Asus VH236H Service Manual
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Asus VH236H Service Manual

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Service Manual
R
LCD Monitor Service Manual
SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED FOR
INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE, AND
SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ASUS. ASUS ASSUMES NO RESPONSIBILITY
OR LIABILITY FOR ANY ERRORS OR INACCURACIES THAT MAY APPEAR IN THIS MANUAL,
Model: ASUS VH236H&VH232H
D
1
ASUS VH236H&VH232H

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  • Page 1 INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE, AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ASUS. ASUS ASSUMES NO RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR INACCURACIES THAT MAY APPEAR IN THIS MANUAL,...

  • Page 2: Table Of Contents

    Service Manual ASUS VH236H&VH232H Index Revision Lists…………………………………................3 Important Safety Notice…………………………………………………………………………………..4 1. Monitor Specification......……….................5 2. Operation Instruction…………………………………………………………………………………..6 2.1. General Instructions......…................6 2.2.Control Button…………….…....……................. 6 2.3.OSD Menu…………….…......…..............8 3. Input/Output Specification....……………................11 3.1. Input Signal Connector....…………................11 3.2. Power Supply Requirements.................... 12 3.3. Factory Preset Display Modes…….................. 13 4.

  • Page 3: Revision Lists

    Service Manual ASUS VH236H&VH232H Revision List Version Release Date Revision History Customer Model TPV Model Name VH236H HDRSACNKXCUSRC Jan,08,2009 Initial release VH232H HDRSA2NTXCUSRP...

  • Page 4: Important Safety Notice

    Service Manual ASUS VH236H&VH232H Important Safety Notice Safety information • Before setting up the monitor, carefully read all the documentation that came with the package. • To prevent fire or shock hazard, never expose the monitor to rain or moisture.

  • Page 5: Monitor Specification

    Service Manual ASUS VH236H&VH232H 1. Monitor Specifications Model VH232H VH236H Panel Size 23”W 23”W True Resolution 1920X1080 1920X1080 ≧300CD/m ≧300CD/m Brightness (Max.) Intrisinc Contrast Ratio ≧1000:1 ≧1000:1 ≧160° (V), ≧160° (H) ≧160° (V), ≧160° (H) Viewing Angle (CR=10) Color Saturation (NTSC) Display Colors 16.7M...

  • Page 6: Operation Instruction

    Service Manual ASUS VH236H&VH232H 2. Operation Instruction 2.1 General Instructions Press the power button to turn the monitor on or off. The other control buttons are located at the front of the panel of the monitor. By changing these settings, the picture can be adjusted to your personal preferences.
  • Page 7 Service Manual ASUS VH236H&VH232H Front View...

  • Page 8: Osd Menu

    Service Manual ASUS VH236H&VH232H 2.3 OSD Menu 2.3.1 How to reconfigure Press the MENU button to activate the OSD menu. Press ▼ and ▲ to navigate through the function. Highlight and activate the desired function by pressing the MENU button. If the function selected has a sub-menu, press ▼...
  • Page 9 Service Manual ASUS VH236H&VH232H 2. Image You can adjust brightness, contrast, sharpness, saturation, position (VGA only), and focus (VGA only) from this main function. • Brightness: the adjusting range is from 0 to 00. is a hotkey to activate this function.
  • Page 10 Service Manual ASUS VH236H&VH232H 4. Input Select In this function, you can select VGA, DVI, and HDMI input source (Only for some models). 5. System Setup Allow you to adjust the system. • Volume: the adjusting range is from 0 to 00.

  • Page 11: Input/Output Specification

    Service Manual ASUS VH236H&VH232H 3. Input/Output Specification 3.1 Input Signal Connector Analog connectors Pin No. Description Pin No. Description Red Video +5V Supply Green Video Logic Ground Blue Video Monitor Ground Monitor Ground DDC-Serial Data DDC-Return H-Sync Red Ground V-Sync...

  • Page 12: Power Supply Requirements

    Service Manual ASUS VH236H&VH232H HDMI Connectors Pin No. Description Pin No. Description TMDS Data2+ TMDS Clock Shield TMDS Data2 Shield TMDS Clock TMDS Data2- TMDS Data1+ Reserved (N.C. on device) TMDS Data1 Shield TMDS Data1- TMDS Data0+ DDC/CEC Ground TMDS Data0 Shield...

  • Page 13: Factory Preset Display Modes

    Service Manual ASUS VH236H&VH232H 3.3 Factory Preset Display Modes VESA Modes, Factory Preset Timings...
  • Page 14 Service Manual ASUS VH236H&VH232H VESA Modes, User Available Timings HDMI Supported Primary Timings Modes not listed in the above tables may not be supported. For optimal resolution, we recommendthatyou choose a mode listed in the above tables...

