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8      SVC_BOM LISTING FOR LGE PART NO 

786LS SVC BOM   

 

 

 

 

No.  LG Part No. 

Desc. 

AOC Part No. 

Desc. 

Q'TY 

CBPC782KKGLM 

Main Board Ass'y 

1 

1 

3911TKK425B 

Main Board Ass'y 

 

 

( = Conversion Board ) 

 

 

KEPC782KA3 

Key Board Ass'y 

1 

2 

3911TKK425C 

Control Board Ass'y 

 

 

 

 

 

 

DCPC780A7 

Power Board Ass'y 

1 

3 

3911TKK425E 

Power Board Ass'y 

 

 

 

 

 

 

ADPC12416AL 

LCD Adapter Ass'y 

1 

4 

 

 

3911TKK425D 

 

 

Adapter Ass'y 

 

 

 

 

 

 

79LL17-3-S Inverter 

1 

5 

 

 

3911TKK425F 

 

 

Inverter 

 

 

 

 

 

 

6  3911TKK426A 

Front Bezel 

705l782KF34-01 

Bezel Assy 

1 

 

 

 

 

 

 34L1001-AAL-4B 

Bezel 

1 

 

 

 

 

 

 33L4530-AL-L 

Key 

1 

 

 

 

 

 

 33L4531-1 

ORNAMENT 

1 

 

 

 

 

 

 

 

 

   

   

7  3911TKK426B 

Back Cover 

705L782KB34008 

Back Assy 

1 

 

 

 

 

 

 34L916-AM-2B 

Back 

Cover 

1 

 

 

 

 

 

 15L5791-1 

Kensington 

Metal 

1 

 

 

 

 

 

 33L4532-AAM-L 

LG 

Logo  1 

 

 

 

 

 

 Q1L1030-12-128 

 

 

4 

8 3911TKK426C 

Stand 

705L782KB34008  Stand 

Assy 

1 

 

 

 

 

 

 34L919-AM-B 

Stand 

1 

 

 

 

 

 

 15L5711-1 

Plate 

1 

 

 

 

 

 

 Q1L1030-10-47 

Screw 

2 

 

 

 

 

 

 12L381-1 

Foot 

Pad  4 

 

 

 

 

 

 37L448-1 

Hinge 

1 

 

 

 

 

 

 

33L4345-AM-L 

Dust Cover (PE) 

1 

 

 

 

 

 

 34L918-AM-B 

Dust Cover ( Stand 
Back) 1 

 

 

 

 

 

 

34L917-AM-B 

Dust Cover (Front) 

1 

 

 

 

 

 

 Q1L140-10-47 

Screw 

6 

3911TKK426E Hinge 

Cover 

33L4344-AM-1/2L 

Hinge Dust Cover 
(Back)(L) 1 

9 

3911TKK426F Hinge 

Cover 

33L4344-AM-1/3L 

Hinge Dust Cover 
(Back)® 1 

 

 

Power Cord 

 

 

Korea 

1 

 

 

Power Cord 

89L401A18NISA 

Japan 

1 

 

 

Power Cord 

89L404A18N YH 

Europe 

1 

 

 

Power Cord 

89L404A18N YH 

Russia 

1 

 

 

Power Cord 

89L410A18N IS 

UK 

1 

10 

 

 

Power Cord 

89L402A18N YH 

USA 

1 

11  3911TKK425G 

Signal Cable 

89L 174L17-10D 

786LS Signal cable   

1 

 

 3911TKK426D 

 

 

33L4345   

Signal Duster cover 

1 

12 

 

 Fuse  NA 

 

 1 

 

 

 

 

Carton Box 
Carton Box 

 

 

44L3265-689-3A 

Korea 
Janpan 

1 
1 

 

 

Carton Box 

44L3265-689-1A 

Europe/

UK/USA

 

1 

13 

 

 

Carton Box 

44L3265-689-2A 

Russia 

1 

 

All manuals and user guides at all-guides.com

Содержание 786ls

Страница 1: ...SERVICE MANUAL 17 LCD Monitor 786LS All manuals and user guides at all guides com a l l g u i d e s c o m...

Страница 2: ...BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL WE CANNOT GUARANTEE THE ACCURACY OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RE LIABILITY FOR CHANGES ERRORS OR OMISSIONS MANUFACTU...

Страница 3: ...NS 7 4 2 ADJUSTMENTS METHOD DESCRIPTION 7 8 4 3 FRONT PANEL CONTROL KNOBS 9 5 CIRCUIT SOFTWARE DESCRIPTION 10 5 1 SPECIAL FUNCTION WITH PRESS KEY 10 5 2 CIRCUIT FUNCTION DESCRIPTION 10 11 5 3 SOFTWARE...

