AOC e2436Vwa Service Manual
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AOC e2436Vwa Service Manual

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23.6" LCD Monitor
Service
Service
Service
Table of Contents....................................................1
Revision List...................................................................2
Important Safety Notice.................................................3
1.Monitor Specification...................................................4
2.LCD Monitor Description.........................................6
3.Operation Instruction.................................................8
3.1.General Instructions..................................................8
3.2.Control Buttons and Connections...............................8
3.3.OSD Setting.............................................................10
4.Input/Output Specification........................................26
4.1.Input Signal Connector..........................................26
4.2.Preset Display Modes................................27
4.3.Panel Specification...........................................27
5.Block Diagram............................................................30
5.1.Main Board.....................................................30
5.2.Power Board..................................................31
6.Schematic..........................................................32
6.1.Main Board.......................................................32
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE
CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

Table of Contents

Page Description
6.2.Power Board....................................................36
7.PCB Layout.........................................................39
7.1.Main Board......................................................39
7.2.Power Board.....................................................40
7.3.Key Board........................................................42
7.4.USB Board.......................................................43
8.Maintainability.....................................................44
8.2.Trouble Shooting.............................................45
9. FOS Testing.............................................49
10.Firmware and DDC Instruction.......................53
12.Mechanical Instructions ............... ..............68
13.Monitor Exploded View......................................72
14.BOM List......................................................73
SAFETY NOTICE
1
AOC e2436Vwa
Horizontal Frequency
30- 80kHz
Page

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Summary of Contents for AOC e2436Vwa

  • Page 1: Table Of Contents

    23.6" LCD Monitor AOC e2436Vwa Service Service Service Horizontal Frequency 30- 80kHz Table of Contents Description Page Description Page Table of Contents…………………..…………………..…...1 6.2.Power Board..……….........36 Revision List.…...........……..2 7.PCB Layout..………..........39 Important Safety Notice.….…......……..3 7.1.Main Board………..…........39 1.Monitor Specification......………....4 7.2.Power Board….…..........40 2.LCD Monitor Description……….……………………..6 7.3.Key Board………..…..........42...

  • Page 2: Revision List

    Revision List Version Release Date Revision History TPV Model Name Initial release TD92A8NB6WA1PNE Sep.-07-2010...

  • Page 3: Important Safety Notice

    Important Safety Notice Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service procedures recommended by AOC and described in this service manual are effective methods of performing service operations. Some of these service operations require the use of tools specially designed for the purpose. The special tools should be used when and as recommended.

  • Page 4: Monitor Specification

    1.Monitor Specifications...

  • Page 6: Lcd Monitor Description

    2.LCD Monitor Description The LCD monitor will contain a main board, an adapter board, a converter board ,a key board and two USB boards.The main board houses the flat panel control logic, brightness control logic and DDC. The adapter board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips each voltage.
  • Page 7 View and Dimension...

  • Page 8: Operation Instruction

    3. Operating Instructions 3.1 General Instructions Press the power button to turn the monitor on or off. The other control knobs are located at front panel of the monitor (See Figure ). By changing these settings, the picture can be adjusted to your personal preferences. * The power cord should be connected.
  • Page 9 1. Power 2. Analog (DB-15 VGA cable) 3.Audio 4.DVI To protect equipment, always turn off the PC and LCD monitor before connecting. 1 Connect the power cable to the AC port on the back of the monitor. 2 Connect one end of the 15-pin D-Sub cable to the back of the monitor and connect the other end to the computer's D-Sub port.

  • Page 10: Osd Setting

    3.3 OSD Setting Basic and simple instruction on the control keys. When you press the MENU button on the front control of your monitor, the On DOWN Screen Display (OSD) Main Controls window will pop up and you can then start making adjustments to your monitor's various features. Use the UP or DOWN keys to make your adjustments.
  • Page 11 Eco mode...
  • Page 12 Notes : When Eco mode is not set as “Standard”, Contrast and Brightness can not be adjusted; When DCR is set as “On”, Contrast, Brightness, Eco mode and Gamma can not be adjusted.
  • Page 13 Color Boost...
  • Page 14 Notes : Full Enhance: Total color saturation is enhanced, suitable for vivid pictures. Natural Skin: Suitable for human portrait. Green Field: Suitable for large area of green. Sky Blue: Suitable for sky or ocean scene. Auto Detect: Suitable for outdoor or garden. Demo: Screen divided into two for comparison purpose.
  • Page 15 Luminance...
  • Page 16 Notes : When Eco mode is not set as “Standard”, Contrast and Brightness can not be adjusted; When DCR is set as “On”, Contrast, Brightness, Eco mode and Gamma can not be adjusted.
  • Page 17 Image Setup...
  • Page 18 Notes : When the input source is digital signal like DVI or HDMI, Image Setup can not be adjusted.
  • Page 19 Color Temperature...
  • Page 21 Picture Boost...
  • Page 22 Notes : One of DCR, Color Boost, and Picture Boost functions is active, the other two function is turned off accordingly.
  • Page 23 Extra Setting...
  • Page 24 Exit...
  • Page 25 LED Indicators Status LED Color Full Power Mode Blue Active-off Mode Orange...