  • Page 15: Block Diagram

    Service Manual ASUS VH236H&VH232H 4. Block Diagram 4.1 Software Flow Chat...
  • Page 16 Service Manual ASUS VH236H&VH232H MCU initializes. Is the EPROM blank? Program the EPROM by default values. Get the PWM value of brightness from EPROM. Is the power key pressed? Clear all global flags. Are the AUTO and SELECT keys pressed? Enter factory mode.

  • Page 17: Electircal Block Diagram

    Service Manual ASUS VH236H&VH232H 4.2 Electrical Block Diagram 4.2.1 Main Board Crystal 14.318MHZ Panel Interface (X401) (CN403) EEPROM Scalar TSUMO88GDI（VH236H） M24C16 Keypad Interface TSUMU88EDI（VH232H） (U403) (CN401) (Include MCU, ADC, OSD) (U401) Flash Memory EN25F20 (U402) DVI_SCL VGA_SCL HDMI_SCL DVI_SDA VGA_SDA...
  • Page 18 Service Manual ASUS VH236H&VH232H 4.2.2 Inverter/Power Board AC input Bridge Rectifier Transformer Rectifier diodes EMI filter and Filter Start Circuit: R904, R905 CN902 Feedback PWM Control Circuit IC LD7576 ON/OFF Output Transformer MOSFET Circuit ON/OFF Lamp Control Feedback PWM Control...

  • Page 19: Schematic Diagram

    Service Manual ASUS VH236H&VH232H 5. Schematic 5.1 Main Board 715G3221 1 VCC3.3 CN101 +5V_AUD R101 10K 1/16W 5% R102 1K 1/16W 5% Adj_BACKLIGHT 5 ON/OFF VCC3.3 +5V_AUD 8 VCC3.3 R103 CONN 10K 1/16W 5% C101 C102 C104 R104 NC/0.1uF 16V...
  • Page 20 Service Manual ASUS VH236H&VH232H CN404 RED+ R458 56 OHM 1/16W C438 0.047uF U409 RED- FB410 30 OHM ESD_5V GREEN+ R459 56 OHM 1/16W C439 0.047uF VGA_SCL I/O1 I/O4 GREEN- FB411 30 OHM BLUE+ R460 56 OHM 1/16W C440 0.047uF VGA_SDA...
  • Page 21 Service Manual ASUS VH236H&VH232H VCC3.3 VDDP VDDC VDDP VDVI ADC1.8 FB401 VCC3.3 120 OHM C402 C403 C404 C405 C406 C407 C401 10uF/16V 0.1uF 16V 0.1uF 16V 0.1uF 16V 0.1uF 16V 0.1uF 16V 0.1uF 16V 5V_DETECT PA[0..9] VCC3.3 VDVI PA[0..9] RIN0P...
  • Page 22 Service Manual ASUS VH236H&VH232H CONN PA[0..9] PA[0..9] CN403 LVA3P LVA3M LVB0P RXO0+ LVB0M RXO0- LVACKP LVB1P RXO1+ LVB1M RXO1- LVACKM LVB2P RXO2+ LVB2M RXO2- LVA2P LVBCKM RXOC- LVA2M LVB3M RXO3- LVBCKP RXOC+ LVA1P LVA0M RXE0- LVB3P RXO3+ LVA1M LVA0P RXE0+...
  • Page 23 Service Manual ASUS VH236H&VH232H U501 HDMI1_CK- HDMI1_CK- R501 10R 1/16W 5% HCK- CN501 HCK- Line-4 HDMI1_CK+ HDMI1_CK+ R502 10R 1/16W 5% HCK+ HCK+ Line-3 SHELL1 HDMI1_D2+ HDMI1_D0- HDMI1_D0- R503 10R 1/16W 5% HD0- HD0- Line-2 HDMI1_D0+ HDMI1_D0+ R504 10R 1/16W 5%...
  • Page 24 Service Manual ASUS VH236H&VH232H +5V_AUDIO1 FB601 120 OHM U601 C601 C602 PCM1754DBQR 0.1uF 16V 10uF/16V AUSCK R601 22R 1/16W 5% I2S_SCK C603 10uF/16V R602 7K5 1/16W 5% C604 1uF 10V HINL AUSCK VOUTL AUSDO R603 22R 1/16W 5% I2S_SD0 AUSDO...
  • Page 25 Service Manual ASUS VH236H&VH232H 拉 拉 拉 拉 线 线 ， ， ， ， 两 两 边 边 两 两 两 两 两 两 两 两 两 两 拉 拉 拉 拉 线 线 两 两 边 边 两 两...

