AOC 831S Service Manual
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AOC 831S Service Manual

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Service Manual
AOC831S
LCD 显示器维修手册
Custom：
AOC
Model：
831S
1

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Summary of Contents for AOC 831S

  • Page 1 Service Manual AOC831S LCD 显示器维修手册 Custom： Model： 831S...

  • Page 2: Revision List

    Service Manual AOC831S REVISION LIST Version Release Date Revision History Model TPV Model No T8RSM5NQW5A1NNJ T8RSM5NMW5A1NNJ T8RSM5NCW5A2NNJ T8RSM5NBW5A2NNJ T8RMM5NCW5A2NNJ T8RKM5NQW5A2NNJ Jun-18-2010 Initial Release 831S T8RKM5NMW5A4NNJ T8RKM5NCW5A1NNJ T8RKM5NBW5A2NNJ T8RCM5NCW5A5NNJ T8RCM5NCW5A13NJ T8RCM5NBW5K2NNJ T8RAM5NCW5A1NNJ...

  • Page 3: Table Of Contents

    Service Manual AOC831S CONTENTS 1. LCD Specifications ------------------------------------------------------------------------------------------------------------ 4 1.1 Product Features ----------------------------------------------------------------------------------------------------------- 4 1.2 Factory Preset Timing ----------------------------------------------------------------------------------------------------- 5 2. Operation Instruction --------------------------------------------------------------------------------------------------------- 6 2.1 Control Button -------------------------------------------------------------------------------------------------------------- 6 2.2 OSD Menu Adjusting ----------------------------------------------------------------------------------------------------- 7 2.3 OSD Lock Function ------------------------------------------------------------------------------------------------------- 7 3.

  • Page 4: Lcd Specifications

    Service Manual AOC831S 1. LCD Specifications 1.1 Product Features Monitor Model AOC 831S Driving system TFT Color LCD 470mm（18.5inch） diagpnal LCD Panel Active Display Area 409.8mm (W)×230.4mm(H) Pixel Pitch 0.3 mm×0.3mm R,G,B Analog Interface，75ohm,0.7V Video Input Separate Sync. H/V TTL H-Frequency 30kHz—81kHz...

  • Page 5: Factory Preset Timing

    Service Manual AOC831S 1.2 Factory preset modes HORIZONTAL VERTICAL STANDARD RESOLUTION FREQUENCY FREQUENCY 640 × 400 31.469kHz 70.087Hz DOS-mode 720 × 400 31.469kHz 70.087Hz Mac-mode 832 ×624 49.725kHz 74.55Hz 31.469kHz 59.94Hz 640×480 35.00kHz 66.667Hz 640×480 37.861kHz 72.80Hz 640×480 640 × 480 37.50kHz 75.00Hz 800 ×...

  • Page 6: Operation Instruction

    Service Manual AOC831S 2. Operation instruction Generalization Press the power button to turn the monitor on or off. The other control buttons are located at front panel of the monitor. By changing these settings, the picture can be adjusted to your personal preferences. The power cord should be connected.

  • Page 7: Osd Menu Adjusting

    Service Manual AOC831S 2.2 OSD User mode adjustment a) OSD Menu adjustment steps: 1.Press MENU button to display OSD main menu of as below, Press Left button or Right button may select other main Menu. 2. Press MENU button to adjust items of each main menu. 3.

  • Page 8: Interface Description

    Service Manual AOC831S 3.Interface description 3.1 VGA 15pin Connector Pin No. Description Pin No. Description Red Input +5VDC Green Input Logic GND Blue Input SDA- DDC-Serial Data Connection detect H Sync Red GND V Sync Green GND SCL- DDC-Serial Clock Blue GND VGA Connector layout...

  • Page 9: Panel Feature

    Service Manual AOC831S 4. Panel Feature The Panel-CLAA185WA03 is a 18.51 inch wide TFT-LCD module with an intergral CCFL Backlght unit and a 30-pin 2ch –LVDS interface . This module supports 1366×768 WXGA+ resolution. and displays up to 16.7 millions colors.The converter module for the Backlight Unit is not built in.

  • Page 10: Electrical Characteristics

    Service Manual AOC831S 4.3 Electrical Characteristics a) TFT LCD module b) Backlight unit...