  • Page 26: Input/Output Specification

    4. Input/Output Specification 4.1 Input Signal Connector Analog connector Pin Number 15-Pin Side of the Signal Cable Video-Red Video-Green Video-Blue N.C. Detect Cable GND-R GND-G GND-B Ground N.C. DDC-Serial data H-sync V-sync DDC-Serial clock DVI connector Signal Name Pin No. Signal Name Signal Name TMDS Data 2-...

  • Page 27: Preset Display Modes

    4.2 Preset Display Modes HORIZONTAL VERTICAL STANDARD RESOLUTION FREQUENCY(kHZ) FREQUENCY(Hz) 640×480 @60Hz 31.469 59.940 640×480 @67Hz 35.000 66.667 640×480 @72Hz 37.861 72.809 640×480 @75Hz 37.500 75.000 Dos-mode 720×400 @70Hz 31.469 70.087 SVGA 800×600 @56Hz 35.156 56.250 SVGA 800×600 @60Hz 37.879 60.317 SVGA 800×600 @72Hz...

  • Page 28: Electrical Characteristics

    4.3.3 Electrical Characteristics 1.TFT LCD Module Vcc = 5.0 V, Ta = 25 ± 2℃, fv = 60Hz 2.Back Light Unit(LED matrix is 12S8P) Ta = 25 ± 2℃ Note (1)LED can work normally if the PWM dinming ratio range is from 0% to 100% and the operation current Is 25mA Note (2) PLED = (ILED×8) ×VLED, LED matrix is 12S8P.
  • Page 29 4.3.4 Optical Characteristics Ta = 25 ± 2℃,Ha =50±10 %RH, VCC =7V...

  • Page 30: Block Diagram

    5. Block Diagram 5.1 Main Board Keypad Interface Panel Interface (CN402) (CN301) Flash IC EN25F20 Scaler IC TSUMU58EHL-L Crystal (U402) (Include ADC.OSD.MCU) NXS14.31818 (U401) (X401) EEPROM EEPROM AT24C02BN AT24C02BN (U101) (U102) DDC1-SCL DDC2-SCL DDC1-SDA DDC2-SDA D-Sub Connector DVI Connector (CN101) (CN102)

  • Page 31: Power Board

    5.2 Power Board Adapter AC input Bridge Rectifier Transformer Rectifier EMI filter and Filter (T901) diodes Start Resistor (R904,R905) PWM Control Power Switch Feedback LD7576(IC901) (Q901) Circuit Photocoupler Regulator (IC903) (IC904) Audio CN601(PHONE JACK) Audio Power Amplifier APA2069JITUL CN602 (IC601) Converter Boost Circuit OVP Circuit...

  • Page 32: Schematic

    Victory Electronics Co . , Ltd. ) OEM MODEL NEW R SERIES Size FB110 絬 隔 瓜 絪 腹 G3329-C-2-X-2-090401 TPV MODEL AOC 2236VWA Key Component 2.0.INPUT PCB NAME <称爹> 称爹 300 OHM Wednesday , June 10, 2009 Sheet Date...
  • Page 33 T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL NEW R SERIES Size G3329-C-2-X-2-090401 TPV MODEL 絬 隔 瓜 絪 腹 AOC 2236VWA Key Component 3.0.OUTPUT PCB NAME <称爹> 称爹 Wednesday , June 10, 2009 Sheet Date...
  • Page 34 T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL NEW R SERIES Size G3329-C-2-X-2-090401 TPV MODEL 絬 隔 瓜 絪 腹 AOC 2236VWA Key Component 4.0.POWER PCB NAME <称爹> 称爹 Date Wednesday , June 10, 2009 Sheet...
  • Page 35 100R 1/16W 5% R453 0R 1/16W 5% POWER_KEY # U402 LED_GRN/BLUE LED_ORANGE R430 100R 1/16W 5% R455 2.2K 1/16W 5% 010A Befor AOC ID2007 OSD R418 C431 C432 C433 ZD401 C434 C435 0R05 1/16W R440 10K 1/16W 5% R461 0R 1/16W 5%...