Страница 4: ...ncies Horizontal 30 KHz 83 KHz Vertical 55 Hz 75 Hz Pixel clock 135 MHz 6 Factory Preset Timing 17 User Timings 13 Input signal tolerance H tolerance 1 K V tolerance 0 5 Hz 7 Input Power Source Switch...

Страница 5: ...l The Adapter will provides the 12V DC power 4 16 Amp to Main board and Inverter module Monitor Block Diagram 1 2 Interface Connectors A AC Power Cable B Video Signal Connectors and Cable C External A...

Страница 6: ...change variable resistance settings in MAIN BOARD they are adjusted to the most suitable value If they are changed it might happen LUMINANCE does not satisfy the white balance spec 3 Please consider t...

Страница 7: ...e connector information is as follow 15 Pin Color Display Signal Cable PIN NO DESCRIPTION PIN NO DESCRIPTION 1 RED 9 5V power from VGA card 2 GREEN 10 GND 3 BLUE 11 SYNC GND 4 GND 12 SDA 5 GND 13 HORI...

Страница 8: ...to 7200 color and MEM channel 2 to 6500 color our 7200 parameter is x 302 20 y 319 20 Y 200 20cd m2 and 6500 parameter is x 313 20 y 329 20 Y 200 20 cd m2 How to setting MEM channel you can reference...

Страница 9: ...ve the adjustment result b adjust 6500 color temperature 1 Set the Contrast of OSD function to 45 and Adjust Brightness to chroma 7120 Y 240 5 cd m2 2 Switch the chroma 7120 to RGB mode with press MOD...

Страница 10: ...he Chroma to pattern 1 crosshatch pattern or WIN98 95 full white pattern confirm above item 2 3 functions clock focus was done well if that 2 functions failed the H V position will be failed too Adjus...

Страница 11: ...gital data with interpolation process zooming generated the OSD font perform overlay function and generate drive timing for LCD PANEL 2 U302 89C51RD2 PHILIPS MCU type 8052 series with 64k Rom size and...

Страница 12: ...MZAN2 U200 LVDS chip U601 U602 Panel Power Control U202 MCU U302 Data Digital RGB Panel Control Signal Phs Pvs PclkA B Pdispe Panel Power 5V Communication signal Hclk Hfs Hdata0 Input analog RGB H V d...

Страница 13: ...lue Initial GMZAN2 Yes POWER ON START Initial MCU I O Interrupt vector Ram Initial 1 POC backlight counter 2 Clr all mode value Yes Check if in Factory mode when power on press the MENU Button will be...

Страница 14: ...t support be confirm Set mode index parameter Set change mode flag No No Yes Yes confirm the frequency Hsyn or Vsyn from IFM already been changed check the change mode flag Process turn off OSD settin...

Страница 15: ...t Block Check U200 Data output Block OK Panel Power OK Replace Inverter and Check Inverter control relative circuit Re do White balance adjust OK U200 data OK Check Power switch is in Power on status...

Страница 16: ...relative circuit R315 Q304 R311 In normal operation when LED green R315 Bklt On should 0 v If Bklt On no response when the power switch turn on off Replace the MCU NG OK Re do white balance OK Measur...

Страница 17: ...nough Yes Voltage normal Check the LVDS Power L601 L602 L603 L604 L900 3 3V Check the both U601 U602 LVDS Input pin 31 45mhz 65mhz and pin 27 Vsyn freq pin 28 45khz 65 khz Yes Voltage normal Yes Frequ...

Страница 18: ...and crystal OK Check U302 MCU pin 43 42 41 40 39 at High state 5V without press any key Mechanical was stuck Check NG NG If still no Led green indicator check Q102 R106 LED at keyboard cold solder or...

Страница 19: ...U200 Gmzan2 was shut down and only U302 MCU still working that means the monitor is in power saving status all power system is working well OK Check U304 pin 2 is a stable rectangle wave Around 150k...

Страница 20: ...your noise only exist in one mode only ex only at 1280x1024 75 Hz other is normal OK OK Yes has extension NG interferences still exist NG NO additional extension cable That was cause by you VGA CARD...

Страница 21: ...ightness maximal RGB 50 Quit from OSD screen measured Y luminance With chroma 7120 check Y 240 10 cd m2 NG If the Y less than 200 cd m2 after the contrast brightness max then change the LAMP of panel...

Страница 22: ...NO SM02B BHSS 1 TB PIN SYMBOL DESCRIPTION 1 HV OUTPUT Input H V to lamps 2 RETURN Return to control C FUNCTION SPECIFICATIONS The data test with the set of SAMPO DC TO DC CONVERTER ROOM TEMPERATURE 2...

Страница 23: ...22 D FUNCTION TEST CIRCUIT CON1 1 2 3 4 5 120K 120K 120K 120K 10 10 10 10 VT 181 1 2 1 2 VT 181 VT VT 1 2 1 2 CON2 CON3 CON4 CON5 All manuals and user guides at all guides com...

