LG Flatron W1943SB Service Manual
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LG Flatron W1943SB Service Manual

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See also: Owner's Manual , User Manual

COLOR MONITOR

SERVICE MANUAL

MODEL: 
LGD TLC1, W1943SB-PFT.A**VAPH for AUO V00 )
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
                                                                                                                                                              *To apply the Novatek Chip. 
W1943SB
( W1943SB-PFT.A**NAPH for
- 1 -
E-mail: http://www.LGEservice.com/techsup.html
**Sales Market

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  • Page 1: Color Monitor

    E-mail: http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL W1943SB MODEL:  ( W1943SB-PFT.A**NAPH for LGD TLC1, W1943SB-PFT.A**VAPH for AUO V00 ) **Sales Market CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.                                                                                                                                                               *To apply the Novatek Chip.  - 1 -...

  • Page 2: Table Of Contents

    CONTENTS SPECIFICATIONS ...........2 SERVICE MODE ............17 PRECAUTIONS ............3 TROUBLESHOOTING GUIDE ......18 TIMING CHART ............7 WIRING DIAGRAM ........... 24 DISASSEMBLY ............8 EXPLODED VIEW............25 BLOCK DIAGRAM...........11 REPLACEMENT PARTS LIST ......... 27 DISCRIPTION OF BLOCK DIAGRAM ....13 DIFFERENT PARTS LIST….......... 34 ADJUSTMENT ............

  • Page 3: Precautions

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  • Page 7: Timing Chart

      TIMING CHART Front Back Resol- Frequency Total Display Sync. mode section polarity CLOCK Porch Porch ution [kHz]/[Hz] Period(E) [MHz] H(Pixels) 31.468 720 X 28.321 V(Lines) 70.08 H(Pixels) 31.469 640 x 25.175 V(Lines) 59.94 H(Pixels) 37.5 640 x 31.5 V(Lines) H(Pixels) 37.879 1056...

  • Page 8: Disassembly

      DISASSEMBLY-Set Put the monitor on a soft flat. Revolve the release button.   Consequently, pull the base directly. The base. Put the front cover upward. Then let the all Put the front face down, disassembly back latches are separated. cover.
  • Page 9   ＃8 Pull the key board out of bezel. Disassembly the bezel. Disassembly the LVDS cable. Disassemble the connector. Main board and power board. The panel. - 9 -...
  • Page 10   Rear cover and hinge ASS’Y. Disassemble the rear cover and hinge ASS’Y. Disassemble the hinge and stand. Hinge top, hinge and stand. - 10 -...

  • Page 11: Block Diagram

      BLOCK DIAGRAM - 11 -...
  • Page 12   BLOCK DIAGRAM-POWER Power EMI filter Rush Rectification Transformer Diode   100~240V prevention rectifier   14.5V Starting resistor Switching Feedback 5V/14.5V circuit (PWM OVP protect control output OVP control IC & circuit circuit MOSFER) Inverter LC resonance 14.5V Transformer Push-pull conversion circuit 2 CCFL lamps...

  • 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 85.5MHz.

  • 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 Operating System: DOS, windows98, 2000, XP 1. Parallel port setting Enter your bios, and do as followings. a) Integrated peripheral b) Super IO Device c) Parallel port mode you should set the” parallel port mode” to SPP for using the DOS EDID tool surely. 2.
  • Page 16   Please check Manufacturer Name、 Vendor Assigned Code、 Monitor Name、 Serial Number： *****[???????? ******] (it must be the same as Bar Code)、 Week of Manufacture：**、Year of Manufacture：****、Check sum：** (It must be the same as the last byte of data table, as follows picture shows). Above of all must be right, then if it shows the green “PASS”, it means record succeeds ,the red “Fail”...

  • Page 17: Service Mode

        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) CLEAA ETI: To initialize using time.