  • Page 36: Power Board

    SOCKET 1000uF25V C931 100N 50V CONN GND2 GND1 HEAT SINK(D906) HEAT SINK(D908) HEAT SINK(Q901) Wire Harness MUTE e2436vwa +5V1 T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size Custom G2824-P0A-010-0010-1-091028 TPV MODEL 絬 隔 瓜 絪 腹...
  • Page 37 1K 1/10W IC with Heat-sink(90G6295-3) Custom T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size e2436vwa G2824-P0A-010-0010-1-091028 TPV MODEL ADPC91603HD1 絬 隔 瓜 絪 腹 Key Component 03.AUDIO PCB NAME 715G2824-P0A-010-0010 ODM MODEL 称爹...
  • Page 38 C809 2.2U16V Iout 20mA 25mA R824 R819 43KOHM +-1% 1/10W 100K 1/10W 5% R804 R842 150K AOC E2436VWA T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size R815 LNPC9D432MHD1 G3918-P0E-000-0040-1-091215 TPV MODEL 絬 隔 瓜 絪 腹...

  • Page 39: Pcb Layout

    7. PCB Layout 7.1 Main Board 715G3329 1 2...

  • Page 40: Power Board

    7.2 Power Board Adapter 715G2824P01010001S...

  • Page 42: Key Board

    Converter 715G3918P03000004C 7.3 Key Board 715G3371 2...

  • Page 43: Usb Board

    7.4 USB Board 715G3501 2 715G2663 2...

  • Page 44: Maintainability

    8. Maintainability 8.1 Equipments and Tools Requirement Voltmeter. Oscilloscope. Pattern Generator. DDC Tool with an IBM Compatible Computer. Alignment Tool. LCD Color Analyzer. Service Manual. User Manual.

  • Page 45: Trouble Shooting

    8.2 Trouble Shooting 1. No Power No power Check power cable is Re-plug the power cable tightened? Check Power “On/Off” Turn on the Power “On/Off” switch is “On”? Check the LED Check the AC power indicate is OK? Replace the converter board Replace main board and check connections Replace key board and check connections...
  • Page 46 2. No Video (Power LED Blue) No Video (Power LED Blue) Press the power Replace the main board button is OK? Replace the converter The end board Replace the main The end board and connection Replace the LVDS/FFC Check the LVDS/FFC cable or panel cable or panel Replace the key board...
  • Page 47 3. DIM DIM (image overlap, focus or flicker) Reset in factory mode The end Set to the optimal The end frequency, select the recommended frequency Readjust the phase and pixel The end clock in the user mode Pull out signal cable and Check the signal cable check “Self Test Feature and the PC...
  • Page 48 4. Color is not optimal Color is not optimal Color shift Miss color Reset the factory mode Replace the signal cable In the user mode, set the” color settings” until customer satisfy The end Pull out the signal cable and check the screen color display is normal? Replace the signal cable or PC Replace the main board...

  • Page 49: Fos Testing

    9. FOS Testing 9.1 Brightness Measurement Max. Brightness>250 cd/㎡(typ). Test conditions: - Center of display - Video input (RGB) = 0,700V for Analog Input - Brightness control is set to max - Contrast control is set to max. Min. brightness measurement: <...
  • Page 50 1. 1920 x 1080 (60 Hz) Cross line 2. Black pattern 1. 1920 x 1080 (60 Hz) 2. Black pattern or White Half line pattern 1. 1920 x 1080 (60 Hz) 2. Black pattern, Red H-Line pattern, Green pattern or Blue pattern.
  • Page 51 1. 1920 x 1080 (60 Hz) 2. Black pattern, Gray scale V-Strip pattern, Red pattern, Green pattern or blue pattern . Abnormal 1. 1920 x 1080 (60 Hz) display 2. Gray scale pattern 1. 1920 x 1080 (60 Hz) Gray defect 2.
  • Page 52 Gray scale 1. 1920 x 1080 (60 Hz) failure 2. Gray scale pattern 1. 1920 x 1080 (60 Hz) Light 2. Black pattern or White leakage pattern 1. 1920 x 1080 (60 Hz) Fuzzy 2. Pane picture video...