  • Page 26: Power Board

    Service Manual ASUS VH236H&VH232H 5.2 Power Board 715G2824-2-5 L904 100 OHM 1/4W R918 +16V 100 OHM 1/4W R919 Coil C912 BD901 0.001uF GBU408 100 OHM 1/4W R920 C917 C918 ZD902 TZX18B D906 FB902 80OHM FMX-12SL 470UF M 35V 470UF M 35V...
  • Page 27 Service Manual ASUS VH236H&VH232H R817 +16V 4R7 1/8W 5% Q805 ZD802 R816 ON/OFF RLZ5.6B ZD803 4R7 1/8W 5% RLZ5.6B R803 R804 PT801 CN801 AO4620 5K1 1/8W 5% 5K1 1/8W 5% POWER X'FMR C819 56pF3KV C815 0.1uF CN802 R819 Q806 C802 0.047uF...

  • Page 28: Key Board

    Input-VH222H Power Auto-VH222H Auto-other T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL ASUS VH222 and VH242H Size 絬 隔 瓜 絪 腹 G2900-1-2-X-1-0801016 TPV MODEL KEPC8QU3 Key Component 01.KEY BOARD PCB NAME G2900-D-2 称称...

  • Page 29: Pcb Layout

    Service Manual ASUS VH236H&VH232H 6. PCB Layout 6.1 Main Board...
  • Page 30 Service Manual ASUS VH236H&VH232H...

  • Page 31: Power Board

    Service Manual ASUS VH236H&VH232H 6.2 Power Board...
  • Page 32 Service Manual ASUS VH236H&VH232H...

  • Page 33: Key Board

    Service Manual ASUS VH236H&VH232H 6.3 Key Board 715G2900-1-2...

  • Page 34: Disassemble & Assemble Sop

    Service Manual ASUS VH236H&VH232H 7. Disassemble & Assemble SOP 7.1 Precaution Please read the precautions as follows to prevent any damages to the LCD Monitor and also select the appropriate tools for disassembly and re-assembly. Make sure all power connection is removed. Be sure that the LCD Monitor is in power off status.
  • Page 35 Service Manual ASUS VH236H&VH232H 7.2 Suggest Tools Here are some tools that can be used for the LCD monitor’s service and repair. Philips-head Screwdirver Use a Philips-head screwdriver to fasten/remove the K- or B-typed screws Gloves To protect LCD Panel and your hand C/D Disassembly Tool Use C/D Disassembly Tool to open cosmetic cover and avoid scratch.
  • Page 36 Information in this section is to perform the disassembly procedure of the LCD monitor. Depending on the failures, replace the defective parts accordingly. ASUS VH236H&VH232H LCD monitor consists of various subsystems. This section describes the procedures for LCD monitor disassembly. In addition, the detailed disassembly procedures of individual subsystem will be provided for your service needs.
  • Page 37 Service Manual ASUS VH236H&VH232H Remove 3 screws on the STAND, and then remove STAND. Remove 4screws Dismount HINGE...
  • Page 38 Service Manual ASUS VH236H&VH232H 7.3.2 Main Subsystem Back Cover Use disassembly tool to open 6 latches at the bottom of BACK COVER as below, and open the other latches along the edge of the BACK COVER, then lift dimount BACK COVER.
  • Page 39 Service Manual ASUS VH236H&VH232H Release 2 screws and pull down the MAIN SHIELDIGN. Press to release left and right latches of LVDS CABLE, and then disconnect it. Remove the MAIN SHIELDING away from the LCD PANEL.
  • Page 40 Service Manual ASUS VH236H&VH232H Main Borad Release 6 screws. Release 3 screws on MAIN BOARD. Turn over the MAIN BOARD and disconnect AUDIO BOARD CABLE, KEY BOARD CABLE, and MAIN BD_POWER BD CABLE. KEY BOARD CABLE AUDIO CABLE MAIN BD_POWER BD...
  • Page 41 Service Manual ASUS VH236H&VH232H Press to disconnect FFC CABLE. Power Board Release 3 screws on POWER BOARD and remove POWER BOARD. Speaker Module Pull the SPEAKER CABLE out of the hole and remove SPEAKERS. 7.3.3 Bezel Subsysytem Dismount KEY PAD.
  • Page 42 Information in this section is to perform the assembly procedure of the LCD monitor. ASUS VH236H&VH232H LCD monitor consists of various subsystems. This section describes the procedures for LCD monitor assembly. In addition, the detailed assembly procedures of individual modules will be provided for your service needs.
  • Page 43 Service Manual ASUS VH236H&VH232H Main Board Plug FFC CABLE. Connect AUDIO BOARD CABLE, KEY BOARD CABLE and MAIN BD_POWER BD CABLE with MAIN BOARD. KEY BOARD CABLE MAIN BD_POWER BD AUDIO CABLE CABLE Assemble MAIN BOARD, then tight 3 screws on them.
  • Page 44 Service Manual ASUS VH236H&VH232H Secure 6 srcews. Main Shielding Connect the LVDS CABLE. Assemble the MAIN SHELDING with LCD PANEL. Secure 2 srcews as follow.
  • Page 45 Service Manual ASUS VH236H&VH232H Connect LAMP WIRES. Key Board Place PANEL ASSY on the BEZEL and plug the KEY BOARD CABLE. Install KEY BOARD. Back Cover Assemble BACK COVER, and press down along sides to lock latches. Stand Subsystem Install the HINGE.
  • Page 46 Service Manual ASUS VH236H&VH232H Mount 4 screws. Mount STAND, and then secure 3 screws on STAND. Cover STAND COVER, and then mount BASE under STAND.

