LG Flatron W1943TB Service Manual
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LG Flatron W1943TB Service Manual

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See also: Owner's Manual , User Manual

COLOR MONITOR

SERVICE MANUAL

MODEL: 
LGD TLC1, W1943TB-PFT.A**VAPH for AUO V00 )
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
                                                                                                                                                              *To apply the Novatek Chip. 
W1943TB
( W1943TB-PFT.A**NAPH for
- 1 -
E-mail: http://www.LGEservice.com/techsup.html
**Sales Market

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Summary of Contents for LG Flatron W1943TB

  • Page 1: Color Monitor

    E-mail: http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL W1943TB MODEL:  ( W1943TB-PFT.A**NAPH for LGD TLC1, W1943TB-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….......... 35 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) CLEAR 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 C704 (+) Check CN701 or replace =1.8V C704, and U703 U703 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 CN701 short point as penning each power PIN 6, PIN7 =5V? line Check U703 Check U703 Check C706,C707 PIN 2 =3.3V? 1.
  • Page 20   3. NO RASTER (OSD IS NOT DISPLAY)-MSTAR   No Raster (OSD Is Not Displayed) SCALER PIN 127, 1. Check C420 C421 128 OSCILLATES 2. Check X401 AS 12MHZ? 3. TROUBLE IN SCALER IC CHECK CONNECTION SCALER IC LINE FROM D-SUB TO PIN 41 H SYNC ? SCALER PIN 42 V SYNC?
  • Page 21   4. TROUBLE IN DPM   TROUBLE IN DPM SCALER IC PIN 41 H SYNC? CHECK H/V SYNC LINE PIN 42 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 main board   signal 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 705GQ9CS014 ACQ74060001 BEZEL ASSY KEPC8QG2 EBU60704501 KEY BOARD 750GLG185W1C12M0LG EAJ60134501 PANEL LM185WH1-TLC1 NJ LGD EAJ59066901 750GLU185X1012N000 PANEL M185XW01 V00 SZ AUO EAJ59066902 EBU60705001(FOR 756GQ8CB KL010 MAIN BOARD-CBPCRNDLGQ1 MODULE) EBU60704601(FOR 756GQ8CB KL011...

  • Page 27: Replacement Parts List

      REPLACEMENT PARTS LIST DATE: 2009. 3. 6 T8RGNDNBMWLFHN LOC. NO. PART NO. DESCRIPTION MAIN BOARD CAPACITOR C102 065G0402473 12 CHIP 0.047UF 16V X7R C103 065G0402220 31 CHIP 22PF 50V NPO C104 065G0402220 31 CHIP 22PF 50V NPO C105 065G0402509 31 CHIP 5PF 50V NPO C106 065G0402473 12...
  • Page 28   C435 065G040210412T CHIP 0.1UF 16V X7R C438 065G0805105 12 1UF +-10% 6V X7R C439 065G060310517T MLCC 0603 CAP 1UF Z 16V Y5V C440 065G0805475A7Z CAP CHIP 4.7UF 10V Y5V -20%~+80% C442 065G040210412T CHIP 0.1UF 16V X7R C446 065G040210412T CHIP 0.1UF 16V X7R C447 065G040210412T CHIP 0.1UF 16V X7R...
  • Page 29   R115 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R116 061G0402750 RST CHIPR 75 OHM +-5% 1/16W R117 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R118 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R119 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R120 061G0402102 RST CHIPR 1 KOHM +-5% 1/16W...
  • Page 30   R445 061G0402392 RST CHIP 3.9K 1/16W 5% R446 061G0402000 RST CHIP MAX 0R05 1/16W R462 061G0402105 RST CHIPR 1MOHM +-5% 1/16W R465 061G0402222 RST CHIPR 2.2 KOHM +-5% 1/16W R466 061G0402000 RST CHIP MAX 0R05 1/16W R468 061G0603101 RST CHIPR 100 OHM +-5% 1/10W R702 061G0402102 RST CHIPR 1 KOHM +-5% 1/16W...
  • Page 31   C837 065G0805391 31 CHIP 390PF 50V C838 065G0805473 32 CHIP 0.047UF 50V X7R C839 065G 3J3096ET 3PF,J,3KV,Z5P C841 065G0805392 31 CHIP 3900PF 50V X7R 0805 C900 065G306M3322BP 3300PF 20% C901 065G306M1022BP 1000PF Y1.CAP C902 065G306M1022BP 1000PF Y1.CAP C903 063G107K474 US 0.47UF +-10% C903 006G 31502...
  • Page 32   Q901 057G 667 56 MOSFET 7A/650V FMA07N65GX TO-220F Q901 057G 724 11 STP9NK65ZFP Q901 006G 31502 1.5MM RIVET Q902 057G 761 16 TRA KTD1028 KEC U901 056G 379111 IC LD7577 GS SOP-8 U902 056G 139 3A IC PC123Y22FZ0F U903 056G 158 12 KIA431A-AT/P TO-92 RESISTOR...
  • Page 33   R918 061G1206101 RST CHIPR 100 OHM +-5% 1/4W R919 061G1206101 RST CHIPR 100 OHM +-5% 1/4W R920 061G1206101 RST CHIPR 100 OHM +-5% 1/4W R921 061G0805151 RST CHIPR 150 OHM +-5% 1/8W R922 061G0603100 1F RST CHIPR 1 KOHM +-1% 1/10W R923 061G0603100 1F RST CHIPR 1 KOHM +-1% 1/10W...
  • Page 34   L901 006G 31502 1.5MM RIVET L903 073G 253191 H IND CHOKE 1.1UH DADON L904 073G 253191 H IND CHOKE 1.1UH DADON - 34 -...

