple Image Digital TMDS Caputure/ TMDS Measure. Input ment Video [8-bits] SYSTEM BLOCK DIAGRAM Anolog Composite S-Video PIN CONFIGURATION GENESIS 292P SDRAM/I/F Micro- Frame Store processor Interface YUV to RGB Converter Zoom/ Frame Rate Brightness,...
  • Page 31 DIP Package(p) SOIX Package(J) V CC V SS V SS TSSOP Package(U) V SS PIN CONFIGURATION PIN FUNCTION Pin Name Function A0, A1, A2 Device Adress Inputs Serial Data/Address Serial Clock Write Protect +1.8V to + 6.0V power Supply Ground CAT24WC08J-TE13 8P BLOCK DIAGRAM EXTERNAL LOAD...

  • Page 32: Schematic Diagram

    SCHEMATIC DIAGRAM 1. GM5020 - 32 -...
  • Page 33 2. MEMORY - 33 -...
  • Page 34 3. LVDS - 34 -...
  • Page 35 4. MICOM - 35 -...
  • Page 36 5. DC/DC - 36 -...
  • Page 37 6. CONNECTOR - 37 -...
  • Page 38 7. INPUT SWITCHING - 38 -...
  • Page 39 8. CONTROL KEY - 39 -...
  • Page 40 9.USB - 40 -...
  • Page 41 10. POWER - 41 -...
  • Page 42 Feb. 2002 P/NO : 3828TSL082A Printed in Korea...

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Flatron lb800h-ul

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