AOC e22m User manual

21.5" Multimedia Function Display AOCe22m
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Service
Service
Service
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
5.2 Power Board…..…………..………….…..…….......18
5.3 Key Board………………………..……..……….......20
5.4 IR Board…………………………..……….…….......21
6.Adjustment...............................................................22
7.Block Diagram.………..............................................23
8.Schematic Diagram………..……..………………......25
8.1 Main Board…………….…………………...….........25
8.2 Power Board………..…....…………...……….........33
8.3 Key Board……………….………….………….........36
8.4 IR Board…………..………………….………..........37
9.Exploded View…………………….………….….......38
10.BOM List……………….…………….…………….....40
Table of Contents........……...................................…........1
Important Safety Notice.......................................……......2
Revision List………………………………………………....3
1. General Specification.................................………........4
2. Operating Instructions…………………….……...….......5
2.1 The Use of Remote Control…….…………...…….......5
2.2 To Use the Menus...……………………….………..........7
3. Input/Output Specification…………....................…....10
3.1 Connectors…………………………………………….10
3.2 Factory Preset Timing…………………………………...11
4. Repair Flow Chart ……………………….…….…….....12
5. PCB Layout ………………..………………....…..........16
5.1 Main Board………………..……………...…..…......16

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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 might 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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Revision List
Note: Check updating contents, please input keywords in the “Find box” of PDF and click “Ok”. After that, it will
automatically locate to the updating contents.
Version Release Date Revision Instructions TPV Model
A00 Sep.21, 2010 Initial Release
JIAAR3NT2X1RDN
JIAAR3NC2XGGDN
JIAAR3NL2X3ADN
A01 Nov.08.2011
Add new model, lead in the
new converter board:
715G4128P01001004S
Update as below:
Block Diagram
Schematic
PCB Layout
JIAAR3NE2XGGDN

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1. General Specification
Model e22m
Panel Size (Diagonal) 546mm (21.5”)
Native Resolution 1920 x1080
Viewing Angle Horizontal:170° / Vertical:160°(Typ.)
Brightness 250cd/m²
Contrast Ratio 20000000:1
Speaker Output 2Wx2
Available Voltage Range AC100~240v 50/60Hz
Power Consumption(Load) ≤35w
Power Consumption(Ldle) ≤1w
Dimension(W×H×D)
(with base and bracket) 551.6 x 456 x220.2mm
Wall-mount Accessories Not included
Wall-mount Dimension 100×100mm
M4×4pcs(screws)
Environmental Requirements
Operating Temperature
Humidity
Storage Temperature
Humidity
0~℃40℃
15% ~ 90%
-20 ~℃60℃
15% ~ 90%

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2. Operating Instructions
2.1 Control Panel and Interface
Side panel
Signal Source: Press button to enter the interface of signal source selections and press again to select the source
needed when menu is unavailable on display. Once menu occur, this key is used for confirmation purpose and
select to confirm target you needed.
Menu: Press to enter or exit the menu.
▲▼: When the menu appears on the screen, use these two buttons to select the desired option.
Volume: With the menu displayed on the screen, press these two buttons to select the desired option. When no
OSD menu is displayed on the screen, the controls will adjust sound volume.
Source Interface
A device with multiple sources can be connected to your monitor. The figure below shows how to connect.
Tip: If you want to wall mount your monitor, all cables must be connected to the monitor connectors first.
Whenever an external device is connected to your monitor, please make sure the monitor is turned off.
When connecting an external device, connect the cable to the connector with the same color.
Video/S-Video Input:

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Connect the Video or S-Video cable to the DVD player, CD player, Video Recorder, or Camcorder, etc.
Audio Input: Connect the audio sources (e.g., computer, DVD player, CD player, Video Recorder, or Camcorder) to
the Audio Input connector.
Tip: Audio is shared between S-Video and Video.
Auxiliary Component Input:
Connect the auxiliary source audio and video (e.g., computer DVD player, CD player, Video Recorder, or
Camcorder) to the Component Input connector.
HDMI Input:
Connect the HDMI source (e.g., computer, DVD player, CD player, Video Recorder, or Camcorder) to the HDMI
Input connector.
PC Signal and PC Audio Input:
Connect the PC to the PC input connector on the back of the monitor with a VGA cable. Also connect the audio
cable between PC Audio Input of the monitor and the PC audio connector.
Earphone Jack:
Earphones can be connected to the Earphone jack.

