LG FLATRON L1800PM Service Manual
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LG FLATRON L1800PM Service Manual

LG FLATRON L1800PM Service Manual

Color monitor (lb886f-sl)
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COLOR MONITOR

SERVICE MANUAL

CHASSIS NO. :
CL-29
FACTORY MODEL:
LB886F
MODEL:
*(
) ID LABEL MODEL No.
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
SOURCE
MENU
AUTO/SET
VOLUME
Website:http://biz.LGservice.com
E-mail:http://www.LGEservice.com/techsup.html
L1800PM
(LB886F-SL)

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Summary of Contents for LG FLATRON L1800PM

  • Page 1: Color Monitor

    Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CL-29 FACTORY MODEL: LB886F MODEL: L1800PM (LB886F-SL) ) ID LABEL MODEL No. CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. SOURCE MENU AUTO/SET VOLUME...

  • Page 2: Table Of Contents

    CONTENTS SPECIFICATIONS ........... 2 ADJUSTMENT ............13 PRECAUTIONS ............3 TROUBLESHOOTING GUIDE ......14 TIMING CHART ............4 PRINTED CIRCUIT BOARD........21 OPERATING INSTRUCTIONS ........ 5 EXPLODED VIEW...........26 WIRING DIAGRAM ..........9 REPLACEMENT PARTS LIST .......28 BLOCK DIAGRAM ..........10 PIN CONFIGURATION..........34 DESCRIPTION OF BLOCK DIAGRAM....11 SCHEMATIC DIAGRAM .........

  • Page 3: Precautions

    PRECAUTION WARNING FOR THE SAFETY-RELATED COMPONENT. WARNING 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: Timing Chart

    TIMING CHART VIDEO SYNC << Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >> Back Porch Total Period Video Active Time Front Porch Sync Duration Sync Mode Resolution Frequency Clock Polarity Sort 31.469 640x350 25.175 70Hz...

  • Page 5: Operating Instructions

    OPERATING INSTRUCTIONS FRONT VIEW SOURCE MENU AUTO/SET VOLUME Front Control Panel REAR VIEW Power ON/OFF Switch Power Connect AUDIO DC OUT Stand Lock D-sub Siganl Port DVI Port Stand Cover AUDIO DC IN AUDIO IN USB Port - 5 -...

  • Page 6: Front Control Panel

    Front Control Panel Button AUTO/SET Power Button SOURCE Button MENU Button Button SOURCE MENU AUTO/SET VOLUME Headphone jack Volume Button Power Button Power Indicator Control Function Use this button to make Dsub or DVI connector active. This SOURCE Button feature is used when two computers are connected to the monitor.
  • Page 7 Control Function Press the hold the MENU button and button for 3 seconds: MENU, Button the message “CONTROLS LOCKED” appears. C ONT ROLS LOC KED You can unlock the OSD controls at any time by pushing the MENU, button for 3 seconds: the message “CONTROLS UNLOCKED”...

  • Page 8: 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 peripher to your monitor instead of having to connect them to your computer.

  • Page 9: Wiring Diagram

    WIRING DIAGRAM 6631T25005D Connector Ass’y P/N: REAR SHIELD MAIN PCB P903 MATAL FRAME P902 J705 METAL FRAME J801 J702 J710 CN_C02 CN_C01 CN301 MODULE Speaker PCB 6631T11012P Connector Ass’y P/N: - 9 -...

  • Page 10: Block Diagram

    BLOCK DIAGRAM Power Board - 10 -...

  • Page 11: 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 12 50 ~ 60Hz 100KHz HVDC INPUT RECTIFIER ENERGY OUTPUT RECTIFIER COMPONENTS AND FILTER TRANSFER AND FILTER LINE 100 ~ 240V PWM CONTROL PHOTO-COUPLER SIGNAL CIRCUIT ISOLATION COLLENTION SECONDA RY PRIMARY 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.