  • Page 47: Isp Instruction

    Service Manual ASUS VH236H&VH232H 8. ISP Instruction 8.1 The tool for ISP An i486 (or above) personal computer or compatible. Microsoft operation system Windows 95/98/2000/XP. “ISP_Tool V4.3.4” program Software ISP SN Alignment kits The kit contents: ISP BOARD x1 Printer cablex1 VGA CABLE X1 8.2 Connect the ISP board as follow:...
  • Page 48 Service Manual ASUS VH236H&VH232H a. Double-click ，running the program as follows: b. Click icon, and then click to search the program ” ASUS_VH236H_TSUMU88GDI-1_SECLTM230HT01_090106_V009” and click open:...
  • Page 49 Service Manual ASUS VH236H&VH232H C. Click icon, then click . If it burns successfully, it will show as the follow picture: Note: The burning way of VH236H is the same as VH232H’s.

  • Page 50: Ddc Instruction

    Printer cablex1 c) VGA cable x1 d) Digital cable x1 e) 12V DC power source 9.2 Connect the DDC board Connect to the PC LPT When you write analog EDID, Connect this port to the ASUS VH236H’ VGA port 12V Input...
  • Page 51 Service Manual ASUS VH236H&VH232H 9.3 The process of analog DDC write is as follow: a) Double-click ，appear as follow Figs:...
  • Page 52 Key 12 numbers in the Serial Number Blank, then click “OK”. When appear “Write OK!!!” the analog DDC Write completes. Note: 1) The way of digital DDC write is the same as analog DDC write. 2) The burning way of VH236H is the the same as the VH232H’s.
  • Page 53 Service Manual ASUS VH236H&VH232H VH236H EDID Analog 128 bytes EDID Data (Hex): 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 00 FF FF FF FF FF FF 00 04 69 F2 23 47 2D 0C 00...
  • Page 54 Service Manual ASUS VH236H&VH232H Separate Sync Support: Composite Sync Support: No Sync. on green video supported:No Serration of the Vsync.Pulse is not required. Max. H. Image Size : 52cm. Max. V. Image Size : 29cm. Display Gamma: DPMS Features, Active off: Yes.
  • Page 55 Max. H. rate: 85KHz Max. Pixel Clock: 160MHz Detailed Timing: FC (Monitor Name) 'ASUS VH236H' <-x-Detailed Timing Descriptions-x-> Extension Flag: Checksum: 128 bytes EDID Data (Hex): 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15...
  • Page 56 Service Manual ASUS VH236H&VH232H <---Header---> Header: 00 FF FF FF FF FF FF 00 <-x-Header-x-> <---Vendor/Product Identification---> ID Manufacturer Name: ID Product Code: 23F2 ID Serial Number: 000d69a4 Week of Manufacture: Year of Manufacture: 2008 <-x-Vendor/Product Identification-x-> <---EDID Structure Version/Revision--->...
  • Page 57 Detailed Timing: FF (Monitor SN) '312546879012' Detailed Timing: FD (Monitor limits) Min. V. rate: 55Hz Max. V. rate: 75Hz Min. H. rate: 30KHz Max. H. rate: 85KHz Max. Pixel Clock: 160MHz Detailed Timing: FC (Monitor Name) 'ASUS VH236H' <-x-Detailed Timing Descriptions-x->...
  • Page 58 Service Manual ASUS VH236H&VH232H Extension Flag: Checksum: HDMI 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F --------------------Block 0-------------------- 00| 00 FF FF FF FF FF FF 00 04 69 F2 23 29 E7 04 00...
  • Page 59 Service Manual ASUS VH236H&VH232H <-Color Characteristics:-> Rx: 0.644 Gx: 0.285 Bx: 0.152 Wx: 0.312 Ry: 0.332 Gy: 0.601 By: 0.076 Wy: 0.328 <-Established Timings:-> Established Timings 1:BF 720 x 400 @ 70Hz VGA,IBM 640 x 480 @ 60Hz VGA,IBM 640 x 480 @ 67Hz Apple,Mac II...
  • Page 60 Service Manual ASUS VH236H&VH232H FC (Monitor Name) : ASUS VH236H Extension Flag : 01 Block0 Checksum : 77 ------------------------------------------------------- Block 1: Extended Block Type: CEA 861B Detailed Timing Blocks start at Byte: 22 DTV Underscan NO DTV Basic Audio YES...
  • Page 61 Service Manual ASUS VH236H&VH232H Speaker Allocation: FL/FR <-Detailed Timing Descriptions: -> Detailed Timing Descriptions: 720x480 @ 60Hz H Image Size: 521 mm V Image Size: 293 mm Pixel Clock: 27 Hz Refreshed Mode: Non-Interlaced Detailed Timing Descriptions: 1280x720 @ 60Hz...
  • Page 62 Service Manual ASUS VH236H&VH232H VH232H EDID Analog 128 bytes EDID Data (Hex): 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 00 FF FF FF FF FF FF 00 04 69 F1 23 A7 C3 04 00...
  • Page 63 Service Manual ASUS VH236H&VH232H Separate Sync Support: Composite Sync Support: No Sync. on green video supported:No Serration of the Vsync.Pulse is not required. Max. H. Image Size : 52cm. Max. V. Image Size : 29cm. Display Gamma: DPMS Features, Active off: Yes.
  • Page 64 30KHz Max. H. rate: 85KHz Max. Pixel Clock: 160MHz Detailed Timing: FC (Monitor Name) 'ASUS VH232H' <-x-Detailed Timing Descriptions-x-> Extension Flag: Checksum: Digital 128 bytes EDID Data (Hex): 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15...
  • Page 65 Service Manual ASUS VH236H&VH232H Decoded EDID data <---Header---> Header: 00 FF FF FF FF FF FF 00 <-x-Header-x-> <---Vendor/Product Identification---> ID Manufacturer Name: ID Product Code: 23F1 ID Serial Number: 000386d3 Week of Manufacture: Year of Manufacture: 2008 <-x-Vendor/Product Identification-x->...
  • Page 66 Service Manual ASUS VH236H&VH232H <-x-Color Characteristics-x-> <---Established Timings---> Established Timings 1: BF -720x400 @70Hz VGA,IBM -640x480 @60Hz VGA,IBM -640x480 @67Hz Apple,Mac II -640x480 @72Hz VESA -640x480 @75Hz VESA -800x600 @56Hz VESA -800x600 @60Hz VESA Established Timings 2: EF -800x600 @72Hz VESA...
  • Page 67 Service Manual ASUS VH236H&VH232H Detailed Timing: FC (Monitor Name) 'ASUS VH232H' <-x-Detailed Timing Descriptions-x-> Extension Flag: Checksum: HDMI 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F --------------------Block 0-------------------- 00| 00 FF FF FF FF FF FF 00 04 69 F1 23 32 AF BA 00...
  • Page 68 Service Manual ASUS VH236H&VH232H Max. V. Image Size : 29cm Display Gamma : <-Color Characteristics:-> Rx: 0.644 Gx: 0.285 Bx: 0.152 Wx: 0.312 Ry: 0.332 Gy: 0.601 By: 0.076 Wy: 0.328 <-Established Timings:-> Established Timings 1:BF 720 x 400 @ 70Hz VGA,IBM...
  • Page 69 ASUS VH236H&VH232H Max. V. rate: 75 Hz Min. H. rate: 30 KHz Max. H. rate: 85 KHz Max. P Clock: 160 MHz FC (Monitor Name) : ASUS VH232H Extension Flag : 01 Block0 Checksum : 40 ------------------------------------------------------- Block 1: Extended Block Type: CEA 861B...
  • Page 70 Service Manual ASUS VH236H&VH232H Audio Supported: 48KHz 44KHz 32KHz Audio Bit Rate: 16bit <-Speaker Allocation:-> Speaker Allocation: FL/FR <-Detailed Timing Descriptions: -> Detailed Timing Descriptions: 720x480 @ 60Hz H Image Size: 521 mm V Image Size: 293 mm Pixel Clock: 27 Hz...

  • Page 71: Color/White Balance Adjustment

    Service Manual ASUS VH236H&VH232H 10. Color/White balance 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 “...
  • Page 72 Service Manual ASUS VH236H&VH232H 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 ±20, y = 297 ±20, Y＝170cd/m (typ) 4.

