AOC e2440Va User manual

24" LCD Monitor AOC e2440Va
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Service
Service
Service
Horizontal Frequency
30- 83kHz
Table of Contents
Description Page Description Page
SAFETY NOTICE
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.
Table of Contents…………………..…………………..…...1
Revision List.…...................................................……......2
Important Safety Notice.….….............................……......3
1.Monitor Specification..............................………............4
2.LCD Monitor Description……….…………………….......5
3.Operation Instruction.…………...................……...........6
3.1.General Instructions....................................…...........6
3.2.Control Buttons and Connections...............................6
3.3.OSD Menu…............................................................8
4.Input/Output Specification...............……………….......25
4.1.Input Signal Connector...............………..................25
4.2.Factory Preset Display Modes……..........................26
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
6.2.Power Board..……….........................................37
6.3.Light Sensor Borad……………………………….39
6.4.Key Board…............……....................................40
7.PCB Layout..………..............................................41
7.1.Main Board………..…........................................41
7.2.Power Board….…..............................................42
7.3.Light Sensor Borad…………………………….44
7.4.Key Board………..…..........................................45
8.Maintainability………............................................46
8.1.Equipments and Tools Requirement…...............46
8.2.Trouble Shooting…..………...............................47
9. FOS Testing………………………………………51
10.Firmware and DDC Instruction……………….….55
11.White-Balance,Luminance Adjustment…............73
12.Monitor Exploded View……................................75
13.BOM List…………..……………………….............76
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

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Revision List
Version Release Date Revision History TPV Model Name
A00 Aug.-31-2010 Initial release
TKAANT2BWWA1DNE
TKAANT2BWWA2DNE
A01 Jan.-17-2011 Add new model TKAANT2BWWA3DNE

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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.
It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read in
order to minimize the risk of personal injury to service personnel. The possibility exists that improper service
methods may damage the equipment. It is also important to understand that these CAUTIONS and NOTICES ARE
NOT EXHAUSTIVE. AOC could not possibly know, evaluate and advise the service trade of all conceivable ways in
which service might be done or of the possible hazardous consequences of each way. Consequently, AOC has not
undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not
recommended by AOC must first satisfy himself thoroughly that neither his safety nor the safe operation of the
equipment will be jeopardized by the service method selected.
Hereafter throughout this manual, AOC Company will be referred to as AOC.
WARNING
Use of substitute replacement parts, which do not have the same, specified safety characteristics may create shock,
fire, or other hazards.
Under no circumstances should the original design be modified or altered without written permission from AOC.
AOC assumes no liability, express or implied, arising out of any unauthorized modification of design.
Servicer assumes all liability.
FOR PRODUCTS CONTAINING LASER:
DANGER-Invisible laser radiation when open AVOID DIRECT EXPOSURE TO BEAM.
CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may
result in hazardous radiation exposure.
CAUTION -The use of optical instruments with this product will increase eye hazard.
TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S
REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF
THIS SERVICE MANUAL.
Take care during handling the LCD module with backlight unit
-Must mount the module using mounting holes arranged in four corners.
-Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.
-Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to
the panel.
-Protect the module from the ESD as it may damage the electronic circuit (C-MOS).
-Make certain that treatment person’s body is grounded through wristband.
-Do not leave the module in high temperature and in areas of high humidity for a long time.
-Avoid contact with water as it may a short circuit within the module.
-If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth may
damage the panel.)

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1. Monitor Specifications
Panel
Product name e2440Va
Driving system TFT Color LCD
Viewable Image Size 60.97 cm diagonal
Pixel pitch 0.277 mm(H) x 0.277 mm(V)
Video R, G, B Analog lnterface & Digital Interface
Separate Sync. H/V TTL
Display Color 16.7M Colors
Dot Clock 148.5 MHz
Resolution
Horizontal scan range 30 kHz - 83 kHz
Horizontal scan Size(Maximum) 531.36mm
Vertical scan range 56 Hz - 75 Hz
Vertical scan Size(Maximum) 298.89mm
Optimal preset resolution 1920x1080(60 Hz)
Highest preset resolution 1920x1080(60 Hz)
Plug & Play VESA DDC2B/CI
Input Connector D-Sub 15pin & DVI-D
Input Video Signal Analog: 0.7Vp-p(standard), 75 OHM, Positive & DVI-D Digital
Interface (TMDS)
Power Source 12Vdc,3A
Power Consumption Active < 35W
Standby < 1 W
Off Timer 0~24hours Select timing to turn off the monitor.
Speakers 2W x 2
Physical
Characteristics
Connector Type 15-pin Mini D-Sub & DVI-D
Signal Cable Type Detachable
Dimensions & Weight:
Height (with base) 585.6mm
Width 425.2mm
Depth 190mm
Weight (monitor only) 3.8kg
Environmental
Temperature:
Operating 0° to 40°
Non-Operating -25°to +55°
Humidity:
Operating 10% to 85% (non-condensing)
Non-Operating 5% to 93% (non-condensing)
Altitude:
Operating 0~ 3658m (0~ 12000 ft )
Non-Operating 0~ 12192m (0~ 40000 ft )

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2. LCD Monitor Description
The LCD monitor will contain a main board, a converter board,an adapter board, a light sensor board, an audio
board and a key board which house the flat panel control logic, brightness control logic and DDC.
The converter board will provide DC to DC Inverter voltage to drive the backlight of panel.
AC-IN
100V-240V
Monitor Block Diagram
Converter board
Flat Panel and
LED backlight
Main Board RS232 Connector
For white balance
adjustment in factory
LED Drive.
Video signal, DDC
HOST Computer
Key Board
Adapter board
Light Sensor Board