  • Page 53: Firmware And Ddc Instruction

    10. Firmware and DDC Instruction 10.1Firmware Instruction(TSUM IC ISP for exemple TSUMO58GDJ) 1. OPERATION CONDITIONS: 1) An i486 (or above) personal computer or compatible. 2) Microsoft operation system Windows XP. 3) “MSTAR ISP Tool V4.5.0.7.7”programs. 4) Printer cable and VGA cable. 5) ISP board (PN: 715GT039-A).
  • Page 54 4 .Program： 1)Run MSTAR ISP Tool V4.5.0.7.7，interface as below: 2) Choose CONFIG icon ,interface as below : Setting as : Port type :LPT1 Speed :50KHZ...
  • Page 55 3)Choose DEVICE，and choice WP Pin pull to high during ISP : 4)Choose CONNECT icon ,and interface show Device type , PC and monitor communications successful, click “OK”.
  • Page 56 5)Click “Read”, show as follow picture, then choose correct software to click “open. PS:For exemple TSUMO58GDJ_LGLM215WF4_20100518_V005_8143.BIN 6 )Then ,as below :...
  • Page 57 7) Show the interface as follows after press the AUTO button 8).Then , press Run icon ,as below,Show Blank OK, Program OK, Verify OK, It’s successfully if interface show PASS.
  • Page 58 9) AC off, wait about one minute, after the elextricity large capacitance of power board release, then AC on, otherwise, the key button and power button cann't work. 5.Check Software Version and auto color and reset: You should check the program code is right in factory mode ;(about the method of enter factory mode ,pls reference the service manual ) 5.1Auto level : 1)Monitor display gray pattern ;...
  • Page 59 10.2 DDC Instruction（For exemple：Philips 201B） General DDC Data Re-programming In case the main EEPROM with Software DDC which store all factory settings were replaced because a defect repaired monitor’ the serial numbers have to be re-programmed. It is advised to re- soldered the main EEPROM with Software DDC from the old board onto the new board if circuit board have been replaced, in this case the DDC data does not need to be re-programmed.
  • Page 60 1. Rename the EDID data to “wa”, “wd”. 2. Put the “wa” and “wd” into a new folder, and then create another new folder named “ddc” (It must be “ddc” instead of other names). Step1: Must put the “ddc” folder and “TPVDDC6.0.exe” into the same folder. Step2: Must copy the folder which contains EDID data and “config”...
  • Page 61 3. Double-click ,and choose the “Analog and DVI”, it will show the picture as follow: 4. Click “LoadFile”, it will show the picture as follow:...
  • Page 62 5. Click “OK”, it will show the picture as follow: 6. Key in the same 14 numbers in the Input SN and Verify SN.
  • Page 63 7. Click “Program”, if it shows the below mistake, please try to write again.
  • Page 64 8. If it shows the below picture, it means the write is successful. Click “ReadBoth”, if the DDC Write is OK, it will show the picture as follow:...
  • Page 65 10. Click “program”, if the 12V connector is not OK, it will show the picture as follow: 11. Click “program”, if the cable connector is not OK, it will show the picture as follow:...

  • Page 66: White-Balance,Luminance Adjustment

    11.White- Balance, Luminance Adjustment Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment. How to setting MEM channel you can reference to chroma 7120 user guide or simple use “SC” key and “NEXT” Key to modify xyY value and use “ID” key to modify the TEXT description Following is the procedure to do white-balance adjust .
  • Page 67 C. Adjust Cool (9300K) color-temperature 1. Switch the Chroma-7120 to RGB-Mode (with press “MODE” button) 2. Switch the MEM. Channel to Channel 9 (with up or down arrow on chroma 7120) 3. The LCD-indicator on chroma 7120 will show x=283±30，y=297±30 4.

  • Page 68: Mechanical Instructions

    12.Mechanical Instructions 1.Put the monitor on the EPE pad. 2.Lay down the monitor, then use cross screwdriver or the expert tools leave off the stand while press the Push area of the back cover. 3.Overturn the monitor and the top towards to us.
  • Page 69 4.Take apart the front frame with hands on the label area. 5.As the center of one side of USB connector, take apart 3 sides and stop. Attention: Do not break off the key pc side, or pull the front frame forcibly, to avoid the keypad peel off. 6.Overturn the monitor, on the USB connector area, one hand press the Panel, and use the other to undrawn the back cover.
  • Page 70 7.Make the notice that the front frame of the key pc side should be separated at last. 8. In turn to take apart the key pc connect PIN (A&B), lamp line (C&D), peel off the aluminum foil (E&F), draw off the FFC pin (G), if there is defect with main pc, need leave of f the six-angle screw (H).
  • Page 71 10. According to the different defective area, take off the screws ABCDE to get the relevant part to maintain. Before take apart the POWER pc should take off the AC iron piece first. 11. Use little screwdriver to peel off the key pc from the front frame when need maintain it.