  • Page 73: Trouble Shooting

    Service Manual ASUS VH236H&VH232H 11. Trouble Shooting 11.1 Main Board (1). No Power No power Press power key and look if the picture is normal Please reinsert and make sure the AC of 100-240 is Reinsert or check the Adapter/Inverter section Measure U101 PIN2= 3.3V...
  • Page 74 Service Manual ASUS VH236H&VH232H (2). No Picture No picture Measure U101 PIN2= 3.3V Measure U102 PIN2= 1.8V Replace U101 or U102 X401 oscillate waveforms are normal Replace X401 Check if the sync signal from computer is output and video cable...
  • Page 75 Service Manual ASUS VH236H&VH232H (3). White screen White screen Measure Q103 base X401 oscillate waveform is normal is low level? Replace X401 Check Q103 and Q102 are Check reset circuit of broken or CN101 solder? U401 is normal Check Correspondent Check Correspondent component.
  • Page 76 Service Manual ASUS VH236H&VH232H 11.2 Power/Inverter Board 1.) No power Check L904 = 16V Check AC line volt 110V or 220V Check AC input Check the voltage of C905 (+) Check bridge rectified circuit and F901 circuit Check start voltage for the pin3 of U901...
  • Page 77 Service Manual ASUS VH236H&VH232H 2). W / LED, No Backlight Check L904=16V Check adapter or MB Check ON/OFF signal Check Interface board Check IC801 PIN12=16V Change Q801, Q802 Check IC801 PIN10, 9 have the ou tput of square wave at Change U801 Check Q804, Q809 PIN5, 6, 7, 8 have the output of square wave at short time.
  • Page 78 Service Manual ASUS VH236H&VH232H 11.3 Key Board OSD is unstable or not working Is Key Pad Board connecting normally? Connect Key Pad Board Replace Button Switch Is Button Switch normally? Replace Key Pad Board Is Key Pad Board normally? Check Main Board...

  • Page 79: Exploded View

    Service Manual ASUS VH236H&VH232H 12. Exploded View...