  • Page 35: Different Parts List

      DIFFERENT PARTS LIST W1943TB Diversity of T8RANDNBMWLFHN Compared with T8RGNDNBMWLFHN Location Part No. for TPV Description 705GQ934028 REAR COVER/HINGE ASS'Y Q34G0573 B6 3K0100 REAR COVER L185W-9LG 750GLU185X1012N000 PANEL M185XW01 V00 SZ AUO 756GQ8CB KL011 MAIN BOARD-CBPCRNDLGQ1 SMTCR-U402 100GKNA8001N11 MCU ASS'Y-056G1133 81 Q15G0414301 MAINFRAME - 35 -...

  • Page 36: Schematic Diagram

      SCHEMATIC DIAGRAM 1. SCALER   FB102 R102 VGA_B+ R105 100R 1/16W 5% C102 0R05 1/10W 5% BEAD 0.047uF H_Sy nc R103 100R 1/16W 5% V_Sy nc R104 R108 C105 100R 1/16W 5% 5pF/50V 5VCC 75R 1/16W 5% R106 R107 C103 C104 VGA_B-...
  • Page 37   CN302 CN301 LVB0M RXO0- PANEL_VCC LVB0P RXO0+ LVB0M RXO0- RXO0+ LVB0P LVB1M RXO1- FB301 LVB1M RXO1- RXO1+ LVB1P LVB1P RXO1+ LVB2M RXO2- RXO2+ LVB2P LVB2M RXO2- LVBCKM RXOC- RXOC+ LVBCKP LVB2P RXO2+ LVB3M RXO3- RXO3+ LVB3P LVA0M RXE0- RXE0+ LVA0P 120 OHM C305...
  • Page 38   5VCC CN701 Both 223 and 252 5VCC foot-print R701 NC/10K 1/16W 5% BKLT-VBRI BKLT-EN R710 NT60670B OPTION PANEL_ID# 5 R703 NC/10K 1/16W 5% Volume# 5 R707 NC/4K7 1/16W 5% Mute 5 U704 SOT223 NC/AP1117E18LA C703 CONN C701 C710 C712 NC/0.1UF 16V NC/1N 50V lock type...
  • Page 39   DVDD DVDD FB403 C401 R414 C411 U402 VCC1.8 CVDD 300OHM 0.22uF16V R440 R441 NC/0.22uF16V FB401 FB406 SPI_CE NC/4K7 1/16W 5% NC/4K7 1/16W 5% U403 AVCC PVCC 300 OHM 300OHM SPI_SO HOLD# R409 100R 1/16W 5% SPI_CK SPI_SI EE_WP C406 C407 C442 R413...
  • 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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