  • Page 13: Adjustment

    ADJUSTMENT All adjustment are thoroughly checked and corrected 3. Adjustment for White Balance when the monitor leaves the factory, but sometimes 1) Display color 0,0 pattern at Mode 15. several minor adjustment may be required. 2) Set External Bright to MAX position and Contrast to Adjustment should be following procedure and after MAX Position.

  • Page 14: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK J801 TROUBLE IN INPUT VOLTAGE BULT-IN POWER (12V) ? CHECK J801 TROUBLE IN 5VST VOLTAGE BULT-IN POWER (5V) ? CHECK U501’s PIN 6. TROUBLE IN IS THIS PIN U501 or X501 OSCILLATED? TROUBLE SOMEWHERE ELSE...
  • Page 15 2. NO RASTER NO RASTER CHECK TROUBLE IN J702 PIN 1, 2, 3 POWER ADATER (12V) ? or L703, L704 CHECK TROUBLE IN J702 PIN 8 (5V) ? INVON PATTERN CHECK TROUBLE IN X501 X501 H. PULSE ? CHECK TROUBLE IN U201(GM5020) ? U201 CHECK...
  • Page 16 CHECK TROUBLE IN L204 U201 PULSE ? CHECK CHECK DOT CLOCK U401 PIN 10 PATTERN PULSE ? CHECK CHECK U401 PIN 8 V.PULSE? DVS PATTERN CHECK CHECK U401 PIN 7 DHS PATTERN V.PULSE? TROUBLE IN LCD MODULE - 16 -...
  • Page 17 3. NO CLOCK (CLOCK GENERATOR) NO DOT CLOCK CHECK TROUBLE IN X201 24MHz ? X201 CHECK TROUBLE IN L201 U201 CLOCK ? - 17 -...
  • Page 18 4. TROUBLE IN DPM TROUBLE IN DPM CHECK PC CHECK PC IS NOT GOING R233, R234? INTO DPM OFF MODE CHECK U501 PIN 6 TROUBLE IN WAVEFORM X501 (24MHz) ? CHECK TROUBLE IN U501 PIN 11 SIGNAL CABLE (0V) ? TROUBLE IN PC - 18 -...
  • Page 19 5. AUDIO NO POWER POWER INDICATOR OFF CHECK TROUBLE BUILT 12V DC? IN POWER CHECK TROUBLE IN CHECK U5 OUTPUT R1, R2 R1, R2? (5V) ? TROUBLE IN U5 CHECK U7 PIN 1 TROUBLE IN U7 OUTPUT ? TROUBLE IN U3 - 19 -...
  • Page 20 6. NO VOLUME CONTROL CHECK TROUBLE IN U5 U2 PIN 8 (5V)? CHECK U2 PIN 5 OUTPUT TROUBLE IN U2 (FROM 0V TO 3.6V)? TROUBLE IN U3 7. AUDIO NO OUTPUT CHECK TROUBLE CHECK U3 PIN 4, 9 IN U3 J4 AND PC? AUDIO IN? CHECK...

  • Page 21: Printed Circuit Board

    PRINTED CIRCUIT BOARD 1. MAIN BOARD (Component Side) L820 L810 J705 J801 U802 L821 C817 J702 C845 C850 L811 R809 C531 C844 R810 U503 C701 C526 C409 C840 R581 R745 C834 C516 U821 R406 U401 R701 R514 R543 L402 C706 R542 R544 C410...
  • Page 22 2. MAIN BOARD (Solder Side) L703 L704 R201 C214 C222 C223 C212 C207 R239 R240 U702 U701 D701 D704 D714 D713 D715 D730 D731 C742 R728 - 22 -...
  • Page 23 3. POWER BOARD (Component Side) 4. POWER BOARD (Solder Side) - 23 -...
  • Page 24 5. CONTROL BOARD 6.USB BOARD - 24 -...
  • Page 25 7. SPEAKER BOARD (Component Side) LED1 8. SPEAKER BOARD (Solder Side) - 25 -...
  • Page 26 - 26 -...