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2.2 To Use the Menus
1. Press the Menu button to display menu.
2. Select the menu option to be adjusted using the Up or Down key.
3. Enter the submenu by pressing the VOL Up key. Enable or adjust the function selected by pressing the VOL Up
and Down key. The selected option will be highlighted.
4. Press the Menu button again to exit the menu.
Source Menu
Press the Source button to enter the Source Menu: including PC, HDMI, Video, S-Video, Component.
Video Settings
Brightness This adjusts the brightness of the screen backlight. The adjustment range is between 0 and
100.
Contrast This adjusts the screen contrast. The adjustment range is between 0 and 100.
Color Saturation This adjusts the screen color intensity. The adjustment range is between 0 and 100. This
control is not available in PC and Component modes.
Sharpness This adjusts the sharpness of the picture. The adjustment range is between 0 and 100.
Color Temperature:This option provides four color temperature settings: Normal, Warm, Cold, and User Setting.
DNR:This control is not available in PC mode.
Image Mode: This option provides four settings: Soft, Standard, Vivid and User setting.
DCR Enable/disable Dynamic contrast Ratio.
Reset Restore the video settings to factory mode.

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Audio Settings (applicable to all modes)
Sound Quality:Switch between the five audio modes.
Bass:This is used to adjust the bass strength.
Treble:This is used to adjust the treble strength.
Equalizer The sound adjustment range is 0 to 60. During adjustment from 30 to 0, the sound from the right
channel will gradually decrease until it disappears. During adjustment from 30 to 60, the sound
from the left channel will gradually decrease until it disappears.
Reset Restore the audio settings to factory mode.
Function Setting
Menu Language This sets the language used for the OSD. There are 24 available languages including English
and Simplified Chinese.
AspectRatio 4:3
16:9
Movie (This control is not available in PC mode.)
Panorama (This control is not available in PC mode.)
Sleep Timer This sets the interval before your monitor will automatically enter standby mode.
OSD Position This changes the OSD menu display position with 9 options available.
OSD Transparency:This adjusts the transparency of the OSD menu. The adjustment range is between 0 and 100.
Display Time This adjusts the display time (in seconds) of the OSD menu. The adjustment range is between
0 and 60.

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Power Saving Enable/disable Power Saving
Power-On Recall Enable/disable Power-On ;Recall
Reset : Restore function settings to the factory default.
PC Image
(The menu below appears only in PC mode.)
Auto Config Automatic adjustment to the best image position and timing position.
Horizontal Position This adjusts the horizontal position of the screen.
Vertical Position This adjusts the vertical position of the screen.
Clock This eliminates horizontal interfering lines.
Phase,Thiseliminates vertical interfering lines.
Reset Restores function settings to the factory default.

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3. Input/Output Specification
3.1 Connectors
D-sub
Pin No. Description Pin No. Description
1 Red Video 9 ＋5V Power
2 Green Video 10 GND
3 Blue Video 11 N/A
4 N/A 12 DDC-Serial Data
5 DDC-Return 13 H-Sync.
6 Red Ground 14 V-Sync.
7 Green Ground 15 DDC-Serial Clock
8 Blue Ground
HDMI
Pin No. Description Pin No. Description
1 HDMI data 2＋11 HDMI Clock Shield
2 HDMI data 2 Shield 12 HDMI Clock－
3 HDMI data 2－13 CE remote
4 HDMI data 1＋14 N/A
5 HDMI data 1 Shield 15 DDC Clock
6 HDMI data 1－16 DDC Data
7 HDMI data 0＋17 GND
8 HDMI data 0 Shield 18 ＋5V Power
9 HDMI data 0－19 HP DET
10 HDMI Clock＋
Composite Vedio / S-Video AND Component Vedio Connectors
S-Video (Y/C) : Monitor rear side : 4 Pin Mini-DIN female
Composite Video : Monitor rear side : RCA female
Audio Output : Monitor rear side : RCA female (Red/White) (right channel/left channel)
Audio In : Monitor rear side : PhoneJack (Green)
Headphone : Monitor rear side : PhoneJack (Black)