  • Page 80: Bom List

    Service Manual ASUS VH236H&VH232H 13. BOM list VH236H HDRSACNKXCUSRC Location Part No. Description Remark 040G 457834 4A S/N LABEL FOR ID 040G 58160811A GREEN DOT LABEL 040G 581680 1A WARRANTY LABEL 044GH600 1 HANDLE 2 050G 600 4 HANDLE 1...
  • Page 81 Service Manual ASUS VH236H&VH232H A37G0090 2 HINGE E750 750GLS230HT132M0AS PANEL LTM230HT01 A03(003) SZ SEC E750 750GLS230HT142M0AS PANEL LTM230HT01 A04(004) SZ SEC 2nd source 756GQ8CB CA056 MAIN BOARD-CBPCRM9USQ3 SMTCR-U402 100GCMSD000N11 MCU ASS'Y-056G1133129 A15G0563201104 MAINFRAME A33G0487ADJ 1L FUNCTION BUTTON A33G0488BCV 1C POWER BUTTON...
  • Page 82 Service Manual ASUS VH236H&VH232H C103 067G 305221 3T 220UF/16V C626 067G 305221 4T 6T 810 1 LG220UF 25V C625 067G 305221 4T 6T 810 1 LG220UF 25V C111 067G 305470 3T 47UF +-20% 16V C435 067G 305470 3T 47UF +-20% 16V 105 摄氏度...
  • Page 83 Service Manual ASUS VH236H&VH232H Q501 057G 763 62 FET 2N7002K 300MA/60V SOT-23 R636 061G0402000 RST CHIP MAX 0R05 1/16W R615 061G0402000 RST CHIP MAX 0R05 1/16W R613 061G0402000 RST CHIP MAX 0R05 1/16W R520 061G0402000 RST CHIP MAX 0R05 1/16W...
  • Page 84 Service Manual ASUS VH236H&VH232H R463 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R462 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R437 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R436 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R468 061G0402102 RST CHIPR 1 KOHM +-5% 1/16W...
  • Page 85 Service Manual ASUS VH236H&VH232H R426 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R429 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R430 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R431 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R433 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W...
  • Page 86 Service Manual ASUS VH236H&VH232H R517 061G0402472 RST CHIPR 4.7 KOHM +-5% 1/16W R512 061G0402472 RST CHIPR 4.7 KOHM +-5% 1/16W R511 061G0402472 RST CHIPR 4.7 KOHM +-5% 1/16W R482 061G0402472 RST CHIPR 4.7 KOHM +-5% 1/16W R481 061G0402472 RST CHIPR 4.7 KOHM +-5% 1/16W...
  • Page 87 Service Manual ASUS VH236H&VH232H C404 065G0402104 12 CAP CHIP 0402 0.1UF 16V X7R C405 065G0402104 12 CAP CHIP 0402 0.1UF 16V X7R C406 065G0402104 12 CAP CHIP 0402 0.1UF 16V X7R C407 065G0402104 12 CAP CHIP 0402 0.1UF 16V X7R...
  • Page 88 Service Manual ASUS VH236H&VH232H C617 065G0402105 A5 CAP 0402 1UF K 10V X5R C606 065G0402105 A5 CAP 0402 1UF K 10V X5R C604 065G0402105 A5 CAP 0402 1UF K 10V X5R C446 065G0402220 31 CHIP 22PF 50V NPO C447 065G0402220 31...
  • Page 89 Service Manual ASUS VH236H&VH232H CN501 088G 340 19 AN HDMI HEADER 19P +SCREW HOLE D501 093G 64 42 P BAV70 SOT23 BY PAN JIT D413 093G 64 42 P BAV70 SOT23 BY PAN JIT D407 093G 64 42 P BAV70 SOT23 BY PAN JIT...
  • Page 90 Service Manual ASUS VH236H&VH232H R005 061G0603000 RST CHIP MAX 0R05 1/10W R002 061G0603000 RST CHIP MAX 0R05 1/10W R003 061G0603100 1F RST CHIPR 1 KOHM +-1% 1/10W R001 061G0603200 1F RST CHIPR 2 KOHM +-1% 1/10W R004 061G0603200 1F RST CHIPR 2 KOHM +-1% 1/10W...