  • Page 27: Exploded View Parts List

    * Note: Safety mark Description Ref. No. Part No. CABINET ASSEMBLY, LB886F BRAND - SPK 3091TKL032C LCD(LIQUID CRYSTAL DISPLAY), "LM181E05-C4M1 LG PHILPS TFT COLOR 18.1" SXGA 6304FLP023A BACK COVER ASSEMBLY, LB886F . EQ22 COLOR 3809TKL022D TILT SWIVEL ASSEMBLY , LB886F, HIPS-60HR 3043TKK086B...

  • Page 28: 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 DATE: 2002. 02. 18. DATE: 2002. 02. 18. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC.
  • Page 29 DATE: 2002. 02. 18. DATE: 2002. 02. 18. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C410 0CE107WF6DC 100UF MVK 16V 20% R/TP(SMD) C842 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C411 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y...
  • Page 30 DATE: 2002. 02. 18. DATE: 2002. 02. 18. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION U502 0IKE704200J KIA7042AF SOT-89 TP 4.2V VOL R150 0RJ0222D677 22 OHM 1/10 W 5% 1608 R/TP U503 0ICS240813B CAT24WC08J-TE13 8P,SOIC R/TP...
  • Page 31 DATE: 2002. 02. 18. DATE: 2002. 02. 18. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R529 0RJ1002D677 10K OHM 1/10 W 5% 1608 R/TP R807 0RH0000D622 0 1/10W P-TYPE TAPPING R531 0RJ3302D677 33K OHM 1/10 W 5% 1608 R/TP...
  • Page 32 DATE: 2002. 02. 18. DATE: 2002. 02. 18. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION SOUND BOARD C903 0CKZTBU003B SC E 332M 12.5BW7 250V BK7.5 C904 0CBZTBU002C BULK PCX2 335 104M 0CE108EF618 1000UF KMG 16V M FL TP 5 C905...
  • Page 33 DATE: 2002. 02. 18. DATE: 2002. 02. 18. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION 0RJ0471D677 4.7 OHM 1/10 W 5% 1608 R/TP 0CH8107F611 100UF 16V M 85STD(CYL) R/TP 0RJ3002D677 30000 OHM 1/10 W 5% 1608 R/T 0CC470CK41A...

  • Page 34: Pin Configuration

    PIN CONFIGURATION GM5020 GENESIS 292P FUNCTIONAL BLOCK DIAGRAM Serial I/F SDRAM/I/F Host Micro- Frame Store Interface processor Interface Anolog Triple YUV to RGB Output Converter Image Panel I/F Digital Zoom/ Data Frame Rate TMDS Caputure/ Gamma [48-bits] TMDS Brightness, Shrink/ Path/ Conversion Measure.
  • Page 35 CAT24WC08J-TE13 8P BLOCK DIAGRAM DIP Package(p) SOIX Package(J) EXTERNAL LOAD V CC V CC SENSE AMPS D OUT SHIFT REGISTERS V SS V SS V CC COLUMN V SS WORD ADDRESS DECODERS BUFFERS TSSOP Package(U) START/STOP LOGIC V CC E PROM XDEC V SS CONTROL...
  • Page 36 S524C20D11/20D21/80D41/80D81 SERIAL EEPROM PIN FUNCTION Wp SCL SDA Circuit Name Type Description Type A0, A1, A2 Input pins for device address selection. To configure a device adress, Input these pins should be connected to the Vcc of Vss of the device. Ground pin.

  • Page 37: Schematic Diagram

    SCHEMATIC DIAGRAM 1. GM5020 - 37 -...
  • Page 38 2. MEMORY - 38 -...
  • Page 39 3. LVDS - 39 -...
  • Page 40 4. MICOM - 40 -...
  • Page 41 5. DC/DC - 41 -...
  • Page 42 6. CONNECTOR - 42 -...
  • Page 43 7. INPUT SWITCHING - 43 -...
  • Page 44 8. CONTROL KEY - 44 -...
  • Page 45 9.USB - 45 -...
  • Page 46 10. POWER - 46 -...
  • Page 47 11. AUDIO - 47 -...
  • Page 48 12. AUDIO - 48 -...
  • Page 49 Mar. 2002 P/NO : 3828TSL075C Printed in Korea...

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