  • Page 18: 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 100-240v is normal Measure C707 (+) Check CN404 or replace =1.8V C707, and U701 U701 PIN2=3.3V Check X401 oscillate Replace X401 waveforms are normal...
  • Page 19   2. NO RASTER (OSD IS NOT DISPLAY)-LIPS   No Raster (OSD Is Not Displayed) Check power board and find out a Check CN404 short point as penning each power PIN 6, PIN7 =5V? line Check U701 Check U701 Check C702 PIN 2 =3.3V? 1.
  • Page 20   3. NO RASTER (OSD IS NOT DISPLAY)-MSTAR   No Raster (OSD Is Not Displayed) SCALER PIN 63, 1. Check C411 C412 64 OSCILLATES 2. Check X401 AS 12MHZ? 3. TROUBLE IN SCALER IC CHECK CONNECTION SCALER IC LINE FROM D-SUB TO PIN 14 H SYNC ? SCALER PIN 15 V SYNC?
  • Page 21   4. TROUBLE IN DPM   TROUBLE IN DPM SCALER IC PIN 14 H SYNC? CHECK H/V SYNC LINE PIN 15 V SYNC? TROUBLE IN CABLE OR LCD MODULE - 21 -...
  • Page 22   5. POWER No Power (Power Indicator Off) Check AC line Check AC line volt Check F901, BD901 Check the voltage of C907(+) Check start Check D901, R903, voltage for the pin1 R904,R905,U901 of U901 Check U901 pin 6 Check D902,C911   Vcc is 13v? Check U901 PIN5 Check D904,Q901  ...
  • Page 23   6. RASTER   NO Raster (Lamp Off) Check C811 (+) Check power section =14.5V Check Interface section or Check ON/OFF signal main board   CheckIC801 pin Check C807, C809, C810 2=5V?   Check IC801 Check IC801 pin 5/pin6 Pin1/pin15 have the output of sawtooth Replace IC801 Check Q806 pin5,...

  • Page 24: Wiring Diagram

      WIRING DIAGRAM 095G8018 3XH55 095G 825 9W524 095G820H 6D515 - 24 -...

  • Page 25: Exploded View

      EXPLODED VIEW       - 25 -...

  • Page 26: Exploded View Parts List

      EXPLODED VIEW PARTS LIST Ref. No. TPV part no. LGE part no. Description 705GQ9CS025 BEZEL ASSY KEPC8QG2 KEY BOARD 750GLG185W1C12M0LG PANEL LM185WH1-TLC1 NJ LGD 750GLU185X1012N000 PANEL M185XW01 V00 SZ AUO 756GQ8CB KL008 MAIN BOARD-CBPCRNFLGQ1 756GQ8CB KL009 MAIN BOARD-CBPCRNFLGQ1 PWPC8921MYE1 POWER BOARD Q15G0414201 MAINFRAME...

  • Page 27: Replacement Parts List

      REPLACEMENT PARTS LIST DATE: 2009. 3. 6 T8RGNFNBMWLFNN LOC. NO. PART NO. DESCRIPTION MAIN BOARD CAPACITOR C101 065G0402473 12 CHIP 0.047UF 16V X7R C102 065G0402220 31 CHIP 22PF 50V NPO C103 065G0402330 31 CHIP CAP 0402 33PF J 50V NPO C105 065G0402473 12 CHIP 0.047UF 16V X7R...
  • Page 28   C449 067G 215101 3T 100UF +-20% 16V C451 065G0603106 05 CAP CHIP 0603 10UF K 6.3V X5R C701 065G040210412T CHIP 0.1UF 16V X7R C702 067G 215101 3T 100UF +-20% 16V C703 065G040210412T CHIP 0.1UF 16V X7R C704 067G 215101 3T 100UF +-20% 16V C706 065G040210412T...
  • Page 29   R120 061G0402472 RST CHIPR 4.7 KOHM +-5% 1/16W R121 061G0402472 RST CHIPR 4.7 KOHM +-5% 1/16W R405 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R406 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R407 061G0402392 RST CHIP 3.9K 1/16W 5% R409 061G0402203 RST CHIP 20K 1/16W 5%...
  • Page 30   CN404 033G3802 9B Y CONNECTOR 9P 2.0 CN405 033G8027 30 H WAFER 30P 2.0MM RIGHT ANGLE CN407 033G3802 7B Y CONNECTOR 7P 2.0 DIP POWER BOARD CAPACITOR C804 065G080510522K CAP CHIP 0805 1UF K 25V X7R C805 065G0805222 31 0805 2200PF C806 065G080510522K...
  • Page 31   C920 067G215P4713AV CAP 105℃ 470UF M 16V C921 065G0603104 12 CER2 0603 X7R 16V 100N P DIODE BD901 093G 50460 28 BRIDGE DIODE KBP208G LITEON D801 093G 64 33 DIO SIG SM BAV99 (PHSE)R D802 093G 64 33 DIO SIG SM BAV99 (PHSE)R D806 093G 64 33 DIO SIG SM BAV99 (PHSE)R...
  • Page 32   R841 061G0805487 0F RST CHIPR 487 OHM +-1% 1/8W R842 061G1206220 RST CHIPR 22 OHM +-5% 1/4W R846 061G0805511 RST CHIPR 510 OHM +-5% 1/8W R847 061G0805105 RST CHIPR 1M OHM +-5% 1/8W R858 061G0805751 RST CHIPR 750 OHM +-5% 1/8W R900 061G1206624 RST CHIPR 620 KOHM +-5% 1/4W...
  • Page 33   CN902 095G 825 9W524 WIRE HARNESS 9P(SCN)-9P(2008)120MM F901 084G 41004 L 877SERIES 4A 250V F901 006G 31502 1.5MM RIVET F902 095G 90 23 JUMPER WIRE F903 095G 90 23 JUMPER WIRE FB901 071G 55 29 FERRITE BEAD 090G6064 1 HEAT SINK J801 095G 90 23...