  • Page 11: Optical Characteristics

    Service Manual AOC831S 4.4 Optical Specifications 4.5 TFT LCD Module Block Diagram...

  • Page 12: Lcd Module Input Terminal Pin Assignment

    Service Manual AOC831S 4.6 LCD module input terminal pin assignment Connector:093G30-B2001A(STARCONN)

  • Page 13: Block Diagram

    Service Manual AOC831S 5.Block Diagram 5.1 LCD Block Diagram Monitor Block Diagram 2 CCFL backlight Panel LVDS DC-AC inverter Main Board AC-DC(5V/12V) Power Board PC- VGA Key board /DDC AC supply 90V-264V Input signal 5.2 MainBoard Block Diagram---715G2904 Crystal 14.318MHZ Panel Interface (CN403) (X401)

  • Page 14: Power Board Block Diagram

    Service Manual AOC831S 5.3 Power Board Block Diagram Power/ Board Block Diagram inverter Fuse Smoothing Rectifier Transformer Capacitor T901 Rectifier C907 AC input 100-240V Rectifier IC-PWM IC901 Q901 Rectifier Sense resistor Power part regulating PhotoCoupler Sampling Switching MOS DC-AC Resonance NET Q805-Q806 High Voltage 16V DC...

  • Page 15: Lcd Software Flow Chart

    Service Manual AOC831S 5.4 Software Flow Chart Start Software Flow Chart Initial_MCU Check if DataBuffer Is blank To Write default values Check if Sum is changed ? Brightness Contrast Read parameter_from Buffer Language InputType InputTimingStableCounter OsdCounter Init_GlobalVariables PowerDownCounter Initial_MCU Device while PowerHandler if standby mode?

  • Page 16: Circuit Schematic

    Service Manual AOC831S 6. Circuit Schematic 6.1 Main Board 1---715G2904-2-2 Input part---VGA+DDC H_Sy nc R101 0R05 1/10W 5% R102 100R 1/16W 5% DSUB_H V_Sy nc R103 100R 1/16W 5% FB102 DSUB_V R104 C101 VGA_B+ DSUB_B+ VCC3.3 R105 R106 C102 C103 BEAD 2K2 1/16W 5% 2K2 1/16W 5%...
  • Page 17 Service Manual AOC831S Power part---5V+3.3V+1.8V+Vlcd Due to LG doen't request PC'99 Function. 2008/01/14 BAT99 : If 0.05A,VF=1.0V D401 R458 ESD_5V BAV70 : If 0.05A,VF=1.0V ESD_5V It's need to use Low Dropout Regulator. 0Ohm 1/16W DSUB_5V OTHER BAV99 DSUB_5V 5 CMVCC D403 D401 5, 6...
  • Page 18 TSUM1PFR-LF RST circuit. U403 M24C04-WMN6TP C419 0.22uF16V U402 U402 For user data, WB, EDID, 010A Befor AOC ID2007 OSD R424 100R 1/16W 5% HDCP are saved in When NVRAM is used, R451 100R 1/16W 5% 020A For ID2008 Flash. POWER_KEY# and PANEL_ID#...
  • Page 19 Service Manual AOC831S Output---LVDS connector CN403 change to 14P Dip connector based on 715G2904-D CN403 PA[0..1] PB[0..9] PA[0..1] PB[0..9] LVB0P LVB0M PB6 LVB1P LVB1M LVB2P LVB2M LVBCKP LVBCKM PA[4..9] LVB3P LVB3M PA[4..9] CONN VCC3.3 CMVCC R438 R443 PANEL_VCC 0R05 1/16W NC/0ohm 2006-11-7 Add pull up 4K7 to MVCC AO3401L...

  • Page 20: Power Board

    NR901 NTCR HEAT SINK(D906_Q90G6263-6) MUTE ON/OFF C931 F901 0.1uF FUSE SHIELD(H85G0002-1) CONN HEAT SINK(Q901_Q90G6263-6) AOC 831S T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size Custom G2852-3-4-X-3-090210 TPV MODEL 絬 隔 瓜 絪 腹...

  • Page 21: Invweter Part

    220pF50V 10K 1/10W 1% 1K 1/8W 1K 1/10W 1% C817 C845 R862 2.2uF/16V 1M 1/10W 5% D814 LL4148 AOC 831S T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size Custom G2852-3-4-X-3-090210 TPV MODEL 絬 隔 瓜 絪 腹...

