AOC e2436Pa User manual

24" LCD Color Monitor AOC e2436Pa
Service
Service
Service
Horizontal Frequency
30-80 kHz
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.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
R FOR TH
UNIT WHEN S
Table of Contents…………………..…………………..…...1
Revision List.…...................................................……......2
Important Safety Notice.….….............................……......3
1.Monitor Specification..............................………............4
2.LCD Monitor Description……….…………………….......6
3.Operation Instruction.…………...................……...........7
3.1.General Instructions....................................…...........7
3.2.Control Buttons and Connections...............................7
3.3.Adjusting the Picture…...................................9
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..……….........................................36
7.PCB Layout..……….............................................38
7.1.Main Board………..…........................................38
7.2.Power Board….…..............................................39
7.3.Key Board………..…..........................................43
7.4.USB Board………..….........................................43
8.Maintainability………............................................44
8.1.Equipments and Tools Requirement…...............44
8.2.Trouble Shooting…..………...............................45
9.White-Balance,Luminance Adjustment…............49
10.Monitor Exploded View……................................51
11.BOM List…………..………………………............52

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Revision List
Revision
Date
Revision History
Remark
A00
Apr.-15-2012
Initial release
TKBAA86B6WA1DNE

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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

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2. LCD Monitor Description
The LCD monitor will contain a main board, an adapter board, a converter board, two USB boards and a key board
which house the flat panel control logic, brightness control logic and DDC.
The power part will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips each
voltage.
AC-IN
100V-240V
Monitor Block Diagram
Adapter
Flat Panel and
LED backlight
Main Board
RS232 Connector
For white balance
adjustment in factory
mode
LED Drive.
Video signal, DDC
HOST Computer
Converter
USB board*2
Key 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 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.
-Connect the video cable from the monitor to the video card.
-Press the power button to turn on the monitor, the power indicator will light up.
3.2 Control Buttons and Connections
Power
Press to turn on or turn off the monitor.
Source (4 : 3 or wide) / Up
Press ∧key to change the screen aspect ratio between standard 4:3 format or Wide format. When the input
resolution is wide format, the aspect ratio hotkey is disabled. When the main menu or sub-menu is active, the key
∧functions as to select up or increase value.
Source hot key : When the OSD is closed, press ∨button will be Source hot key function (Only for the models with
dual or more inputs) .Press Source button continuously to select the input source showed in the message bar , press
Menu/Enter button to change to the source selected.
Menu / Enter
Press to activate OSD, then press Up or Down to navigate through the functions. Once the desired function is
highlighted, press the Menu button to activate the submenu. In sub-menu, Press Up or Down to navigate through
the functions. Once the desired function is highlighted, press Up or Down button to change the setting. Select Exit
icon then press Menu button to return to superior menu.
Volume(Auto) / Down
When there is no OSD, press the key to activate Volume and auto function, then press Up or Down to select Volume
or Auto configure function. Once the Volume icon is selected, press Menu button to activate it, and press Up or
Down to change the setting, press Menu button for confirmation and exit OSD . Once the Auto icon is selected,
press Menu button to do auto configure and exit OSD . If the product has no speaker built-in, to press the Down key
is to do auto configure directly. When it is DVI or HDMI input, auto configure function is disabled and the auto icon is
gray.

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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.
3. Connect the audio cable to audio in port on the back of the monitor.
4. (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.
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 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. Follow the steps below to activate the adjustment.
1) Press the MENU key to activate the OSD window.
2) Press UP or DOWN to navigate through the functions. Once the desired function is highlighted, press the MENU
key to activate it. If the function selected has a sub-menu, press UP or DOWN again to navigate through the
sub-menu functions. Once the desired function is highlighted, press MENU key to activate it.
3) Press UP or DOWN to change the settings of the selected function. Press MENU key to exit and save, select the
exit function. 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 key while the monitor is off and then press
power button to turn the monitor on. To unlock the OSD, press and hold the MENU key while the monitor is off and
then press power button to turn the monitor on.

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Eco mode

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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.

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Color Boost

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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.

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Luminance

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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.

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Image Setup

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Notes :
When the input source is digital signal like DVI or HDMI, Image Setup can not be adjusted.

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Color Temperature

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Picture Boost