Asus VS239H User manual
Service Manual ASUS VS239H
1
LCD Monitor Service Manual
Model: ASUS VS239H
D
SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED FOR
INFORMATION USE ONLY, AND ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE, AND
SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ASUS. ASUS ASSUMENS NO
RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR INACCURACIES THAT MAY APPEAR IN THIS
MANUAL, INCLUDING THE PRODUCT AND SOFTWARE DESCRIBED IN IT.
Service Manual ASUS VS239H
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Index
Revision Lists………………………………….............................................................................. 3
Important Safety Notice................................................................................................................4
1. Monitor Specifications ..............................................................................................................6
2. Operation Instruction................................................................................................................8
2.1 General Instructions ...........................................................................................................8
2.2 Control Button ....................................................................................................................8
2.3 OSD Menu........................................................................................................................10
3. Input/Output Specification…………………….......................................................................... 14
3.1 Input Signal Connector .....................................................................................................14
3.2 Power Supply Requirements ............................................................................................15
3.3 Factory Preset Display Modes..........................................................................................16
4. Block Diagram........................................................................................................................ 17
4.1 Main Board .......................................................................................................................17
4.2 Power Board.....................................................................................................................18
5. Schematic ..............................................................................................................................19
5.1 Main Board .......................................................................................................................19
5.2 Power Board...……...................................................................................................... 25
5.3 Key Board...…….......................................................................................................... 27
6. PCB layout .............................................................................................................................28
6.1 Main Board .......................................................................................................................28
6.2 Power Board.....................................................................................................................31
6.3 Key Board.........................................................................................................................32
7. Disassemble & Assemble SOP.……………….. ............................................................... …..33
8. ISP Instruction........................................................................................................................42
9. DDC Instruction......................................................................................................................52
10. Color/White Balance Adjustment..........................................................................................58
11. Trouble Shooting ..................................................................................................................60
12. Exploded View .....................................................................................................................64
13. BOM List ..............................................................................................................................66
Service Manual ASUS VS239H
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Revision Lists
Version Release Date Revision History Customer Model TPV Model Name
A00 Jul.12.2011 Initial release VS239H
HDBGAP2BACU1HC
HDBGAP2EACU1HC
Service Manual ASUS VS239H
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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.
Never try to open the monitor cabinet. The dangerous high voltages inside the monitor may result in serious
physical injury.
If the power supply is broken, do not try to fix it by yourself. Contact a qualified service technician or your retailer.
Before using the product, make sure all cables are correctly connected and the power cables are not damaged. If
you detect any damage, contact your dealer immediately.
Slots and openings on the back or top of the cabinet are provided for ventilation. Do not block these slots. Never
place this product near or over a radiator or heat source unless proper ventilation is provided.
The monitor should be operated only from the type of power source indicated on the label. If you are not sure of
the type of power supply to your home, consult your dealer or local power company.
Use the appropriate power plug which complies with your local power standard.
Do not overload power strips and extension cords. Overloading can result in fire or electric shock.
Avoid dust, humidity, and temperature extremes. Do not place the monitor in any area where it may become wet.
Place the monitor on a stable surface.
Unplug the unit during a lightning storm or if it will not be used for a long period of time. This will protect the
monitor from damage due to power surges.
Never push objects or spill liquid of any kind into the slots on the monitor cabinet.
To ensure satisfactory operation, use the monitor only with UL listed computers which have appropriate
configured receptacles marked between 100-240V AC.
If you encounter technical problems with the monitor, contact a qualified service technician or your retailer.
Care & Cleaning
Before you lift or reposition your monitor, it is better to disconnect the cables and power cord. Follow the correct
lifting techniques when positioning the monitor. When lifting or carrying the monitor, grasp the edges of the
monitor. Do not lift the display by the stand or the cord.
Cleaning. Turn your monitor off and unplug the power cord. Clean the monitor surface with a lint-free,
non-abrasive cloth. Stubborn stains may be removed with a cloth dampened with mild cleaner.
Avoid using a cleaner containing alcohol or acetone. Use a cleaner intended for use with the LCD. Never spray
cleaner directly on the screen, as it may drip inside the monitor and cause an electric shock.
The following symptoms are normal with the monitor
The screen may flicker during the initial use due to the nature of the fluorescent light. Turn off the Power Switch
and turn it on again to make sure that the flicker disappears.
You may find slightly uneven brightness on the screen depending on the desktop pattern you use.
When the same image is display for hours, an afterimage of the previous screen may remain after switching the
image. The screen will recover slowly or you can turn off the Power Switch for hours.