  • Page 34: Different Parts List

      DIFFERENT PARTS LIST W1943SB Diversity of T8RANFNBMWLFNN Compared with T8RGNFNBMWLFNN Location Part No. for TPV Description 705GQ934029 REAR COVER/HINGE ASS'Y Q34G0573 B6 4K0100 REAR COVER L185W-9LG 750GLU185X1012N000 PANEL M185XW01 V00 SZ AUO 756GQ8CB KL009 MAIN BOARD-CBPCRNFLGQ1 SMTCR-U402 100GKNA8000N11 MCU ASS'Y-056G1133 81 Q15G0414401 MAINFRAME - 34 -...

  • Page 35: Schematic Diagram

      SCHEMATIC DIAGRAM 1. SCALER   2.INPUT 3.SCALER 4.PANEL INTERFACE BIN+ PANEL_EN BIN+ BIN+ PANEL_EN PANEL_EN BIN- BIN- BIN- SOGI SOGI SOGI GIN+ GIN+ GIN+ GIN- GIN- GIN- RIN+ TCLK1P RIN+ RIN+ TCLK1P TCLK1P RIN- TCLK1M RIN- RIN- TCLK1M TCLK1M HSIN HSIN HSIN...
  • Page 36 NC/0R05 1/16W VGA_B+ VGA_R+ I/O2 I/O3 R119: 4.7K 5,6,7 R122: 0 ohm AZC199-04S C114 U101: NC D101 Inte. edid C116: NC f or LG BAV70 R119: NC only D102: NC ESD_5V U103 R122: NC DSUB_SDA H_Sy nc R119 I/O1 I/O4...
  • Page 37   FB404 VCC3.3 DVDD 120 OHM VCC3.3 C451 C450 C430 ADC_3.3 ADC_1.8 CVDD_3.3 C431 CVDD_1.8 10UF6.3V 0.1UF 16V 4.7uF/16V DVDD U401 BIN+ BIN1+ T0M 6 BIN- BIN1- T0P 6 SOGI SOG1I T1M 6 VCC1.8 GIN+ GIN1+ T1P 6 ADC_1.8 GIN- T2M 6 GIN1- RIN+...
  • Page 38   NC/CN403 CN405 PANEL_VCC TCLK1M TCLK1P TCLK1P TCLK1P TCLK1M TCLK1M TCLK1M TCLK1P CONN TCLK1P TCLK1M NC/CONN PANEL_VCC R433 10K 1/16W 5% Q403 NC/AO4411 AO3401L Q405 R436 56K 1/16W 5% AO3401 R418 C419 0.22uF16V R435 22K 1/16W 5% Q404 PANEL_EN 2N3904S-RTK/PS R415 4K7 1/16W 5% C441...
  • Page 39   U701 AP1117D33L-13 TO252 del D702, 5VCC CN404 D703,D701 U702 4,5,6 5VCC NC/AME8810-AEGTZ 0.6A/3.3V VOUT(heat sink) VCC3.3 BKLT-VBRI BKLT-EN C_PANEL_INDEX Volume VCC3.3 5 Mute SOT223 R701 C711 C701 NC/10K 1/16W 5% 0.1UF 16V CONN NC/4.7uF/16V C702 C703 100uF/16V 0.1UF 16V R703 R702 Volume# 5...
  • Page 40   2. POWER R915 J903 100 OHM 1/4W C913 L903 +14.5V 0.001uF R916 ZD901 100 OHM 1/4W 1.1uH BD901 C907 100UF450V C912 R909 R917 R924 JUMPER 1500PF2KV 100K OMH 2W +-5% 100 OHM 1/4W 100OHM 2W D905 MTZJ T-72 16B KBP208G C917 1000UF25V...
  • Page 41   3. INVERTER PT801 CN801 C825 CONN 12PF6KV R836 +14.5V 33G8021 2E U 1K 1/8W 5% 65G 6J1206ET 61G0805102 C811 C828 R829 470UF25V 0.1uF 33 OHM 1/4W 67T215P4714AV 65G0805104 32 61G1206330 C813 POWER X'FMR 1000pF R818 CN802 33 OHM 1/4W CONN 65G0805102 31 C826...
  • Page 42   Mar.2009 P/NO: Printed in China - 42 -...

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