  • Page 91 Service Manual ASUS VH236H&VH232H C917 067G215B6814RV CAP 105℃ 680UF M 25V 10*20 C804 067G215C1024HV EC 105℃ CAP 1000UF M 25V C918 067G215D6814KV CAP 105℃ 680UF M 25V C917 067G215D6814KV CAP 105℃ 680UF M 25V C908 067G215R2207HB LOW ESR EC 22UF 50V M 6.3*11MM...
  • Page 92 Service Manual ASUS VH236H&VH232H D906 093G 52 66 DIODE FMX-12SL 10A/200V TO-220 0M1G 930 8120 SCREW Q90G6264 5 HEAT SINK IC901 056G 379128 IC LD7576 GS SOP-8 IC801 056G 608 12 IC TA9687GN-A-0-TR SOP-16 Q805 057G 600 61 AM4502C-TI-PF S0-8...
  • Page 93 Service Manual ASUS VH236H&VH232H R943 061G0805471 RST CHIPR 470 OHM +-5% 1/8W R819 061G0805479 RST CHIP 4R7 1/8W 5% R818 061G0805479 RST CHIP 4R7 1/8W 5% R817 061G0805479 RST CHIP 4R7 1/8W 5% R816 061G0805479 RST CHIP 4R7 1/8W 5%...
  • Page 94 Service Manual ASUS VH236H&VH232H C909 065G0805221 31 CAP CHIP 0805 220PF J 50V NPO C806 065G0805225 12 CAP CHIP 0805 2.2UF K 16V X7R C808 065G0805333 32 CHIP 0.033UF 50V C801 065G0805473 32 CHIP 0.047UF 50V X7R C802 065G0805473 32 CHIP 0.047UF 50V X7R...
  • Page 95 Q12G6300 71 VESA PLUG Q23G3178680 1A ASUS LOGO Q40G 23N680 2A RATING LABEL Q40G000268088A TRY ME LABEL Q40G0002680A13 SPLENDID LABEL FOR VH236H FUNCTION LABEL FOR Q40G0002680A16 VH232H/D(VH236H) Q41G780068027B US WARRANTY CARD NON ZBD Q44GD013101 Q44GD013201 Q44GD013680 2A 23 LCD CARTON...
  • Page 96 Service Manual ASUS VH236H&VH232H Location Part No. Description Remark 040G 457834 4A S/N LABEL FOR ID 040G 58160811A GREEN DOT LABEL 040G 581680 1A WARRANTY LABEL 044GH600 1 HANDLE 2 050G 600 4 HANDLE 1 052G 1185 49 ASUS TAPE 73-D024084...
  • Page 97 Service Manual ASUS VH236H&VH232H 756GQ8CB CA053 MAIN BOARD-CBPCRM9USQ2 SMTCR-U402 100GCMSD005N11 MCU ASS'Y-056G1133129 A15G0563201104 MAINFRAME A33G0487ADJ 1L FUNCTION BUTTON A33G0488BCV 1C POWER BUTTON A33G0489 1 1C LENS A34G0892ADJ 1B STAND-B A34G1093ADJA1B 30 BEZEL L23WA-8ASUS3-2 A34G1094ADJ 1B 30 REAR COVER L23WA-8ASUS3-2 A85G0141201...
  • Page 98 Service Manual ASUS VH236H&VH232H C435 067G 305470 3T 47UF +-20% 16V 105 摄氏度 470UF +-20% 16V C615 067G 305471 3T C107 067G215B101 3T CAP 105℃ 100UF M 16V C113 067G215B101 3T CAP 105℃ 100UF M 16V U401 056G 562212 IC TSUMU88EDI-LF-1 PQFP-128...
  • Page 99 Service Manual ASUS VH236H&VH232H R520 061G0402000 RST CHIP MAX 0R05 1/16W R494 061G0402000 RST CHIP MAX 0R05 1/16W R493 061G0402000 RST CHIP MAX 0R05 1/16W R492 061G0402000 RST CHIP MAX 0R05 1/16W R491 061G0402000 RST CHIP MAX 0R05 1/16W R490...
  • Page 100 Service Manual ASUS VH236H&VH232H R468 061G0402102 RST CHIPR 1 KOHM +-5% 1/16W R469 061G0402102 RST CHIPR 1 KOHM +-5% 1/16W R516 061G0402102 RST CHIPR 1 KOHM +-5% 1/16W R522 061G0402102 RST CHIPR 1 KOHM +-5% 1/16W R624 061G0402102 RST CHIPR 1 KOHM +-5% 1/16W...