  • Page 22: Key Board

    Service Manual AOC831S 6.4 Key Board 715G2991 LED_RED# LED_GRN# D001 CN001 LBADC1 R002 2K OHM 1/4W LBADC2 DC_POWERON R003 0R05 1/10W 1% LED_GRN# LED_RED# C001 C002 C003 C004 C005 R004 2K OHM 1/4W R005 0R05 1/10W NC/0.001uF NC/0.001uF NC/0.001uF NC/0.001uF NC/0.001uF CONN SGND...

  • Page 23: Monitor Exploded View

    Service Manual AOC831S 7.Exploded Views...
  • Page 24 Service Manual AOC831S...
  • Page 25 Service Manual AOC831S...

  • Page 26: Pcb Layout

    Service Manual AOC831S 8. PCB Layout 8.1 MainBoard 1- 715G2904-2-2...

  • Page 27: Power Board

    Service Manual AOC831S 8.2 PowerBoard 715G2852-3-4...

  • Page 28: Key Board

    Service Manual AOC831S 8.3 KeyBoard ---715G2991...

  • Page 29: Main Board

    Service Manual AOC831S 9. Maintenance Trouble treatment 9.1 Maintainability Requirement Voltmeter. & digital multimeter Oscilloscope. Pattern Generator. DDC Tool with Compatible Computer. Alignment Tool. LCD Color Analyzer. Service Manual. User Manual. repair tools etc 9.2 Trouble Shooting Main Board---No Power No power Check flow chart For the no power...
  • Page 30 Service Manual AOC831S No picture (LED orange) No picture Check flow chart for the no signal Check signal wire Replace signal wire Check U404 Vout=3.3V; Q409-out=1.8V,Vlcd=5V replaceU404,Q410,Q409, &around device check X401 waveform replace X401 Check CN101-RGB/HS/VS Check Correspondent component Check U402/U403 out Updata soft data Replace U401 Whitescreen...
  • Page 31 Service Manual AOC831S Power Board--- No Power 5V/12V Check flow chart Check CN901 100-240V？ For the no power Check AC supply Check rectified voltage-C907 checkFuseF901/ rectified device L901/BD901/C901/C902 Check voltage of IC901-8pin check component R904/R932 Check T901(1-3)out-Vcc Check D901/R909/C903 Check IC901-drive out Check/replace IC901 Check MOS-Q901pin(G/D) Check R910/R914/Q901/T901pri...
  • Page 32 Service Manual AOC831S No Backlight of panel Check flow chart for the Check 16V voltage？ Inverter No Backlight Open F801, voltage-16V Return check Power Check ON/OFFsignal After Power off,check Check main board C801/C802 ZD803 ZD804? Q805 Q806 Check IC801 -12pin=12V pinCT waveform? After Power off,check Q808/Q805/R810/C809...

  • Page 33: Factory Mode Osd

    Service Manual AOC831S Key Board--- OSD no working Check flow chart OSD is unstable or not For the key board working Connect Key Pad Board Is Key Pad Board connecting normally? Is Button Switch normally? Replace Button Switch Is Key Pad Board normally? Replace Key Pad Board Check Main Board 9.3 Factory mode adjustment...

  • Page 34: Ddc Re-Wirting Step

    Service Manual AOC831S By select this “F” button to enter Factory OSD Menu. 9.4 Writing DDC program step After replacing the Main board and the Panel, Check if white-balance is within the specs ,then re-writing DDC is necessary. 1. Prepared the PC with Windows XP system, DDC recording device (12V)for figure below 2.
  • Page 35 Service Manual AOC831S...
  • Page 36 Service Manual AOC831S...