When the screen becomes black or flashes, or cannot work anymore, contact your dealer or service center to fix
it. Do not repair the screen by yourself!
Service Manual ASUS VS239H
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Conventions used in this guide
WARNING: Information to prevent injury to yourself when trying to complete a task.
CAUTION: Information to prevent damage to the components when trying to complete a task.
IMPORTANT: Information that you MUST follow to complete a task.
NOTE: Tips and additional information to aid in completing a task.
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1. Monitor Specifications
Model VS239H
Panel Size 23”W (58.4 cm)
Max. Resolution 1920 x 1080 (FHD)
Backlight Tech. LED Backlight Technology
Brightness (Typ.) 250cd/m2
Intrinsic Contrast Ratio (Typ.) 1000:1
Viewing Angle (CR=10) ≧178°(H) / ≧178°(V)
Display Colors 16.7M
Response Time 14ms
Earphone Output Yes
Sound from HDMI Yes
HDMI input (HDMI 1.3) Yes
DVI Input Yes
D-Sub Input Yes
Power ON Consumption Compliant with Energy Star 5.0
Power Saving Mode < 1W
Power OFF Mode < 1W
Tilt -5° ~ +20°
VESA Wall Mounting Yes (100mm x 100mm)
Phys. Dimension (WxHxD) 552 x 400 x 200 mm
Box Dimension (WxHxD) 608 x 460 x 130 mm
Net Weight (Esti.) 3.5 kg
Gross Weight (Esti.) 5.9 kg
Voltage Rating AC 100~240V(Built-in)
Temperature
Operating 0°C - +35°C
Storage -20°C - +60°C
Humidity
Operating 10% - 80%
Storage 5% - 90%
Altitude
Operating 12,000 feet (3,658m)
Storage 40,000 feet (12,192m)
Service Manual ASUS VS239H
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Dimension of Monitor
Dimension VS239H
with stand 552.00(W)x 400.30(H) x 199.89(D) (mm)
without stand 552.00(W)x 334.14(H) x 45.00(D) (mm)
Service Manual ASUS VS239H
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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.
2.2 Control Button
Front View
1. Button：
Automatically adjust the image to its optimized position, clock and phase by long pressing this
button for 2-4 seconds (for VGA mode only).
Use this hotkey to switch among six video preset modes (Scenery, Standard, Theater, Game, Night
View, and sRGB Mode) with SPLENDIDTM Video Enhancement Technology.
Exit the OSD menu or go back to the previous menu as the OSD menu is active.
2. Button:
Press this button to decrease the value of the function selected or move to the next function.
This is a hotkey to activate the QuickFit function designed for alignment.
The QuickFit function contains 7 pages of common grid patterns, paper sizes, and photo sizes.
(Please refer to QuickFit Function).
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3. MENU Button:
Press this button to enter the OSD menu.
Press this button to enter/select the icon (function) highlighted while the OSD is activated.
4. Button:
Press this button to increase the value of the function selected or move right/up to the next function.
This is also a hotkey for Brightness adjustment.
5. Input Select Button
This button is available for model VS229H/VS239H only.
Use this hotkey to switch among VGA, DVI, or HDMI inputs.
6. Power button/ Power Indicator
Press this button to turn the monitor on/off.
The color definition of the power indicator is as the table below.
Rear View
1. AC-In
2. HDMI-In (Available for model VS229H, VS239H only)
3. DVI-In (Available for model VS229N/H, VS239N/H only)
4. VGA-In
5. Earphone-Out (Available for model VS229H, VS239H only)
Service Manual ASUS VS239H
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2.3 OSD Menu
2.3.1 How to reconfigure
1. Press the [MENU] button to activate the OSD menu.
2. Press and to navigate through the functions. Highlight and activate the desired function by pressing the
[MENU] button. If the function selected has a sub-menu, press and again to navigate through the
sub-menu functions. Highlight and activate the desired sub-menu function by pressing the [MENU] button.
3. Press and to change the settings of the selected function.
4. To exit the OSD menu, press the button. Repeat step 2 and step 3 to adjust any other function.
2.3.2 OSD Function Introduction
1. Splendid
This function contains six sub-functions that you can select for your preference. Each mode has the Reset selection,
allowing you to maintain your setting or return to the preset mode.
Scenery Mode: This is the best choice for scenery photo displaying with SPLENDID™ Video Enhancement.
Standard Mode: This is the best choice for document editing with SPLENDID™ Video Enhancement.
Theater Mode: This is the best choice for movie watching with SPLENDID™ Video Enhancement.
Game Mode: This is the best choice for game playing with SPLENDID™ Video Enhancement.
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