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3.2 Factory Preset Timing
VESA MODES
Horizontal Vertical
Mode Resolution Total
Nominal
Frequency
+/- 1kHz
Sync
Polarity
Nominal
Frequency
+/- 1 Hz
Sync
Polarity
Nominal
Clock
(MHz)
VGA
640x480@60Hz 800x525 31.469 N 59.940 N 25.175
640x480@72Hz 832x520 37.861 N 72.809 N 31.500
640x480@75Hz 840x500 37.500 N 75.00 N 31.500
SVGA
800x600@56Hz 1024x625 35.156 N/P 56.250 N/P 36.000
800x600@60Hz 1056x628 37.879 P 60.317 P 40.000
800x600@72Hz 1040x666 48.077 P 72.188 P 50.000
800x600@75Hz 1056x625 46.875 P 75.000 P 49.500
XGA
1024x768@60Hz 1344x806 48.363 N 60.004 N 65.000
1024x768@70Hz 1328x806 56.476 N 70.069 N 75.000
1024x768@75Hz 1312x800 60.023 P 75.029 P 78.750
SXGA 1280x1024@60Hz 1688x1066 63.981 P 60.020 P 108.000
1280x1024@75Hz 1688x1066 79.976 P 75.025 P 135.000
WXGA+ 1440x900@60Hz 1904x934 55.935 N 59.887 P 106.500
1440x900@60Hz 1600x926 55.469 P 59.901 N 88.750
WSXGA 1680x1050@60Hz 2240x1089 65.290 N 59.954 P 146.250
1680x1050@60Hz 1840x1080 64.674 P 59.883 N 119.000
HD 1920x1080@60Hz 2200x1125 67.500 N 60.000 N 148.500
*** 1280x720@60Hz 1650x750 45.000 P 60.000 P 74.250
1280x960@60HZ 1800x1000 60.000 P 60.000 P 108.000
IBM MODES
DOS 640x350@70Hz 800 x 449 31.469 P 70.087 N 25.175
DOS 720x400@70Hz 900 x 449 31.469 N 70.087 P 28.322
MAC MODES
VGA 640x480@67Hz 864x525 35.000 N 66.667 N 30.240
SVGA 832x624@75Hz 1152x667 49.725 N 74.551 N 57.283
XGA 1024x768@75Hz 1328X804 60.241 N 74.927 N 80.000

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4. Repair Flow Chart
1). No power
OK
NG
No power
Check power cable is
tightened?
Check Power “On/Off”
is “On”?
Re-plug the power cable
Replace main board and check connections
Check the LED
indicate is OK? Check the AC power
Replace the power board and check connections
OK
NG
OK
NG
NG
Turn on the Power “On/Off” switch
Replace key board and check connections
NG

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2). No Video
No Video (Power LED Blue)
Press the power
button is OK?
Check the LVDS/FFC
cable or panel
The end
NG
OK
OK
NG
Replace the main board
Replace the power
board and connection
Replace the LVDS/FFC
cable or panel
NG
The end
Replace the key board
NG
OK
Replace the main
board and connection
OK

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3). DIM
OK
The end
OK
The end
OK
The end
DIM (image overlap, focus or flicker)
Reset in factory mode
Set to the optimal
frequency, select the
recommended fre
q
uenc
y
Pull out signal cable and
check “Self Test Feature
Check” is ok?
Check the signal cable
and the PC
Readjust the phase and pixel
clock in the user mode
Replace the main board
Replace the panel
NG
NG
NG
OK
NG
NG
OK
The end
OK
NG

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4). Color is not optimal
NG
Color is not optimal
Miss color Color shift
Replace the signal cable
Pull out the signal cable
and check the screen
color display is normal?
The end
Replace the signal cable or PC
Reset the factory mode
In the user mode, set the” color
settings” until customer satisfy
Replace the main board
NG
OK
NG
OK
NG

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5. PCB Layout
5.1 Main Board
715G3412 3

17

18
5.2 Power Board
Adapter Board
715G 901 2 15

19
Converter Board
715G3823P01001004L
715G4128P01001004S

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5.3 Key Board
715G3421 2