AOC E2041S User manual

20"LCDMonitor AOC e2041S
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Service
Service
Service
Horizontal Frequency
30-60 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.
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 Button…………….…..............……...............6
3.3.OSD Menu…………….…...........................…...........7
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…….....................………….................29
5.1.Main Board…….…………...………………....….......29
5.2.Power Board……………..……………...….......30
6.Schematic…………….......................................31
6.1.Main Board………...........................................31
6.2.Power Board...…….........................................35
6.3.USB Board...……............................................37
6.4.Key Board……………………………….…….. .39
7.PCB Layout..………….......................................40
7.1.Main Board………...........................................40
7.2.Power Board…...............................................43
7.3.USB Board……………....................................48
7.4.Key Board……………………………….…….. .50
8.Maintainability……….........................................51
8.1.Equipments and Tools Requirement...............51
8.2.Trouble Shooting…………..............................52
9.White-Balance, Luminance Adjustment.............56
10.Monitor Exploded View………..…….…............58
11.BOM List…………………………………............60
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 Sep.15, 2010 Initial release
TAA2NW2CWVACQN
TAA2NWNBWVK2QN
TAA2NWNMWVSDQN
TAA2NW6BWVK2QN
A01 Dec.14, 2010 Add New Model TAA2NWNMWVSDQN
A02 May.11,2011 Add New Models
TAA2NW6BWVA1QNE
TAA2NW6EWVA1QNE
TAA2NW6CWVACQNE
TAAGNW6BWVA1QNE
TABGNW6EWVA1NNE

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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 radiations 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
LCD Panel
Model name e2041S
Driving system TFT Color LCD
Viewable Image Size 50.8cm diagonal
Pixel pitch 0.2768mm(H) x 0.2768mm(V)
Video R, G, B Analog lnterface
Separate Sync. H/V TTL
Display Color 16.7M Colors
Dot Clock 108MHz
Resolution
Horizontal scan range 30 kHz - 60 kHz
Horizontal scan Size(Maximum) 442.8mm
Vertical scan range 55Hz - 75 Hz
Vertical scan Size(Maximum) 249.075mm
Optimal preset resolution 1600x900(60 Hz)
Highest preset resolution 1600x900(60 Hz)
Plug & Play VESA DDC2B/CI
Input Connector D-Sub 15pin
Input Video Signal Analog: 0.7Vp-p(standard), 75 OHM, Positive
Power Source 100-240VAC, 50/60Hz
Power Consumption Active < 25W
Standby < 0.1 W
Physical
Characteristics
Connector Type 15-pin Mini D-Sub
Signal Cable Type Detachable
Dimensions & Weight:
Height (with base) 368.0 mm
Width 491.3 mm
Depth 150.0mm
Weight(monitor only) 3.4 kg
Environmental
Temperature: Operating 0° to 40°
Non-Operating -25°Cto 55°C
Humidity Operating 10% to 85% (non-condensing)
Non-Operating 5% to 93% (non-condensing)
Altitude Operating 0~3,658m (0~12,000ft)
Non-Operating 0~12,192m (0~40,000ft)

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2. LCD Monitor Description
The LCD monitor will contain a main board, a power board, a converter board, a key board and two USB boards
which house the flat panel control logic, brightness control logic and DDC.
The power board 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 board
Flat Panel and backlight
Main Board
RS232 Connector
For white balance
adjustment in factory
mode
Video signal, DDC
Key Board
Host Computer
USB Board*2
Converter 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 can be adjusted to your personal preferences.
3.2 Control Buttons
Power
Press the Power button to turn on/off the monitor.
Eco Mode / <
Press the Eco key continuously to select the Eco mode of brightness when there is no OSD (Eco mode hot key
may not be available in all models)
4:3 or wide image ratio / >
When there is no OSD, press hotkey continuously to change 4:3 or wide image ratio. (If the product screens size
is 4:3 or input signaling resolution is wide format; the hot key is disabling to adjust. )
Auto / Exit
When the OSD is closed, presses Auto button will be auto configure hot key function.

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3.3 OSD Menu
1) 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.

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