  • Page 101 Service Manual ASUS VH236H&VH232H R433 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R439 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R449 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R620 061G0402104 RST CHIPR 100 KOHM +-5% 1/16W R622 061G0402104 RST CHIPR 100 KOHM +-5% 1/16W...
  • Page 102 Service Manual ASUS VH236H&VH232H R481 061G0402472 RST CHIPR 4.7 KOHM +-5% 1/16W R471 061G0402472 RST CHIPR 4.7 KOHM +-5% 1/16W R470 061G0402472 RST CHIPR 4.7 KOHM +-5% 1/16W R519 061G0402473 RST CHIPR 47 KOHM +-5% 1/16W R523 061G0402473 RST CHIPR 47 KOHM +-5% 1/16W...
  • Page 103 Service Manual ASUS VH236H&VH232H C409 065G0402104 12 CAP CHIP 0402 0.1UF 16V X7R C410 065G0402104 12 CAP CHIP 0402 0.1UF 16V X7R C628 065G0402104 12 CAP CHIP 0402 0.1UF 16V X7R C616 065G0402104 12 CAP CHIP 0402 0.1UF 16V X7R...
  • Page 104 Service Manual ASUS VH236H&VH232H C447 065G0402220 31 CHIP 22PF 50V NPO C607 065G0402220 31 CHIP 22PF 50V NPO C610 065G0402220 31 CHIP 22PF 50V NPO C609 065G0402220 31 CHIP 22PF 50V NPO C608 065G0402220 31 CHIP 22PF 50V NPO C424 065G0402224A5T MLCC 0402 0.22UF K 10V X...
  • Page 105 Service Manual ASUS VH236H&VH232H ZD503 093G 64 49 SU DIODE ESD EGA 10603V05A1-B INPAQ ZD505 093G 64 49 SU DIODE ESD EGA 10603V05A1-B INPAQ ZD506 093G 64 49 SU DIODE ESD EGA 10603V05A1-B INPAQ D401 093G 6432P LL4148 D402 093G 6432P...
  • Page 106 Service Manual ASUS VH236H&VH232H R003 061G0603100 1F RST CHIPR 1 KOHM +-1% 1/10W R001 061G0603200 1F RST CHIPR 2 KOHM +-1% 1/10W R004 061G0603200 1F RST CHIPR 2 KOHM +-1% 1/10W C003 065G0603104 37 CHIP 0.1UF 50V/Y5V C005 065G0603104 37 CHIP 0.1UF 50V/Y5V...
  • Page 107 Service Manual ASUS VH236H&VH232H L905 073G 253 91 L CHOKE BY LI TA L904 073G 253 91 L CHOKE BY LI TA L903 073G 253 91 L CHOKE BY LI TA L901 073L 174 26T1G LINE FILTER 27MH T901 080GL22T 3 N1...
  • Page 108 Service Manual ASUS VH236H&VH232H R843 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R844 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R845 061G0603103 RST CHIPR 10 KOHM +-5% 1/10W R813 061G0603104 RST CHIPR 100 KOHM +-5% 1/10W R809 061G0603105 RST CHIPR 1M OHM +-5% 1/10W...
  • Page 109 Service Manual ASUS VH236H&VH232H R920 061G1206101 RST CHIPR 100 OHM +-5% 1/4W R919 061G1206101 RST CHIPR 100 OHM +-5% 1/4W R918 061G1206101 RST CHIPR 100 OHM +-5% 1/4W R902 061G1206105 1M 1206 R901 061G1206105 1M 1206 R912 061G1206221 RST CHIPR 220 OHM +-5% 1/4W...
  • Page 110 OIL FOR DISAPPEAR ASS'Y Q40G 23N680 1A RATING LABEL Q40G000268088A TRY ME LABEL Q40G0002680A09 SPLENDID LABEL FOR VH232H Q40G0002680A16 FUNCTION LABEL FOR VH232H/D(VH236H) Q41G780068029B TW WARRANTY CARD ZBD Q44GD013101 Q44GD013201 Q44GD013680 1A 23 LCD CARTON Q45G 76 28V13 PE BAG...
  • Page 111 Service Manual ASUS VH236H&VH232H 045G 76 28 RN PE BAG FOR MANUAL E08904 089G 17356G554 AUDIO CABLE E08904 089G 17356X554 AUDIO CABLE 2nd source Q41G2008680 1A VH236/VH232/VH202 QSG Q70G2008680 1A VH236/VH232/VH202 CD MANUAL 040G 58162435A P/N LABEL FOR MANUAL PE BAG...

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