AOC e2436Vwa Schematic

23.6" LCD Monitor

AOC e2436Vwa

Service

		Horizontal Frequency
		3080kHz
	Table of Contents
Description	Page Description	Page

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

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 8.1.Equipments and Tools Requirement…...............44 8.2.Trouble Shooting…..………...............................45 9. FOS Testing………………………………………49 10.Firmware and DDC Instruction……………….….53 11.White-Balance,Luminance Adjustment…............66 12.Mechanical Instructions …............ ..............68 13.Monitor Exploded View……................................72 14.BOM List…………..……………………….............73

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

Revision List

Version	Release Date	Revision History	TPV Model Name

A00	Sep.-07-2010	Initial release	TD92A8NB6WA1PNE

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.)

1.Monitor Specifications

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.

Monitor Block Diagram

LED Drive	Flat Panel and
	LED backlight


Converter Board	Main Board	DVI-D
		D-SUB

Adapter Board		Key Board		USB Board*2

AC-IN 90~264V		HOST Computer		Video signal, DDC

View and Dimension

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.

*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.

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.

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.

Eco mode

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.

Color Boost

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.

Luminance

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.