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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.
By changing these settings, the picture quality can be adjusted to your personal preferences.
3.2 Control Buttons and Connections
e-Sensor hot key.
When there is no OSD,Press ◄continuously to select the e-Sensor mode(e-Sensor mode hot key may not be
available in all models).
e-Sensor:The infrared sensor can detect if user is in front of monitor and adjust monitor brightness automatically to
save power.
When it is on, we can select the detect range [Near,Average,Far] by using hot-key,.
Auto configure hot key
When there is no OSD, press Auto/Source button continuously about 2 second to do auto configure (Only for the
models with dual or more inputs).
Volume adjustment hot key:
When there is no OSD,press Volume(►) to active volume djustment bar,press ◄or ►to adjust volume(Only for the
models with speakers)

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1. DVI
2. Analog (DB-15 VGA cable)
3. Power
4. Audio
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.
3. (Optional – Requires a video card with DVI port) - Connect one end of the DVI cable to the back of the monitor
and connect the other end to the computer’s DVI port.
4. Connect the audio cable to audio in port on the back of the monitor.
5 Turn on your monitor and computer.
If your monitor displays an image, installation is complete. If it does not display an image, please refer
Troubleshooting.

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3.3 OSD Menu
) Press the MENU-button to activate the OSD window.
2) Press ◄or ►to navigate through the functions. Once the desired function is highlighted, press the
MENU-button to activate sub-menu . Once the desired function is highlighted, press MENU-button to activate it.
3) Press ◄or ►to change the settings of the selected function. Press ◄or ►to select another function in
sub-menu . Press AUTO to exit . If you want to adjust any other function, repeat steps 2-3.
4) OSD Lock Function: To lock the OSD, press and hold the MENU button while the monitor is off and then press
power button to turn the monitor on. To un-lock the OSD - press and hold the MENU button while the monitor is off
and then press power button to turn the monitor on.
5）e-Sensor hot key: When there is no OSD,Press ◄continuously to select the e-Sensor mode(e-Sensor mode hot
key may not be available in all models).
Notes:
1) If the product has only one signal input, the item of "Input Select" is disable to adjust.
2) If the product screen size is 4:3 or input signal resolution is wide format, the item of "Image Ratio" is disable to
adjust.
3) One of DCR, Color Boost, and Picture Boost functions is active, the other two function is turned off accordingly.

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Luminance
Press Menu to display MENU
Press (Menu) to display menu.
Press ◄or ►to select (Luminance), and
press to enter.
Press ◄or ►to select submenu, press to
enter, and press ◄or ►to adjust.
Press to exit.

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Brightness 0-100 Backlight Adjustment
Contrast 0-100 Contrast from Digital-register.
Eco mode
Standard Standard Mode
Text Text Mode
Internet Internet Mode
Game Game Mode
Movie Movie Mode
Sports Sports Mode
Gamma
Gamma1 Adjust to Gamma1
Gamma2 Adjust to Gamma 2
Gamma3 Adjust to Gamma 3
DCR On/OFF Enable dynamic contrast ratio

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Image Setup
Press (Menu) to display menu.
Press ◄or ►to select (Image Setup),
and press to enter.
Press ◄or ►to select submenu, press to
enter, and press ◄or ►to adjust.
Press to exit.

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Clock 0-100 Adjust picture Clock to reduce Vertical-Line noise.
Phase 0-100 Adjust Picture Phase to reduce Horizontal-Line noise
H.Position 0-100 Adjust the horizontal position of the picture.
V.Position 0-100 Adjust the vertical position of the picture.

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Color Temperature
Press (Menu) to display menu.
Press ◄or ►to select (Color
Temperature), and press to enter.
Press ◄or ►to select submenu, press to
enter, and press ◄or ►to adjust.
Press to exit.

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Warm 6500K Recall Warm Color Temperature from EEPROM.
Normal 7300K Recall Normal Color Temperature from EEPROM.
Cool 9300K Recall Cool Color Temperature from EEPROM.
sRGB Recall SRGB Color Temperature from EEPROM.
User
Red Red Gain from Digital-register
Green Green Gain Digital-register.
Blue Blue Gain from Digital-register

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Color Boost
Press (Menu) to display menu.
Press ◄or ►to select (Color Boost),
and press to enter.
Press ◄or ►to select submenu, press to
enter, and press ◄or ►to adjust.
Press to exit.

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Full Enhance on or off Disable or Enable Full Enhance Mode
Nature Skin on or off Disable or Enable Nature Skin Mode
Green Field on or off Disable or Enable Green Field Mode
Sky-blue on or off Disable or Enable Sky-blue Mode
AutoDetect on or off Disable or Enable AutoDetect Mode
Demo on or off Disable or Enable Demo

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Picture Boost
Press (Menu) to display MENU.
Press ◄or ►to select (Picture Boost); and
press to enter.
Press ◄or ►to select Bright Frame. Select “on” to
activate Picture Boost.
Press ◄or ►to select submenu, press to
enter, and press ◄or ►to adjust.
Press to exit.

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Frame Size 14-100 Adjust Frame Size
Brightness 0-100 Adjust Frame Brightness
Contrast 0-100 Adjust Frame Contrast
H. position 0-100 Adjust Frame horizontal Position
V.position 0-100 Adjust Frame vertical Position
Bright Frame on or off Disable or Enable Bright Frame

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OSD Setup
Press (Menu) to display menu.
Press ◄or ►to select (OSD Setup),
and press to enter.
Press ◄or ►to select submenu, press to
enter, and press ◄or ►to adjust.
Press to exit.

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OSD Setup
H.Position 0-100 Adjust the horizontal position of OSD
V.Position 0-100 Adjust the vertical position of OSD
Timeout 5-120 Adjust the OSD Timeout
Transparence 0-100 Adjust the transparence of OSD
Language Select the OSD language