Страница 24: ...D F1 4 0A 63V TO CHECKED Q4 Q6 VOUT 9V TO CHECKED L1 L2 INPUT 9V TO L1 OR L2 TO CHANGED CH1 Q4 Q3 Q11 CH2 Q5 Q6 Q12 TO CHANGED CH1 Q7 Q8 D12 PT1 CH2 Q9 Q10 C13 PT2 FUNCTION TEST OK 1 SHORT R30 OPEN LO...

Страница 25: ...IP THE OSCILLATOR FREQUNCY RANGE 150 250 KHZ TO CHANGE C6 CHIP OR IC CHIP FUNCTION TEST OK IF ENABLE ABNORMALITY 1 TO CHECK IC PIN 9 TURN ON HAVE 12 VOLTAGES TO CHANGE ON Q1 Q2 FUNCTION TEST OK IF DIM...

Страница 26: ...2 AC VTVM VT 181E 3 DIGITAL MULTIMERTER MODEL 34401 4 HIGHTVOLT PROB MODEL 1137A 5 SCOPE MODEL V 6545 IF TRANSFORMER ABNORMELITY TO CHECK C3 C4 CHIP OUTLINE OR TRANSFORMER TO CHANGE C3 C4 OR TRANSFORM...

Страница 27: ...26 7 MECHANICAL OF CABINET FRONT DIS ASSEMBLY All manuals and user guides at all guides com...

Страница 28: ...1TKK426C Stand 705L782KB34008 Stand Assy 1 34L919 AM B Stand 1 15L5711 1 Plate 1 Q1L1030 10 47 Screw 2 12L381 1 Foot Pad 4 37L448 1 Hinge 1 33L4345 AM L Dust Cover PE 1 34L918 AM B Dust Cover Stand Ba...

Страница 29: ...3911TKK425J CN603 33L801724A H Connector Panel 1 17 3911TKK425K CN302 33L3802 9H Connector Key 1 18 3911TKK425L Cn303 33L3802 5H Connector Inverter 1 Screw Assy M1L330 6 128 Screw 10 M1L1030 10 128 S...

Страница 30: ...system LM2596S 5 12V to 5V 5A SPEC 5V To CPU Eeprom 24c21 control inverter on off 860mA when Cable not Connected 841mA when Normal operation To Hyundai 300 Panel around 1450mA AIC1084 5V to 3 3V 5A SP...

Страница 31: ...connector Inverter connector MCU Panel Power Control AIC1084 5V to 3 3v LVDS power LT1117 5V to 3 3v LM2596 convert 12V to 5V Input Connector DDC chip RT9164 5V to 2 5v Audio connector All manuals and...

Страница 32: ...2002 Title Size Document Number Rev Date Sheet of RT9164 2 5V CRYSTAL2 50MHZ OUT VCC 2 5V 3 3V LM2596 5 0V 5 0V 12V 5V 5V 5V 3 3V ZAN2 SCALER TCLK1 3 3V MFB2 MFB7 MFB8 MFB9 HCLK HFS IRQ HDATA0 RST RST...

Страница 33: ...A ADC_GND2 ADC_GND1 SUB_GNDA ADC_GNDA ADC_BGNDA ADC_GGNDA ADC_RGNDA OSD_DATA3 OSD_DATA2 OSD_DATA1 OSD_DATA0 OSD_CLK OSD_VREF OSD_HREF OSD_FSW PD47 PD46 PD45 PD44 PD43 PD42 PD41 PD40 PD39 PD38 PD37 PD3...

Страница 34: ...TXO6 TXE5 PCLKB PD40 GND GND PD34 PD23 PD47 TXE0 TXO4 GND TX3 E PD4 TXO10 GND PD3 TXE9 TX2 E PD27 C605 10uF 16V EVEN TX0 E PD33 C613 10uF 16V TXE2 C606 0 01UF L601 BEAD 120 PHS PD26 PD12 PD30 100uF C6...

Страница 35: ...403 1K PS3 VR501 10 K OP W R239 4 7K OP HDATA0 C401 22uF R300 10 K R402 620 12V A5V U300 24LC04B 5 6 7 8 1 2 3 4 SI SCK WP VCC A0 A1 A2 VSS GND R321 0 OP GND C954 1000PF VGA_CON GND KEY 5V GND C316 22...

Страница 36: ...84 1 2 3 GND Vout Vin GND C952 1000PF GND GND GND 5V J1 12V POWER GND F A5V D5V JP301 1 2 3 D300 B320 U304 LM2596S 5 0 Si8050 TO263 1 5 4 3 2 VIN ON FBK GND Vout GND 5V U306 4431 1 2 3 4 8 7 6 5 S1 S2...

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