  • Page 37: Bom List

    LCD 18.5" STAND ASS'Y 0Q1G 330 6120 SCREW 42A9930001 M03404 Q34G0454AED 1B STAND 2nd source M03404 Q34G0454AED 1B9090 STAND Q37G0101012 HINGE(AOC 831Sw) E750 750GLB185WA311N000 PANEL CLAA185WA03 000 FQ CTOC 2nd source E750 750GLB185WA321N000 PANEL CLAA185WA03 011 FQ CTOC 2nd source E750 750GLC185WA312N000...
  • Page 38 Service Manual AOC831S SMTCRM5A2QQJ MAIN BOARD 040G 45762420A LABEL 25x6mm U401 056G 562702 IC TSUM1PLR-LF LQPF-64 MSTAR U404 056G 563515 IC AZ1117D-3.3TRG1 1A/3.3V TO-252 U404 056G 563916 IC LD1117DT33TR DPAK 2nd source U103 056G 662 13 IC AZC099-04S SOT23-6L U102 056G 662 13 IC AZC099-04S SOT23-6L U402...
  • Page 39 Service Manual AOC831S R120 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R436 061G0402104 RST CHIPR 100 KOHM +-5% 1/16W R410 061G0402121 RST CHIP 120R 1/16W 5% R414 061G0402220 RST CHIPR 22 OHM +-5% 1/16W R105 061G0402222 RST CHIPR 2.2 KOHM +-5% 1/16W R106 061G0402222 RST CHIPR 2.2 KOHM +-5% 1/16W...
  • Page 40 C426 067G 3151014KB EC 100uF M 25V 6.3*11 J07G 1 S132 wooden pallet J11G 800 5 支撑钉 J40G 19T61529B ID LABEL 831S+ J40G 58161511A label 931Swl J41G780061554A Service center list J41G780A615 9B 931SW QSG J44G6000624 6A EMPTY CARTON J44G6000624 7A...
  • Page 41 Service Manual AOC831S LED001 081G 122CT GP LED GP34032C/G307-ZY-60 2nd source SMTKEPC7QF4J KEY BOARD FOR AI R003 061G0603000 RST CHIP MAX 0R05 1/10W R005 061G0603100 1F RST CHIPR 1 KOHM +-1% 1/10W R002 061G0603200 1F RST CHIPR 2 KOHM +-1% 1/10W R004 061G0603200 1F RST CHIPR 2 KOHM +-1% 1/10W...
  • Page 42 Service Manual AOC831S L901 073L 174 40 NG LINE FILTER 30mH 2nd source T801 080GL17T 40 DN X'FMR TK.2001U.101 2nd source T901 080GL19T 26 T X'FMR 610uH SRW24LQL-T15H016 2nd source CN901 087G 501 32 S AC SOCKET CN901 087G 501 32 DL AC SOCKET DIP 3PIN+2PIN GROUND 2nd source BD901...
  • Page 43 Service Manual AOC831S Q805 057G 760 5A DTC 144WN3/S SOT-23 Q802 057G 763 14 AM9945N 2nd source Q809 057G 763511 MOSFET SRK7002LT1G SOT-23 LRC Q802 057G 763525 APM9948K R823 061G0603000 RST CHIP MAX 0R05 1/10W R926 061G0603100 1F RST CHIPR 1 KOHM +-1% 1/10W R942 061G0603100 1F RST CHIPR 1 KOHM +-1% 1/10W...
  • Page 44 Service Manual AOC831S R837 061G0805473 RST CHIPR 47K OHM +-5% 1/8W R810 061G0805510 2F RST CHIPR 51K OHM +-1% 1/8W JR801 061G1206000 RST CHIP MAX 0R05 1/4W F801 061G1206000 4 RST CHIP MAX 0R05 1/4W F905 061G1206000 4 RST CHIP MAX 0R05 1/4W R962 061G1206101 RST CHIPR 100 OHM +-5% 1/4W...
  • Page 45 Service Manual AOC831S C912 065G1206102 72 CAP CHIP 1206 1000PF K 500V X7R D805 093G 6432P LL4148 D806 093G 6432P LL4148 D807 093G 6432P LL4148 D812 093G 6432P LL4148 D814 093G 6432P LL4148 D817 093G 6432P LL4148 D903 093G 6432P LL4148 D915 093G 6432P...
  • Page 46 Service Manual AOC831S J906 095G 90 23 JUMPER WIRE J904 095G 90 23 JUMPER WIRE J903 095G 90 23 JUMPER WIRE J901 095G 90 23 JUMPER WIRE J803 095G 90 23 JUMPER WIRE J802 095G 90 23 JUMPER WIRE J801 095G 90 23 JUMPER WIRE 715G2852 3 4...

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