  • Page 72: Monitor Exploded View

    13. Monitor Exploded Views...

  • Page 73: Bom List

    Q45G 76 28 H PE BAG FOR MANUAL Q45G 76 28V13 PE BAG Q50G 4 10 TIE (Y1900221) Q52G 1185 99 big carton tape for aoc E08907 S89G179T30N522 FFC CABLE 30P 275mm P1.0MM USB9HA3 USB BOARD USBAHA5 USB BOARD 0Q1G1040 10120...
  • Page 74 A37G0108 2 HINGE H01G6006 1 Screw 756GH9CB A2015 MAIN BOARD-CBPC9A8A1H1 SMTCR-U402 100GAMMD003W11 MCU ASS'Y-056G1133129 GND1 009G6005 1 GROUND TERMINAL CN602 033G3802 4 WAFER 2.0MM 4P 040G 45762412B CBPC LABEL IC903 056G 139 7 1 IC EL817MA M-TYPE NR901 061G 58809MEN RST NTCR 8OHM £«£20£¥...
  • Page 75 CN502 088G 351 2B XH USB CONN E09508 095G8014 5DH09 HARNESS 5P(PH)-5P(PLUG) 180MM Q901 057G 667 21 NO-SUGGEST STP10NK70ZFP 0M1G 930 8120 SCREW Q90G6263 6 HEAT SINK D908 093G 60278 DIODE SP1060 ITO-220 SECOS 0M1G 930 8120 SCREW Q90G6263 6 HEAT SINK D906 093G 52 66...
  • Page 76 R904 061G1206822 JT RST CHIPR 8.2 KOHM +-5% 1/4W TZAI YUAN C610 065G060310131J CAP CHIP 0603 100PF J 50V NPO SAMSUNG C611 065G060310131J CAP CHIP 0603 100PF J 50V NPO SAMSUNG C932 065G060310232K CAP CHIP 0603 1000pF K 50V X7R C614 065G060310412K NO-SUGGEST 0603 0.1uF K 16V X7R SAMSUNG...
  • Page 77 R134 061G0402100 RST CHIPR 10 OHM +-5% 1/16W R132 061G0402100 RST CHIPR 10 OHM +-5% 1/16W R131 061G0402100 RST CHIPR 10 OHM +-5% 1/16W R130 061G0402100 RST CHIPR 10 OHM +-5% 1/16W R129 061G0402100 RST CHIPR 10 OHM +-5% 1/16W R128 061G0402100 RST CHIPR 10 OHM +-5% 1/16W...
  • Page 78 R125 061G0402472 RST CHIPR 4.7 KOHM +-5% 1/16W R124 061G0402472 RST CHIPR 4.7 KOHM +-5% 1/16W R123 061G0402472 RST CHIPR 4.7 KOHM +-5% 1/16W R306 061G0402563 RST CHIP 56K 1/16W 5% R139 061G0402682 RST CHIP 6K8 1/16W 5% R116 061G0402750 RST CHIPR 75 OHM +-5% 1/16W R112 061G0402750...
  • Page 79 C111 065G0402473 12 CHIP 0.047uF 16V X7R C110 065G0402473 12 CHIP 0.047uF 16V X7R C108 065G0402473 12 CHIP 0.047uF 16V X7R C106 065G0402473 12 CHIP 0.047uF 16V X7R C102 065G0402473 12 CHIP 0.047uF 16V X7R C113 065G0402509 31 CHIP 5pF 50V NPO C109 065G0402509 31 CHIP 5pF 50V NPO...
  • Page 80 C613 067G 2151014RB EC 100uF M 25V 6.3*11mm C908 067G215R2207KB LOW ESR EC 22uF 50V M 6.3*11mm FB602 071G 55 9 T FERRITE BEAD 3.5*6*0.8-T52 FB901 071G 55 29 FERRITE BEAD F901 084G 56 4 B FUSE 4A 250V F903 084G 56 4 B FUSE 4A 250V F902...
  • Page 81 R840 061G0603109 JT RST CHIP 1R 1/10W 5% TZAI YUAN R839 061G0603109 JT RST CHIP 1R 1/10W 5% TZAI YUAN R838 061G0603109 JT RST CHIP 1R 1/10W 5% TZAI YUAN R837 061G0603109 JT RST CHIP 1R 1/10W 5% TZAI YUAN R836 061G0603109 JT RST CHIP 1R 1/10W 5% TZAI YUAN...

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