AOC T942we Schematic
18.5″&21.5″&24″ TV Monitor AOC T942we&T2242we&T2442e
Service
Service
Service
Description Page Description Page
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….....………………….…..…….......6
2.3 How to Connect……..……………….…….……….....13
2.4 Front Panel Control Knobs…….………….……….....16
3. Input/Output Specification…………....................…....18
4. Mechanical Instructions…………………….................22
5. Repair Flow Chart ……………………….…….…….....29
6. PCB Layout ………………..…………………....….......36
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS
TABLE OF CONTENTS
6.1 Main Board…………..……………...…….…….......36
6.2 Power Board………………..…….…….……….......40
6.3 Key Board………………………..……..……….......46
6.4 IR Board………………………….……..……….......46
7. Adjustment……..………………………….................47
8. Block Diagram.…….................................................48
9. Schematic Diagram…..…………....………………...50
9.1 Main Board…………………………………...….......50
9.2 Power Board…………..….….……...………….......70
9.3 Key Board……………….……….…………….........74
9.4 IR Board……...………….……….…………….........75
10. Exploded View………………………………….…...76
11. BOM List……………….………………….………….79
SAFETY NOTICE
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
1
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.)
2
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
A00 Aug.2,2010 Initial Release T2242We V2AAAANSX4K66N
A01 Oct.15,2010 Add new customer model T942We V1BAAANSX4K73N
A02 Dec.9,2010 Add new customer model T2442e V24AAANCX4ACNN
A03 Dec.15,2010 Add new model T2242We V2AAAANCX4ADNN
Add new models,
lead in the new power board[PCB
P/N: 715G3977P04000004L]
A04 Dec.28,2010
A05 Jan.18,2011 Add new models
Update as below:
PCB Layout
Schematic
BOM
Customer
Model
T2242We V2AAAANCX41GNN
T2442e V24AAANCX41GNN
T2242WE V2AAAANCX4PUNN
T2442e V24AAANCX4PUNN
TPV Model
A06 Mar.01,2011 Add the new model T942We V1BAAANSX4K83N
V2AAAANCX4ACNN
T2242WE
A07 May.13,2011 Add new model
T2442e V24AAANCX4A2NN
T2442E V24AAANAX4UNNN
A08 Dec.13,2011 Add new models
T2442E V24AAANCX4GGNN
V2AAAANEX4GGNN
3
1. General Specification
Model T942we T2242we T2442e
Panel size 470mm (18.5”) 546mm (21.5”)
Resolution 1366 x 768 1920 x 1080
View Angle
Brightness 250cd/m² 250cd/m² 250cd/m²
Dynamic Contrast Ration 20,000,000:1 20,000,000:1 20,000,000:1
Speaker 3Wx2 3Wx2 5Wx2
Video System PAL M/N,NTSC M PAL M/N,NTSC M PAL DK/BG/I
Audio System M,N M,N DK/BG/I
Antenna impedance 75Ω 75Ω 75Ω
Input Voltage AC100-240V 50/60Hz AC100-240V 50/60Hz 220V 50/60Hz
Power consumption ≤35W ≤42W ≤45W
Horizontal 170°
Vertical 160°(Typ.)
Horizontal 170°
Vertical 160°(Typ.)
609mm (24”)
1920 x 1080
Horizontal 170°
Vertical 160°(Typ.)
Standby power
consumption
Size（W x H x D）
(with base and stand) (mm)
Wall mount accessory Option Option Option
Mall mount size
Equipment:
Operation Temperature
Operation Humidity
Storage Temperature
Storage Humidity
≤1W ≤1W ≤1W
458 x 367 x 179.4 521x401.5x179.4 581.4 x 435.6 x 194.4
75 x75mm
M4x4 pcs (Screw)
0ºC~40ºC
20~70%
-20ºC~60ºC
5~95%
75 x75mm
M4x4 pcs (Screw)
0ºC~40ºC
20~70%
-20ºC~60ºC
5~95%
100 x 100mm
M4 x 4 pcs (Screw)
0ºC~35ºC
20~80%
-20ºC~50ºC
10~90%
4
2. Operating Instructions
2.1 The Use of Remote Control
Button Description
POWER:
0~9/100
Digit
buttons
DISPLAY
MUTE
CH +/-
VOL+/-
Source
MENU
WIDE
AUDIO
ADJ
VIDEO
ADJ
PC/HDMI
TV
VIDEO
COMP
Up
Down
Left
Right
OK
CC
PREV CH
–
MTS/SAP
Press to turn on/off the TV. The TV is never completely powered off unless it
is physically unplugged. To select a TV channel.
To select a TV channel.
Press this button to display channel number on the left top corner In all
source and display source on the left top corner in the other source
Temporarily interrupt the sound or restore it.
Press CH+ to switch to next channel
Press CH- to switch to last channel
Press + or -to adjust the volume.
Switch your input source(PC/HDMI/AV/S-Video/YPbPr/TV)
Press repeatedly to display OSD menu.
4:3 / 16:9 (non-Linear) / Movie / Panorama
Switch Zoom the video & audio will mute less then 2 sec.
Press this key to select Audio Scenario mode(include Standard, Club,
Dance, Live & Pop)
Switch picture mode(Vivid / Standard / Mild / User)
Select your input source to HDMI or PC
Select your input source to TV source
Select your input source to AV/S-Video source
Select your input source to Component video
Press this key to shift up in the OSD menu
In all source, equal CH+ key
Press this key to shift down in the OSD menu
In all source, equal CH- key
Press this key to shift left in the OSD menu
In all source, equal VOL- key
Press this key to shift right in the OSD menu
In all source, equal VOL+ key
Equal to enter
Closed captioning function
Return last channel
When you skip channel, press this key to replace decimal or centesimal
number
Press this key to activate Multi-channel Television Sound (include Stereo,
Sap and Mono sound)
5
2.2 To Use the Menus
Using TV Features
6
Parental Control Description
7
Picture Settings Descriptions
8
Audio Settings Descriptions
9
Tune Settings Descriptions
10
PC Image Settings Descriptions
11
Setup Settings Descriptions
12
2.3 How to Connect
Connecting TV
13
14
15
2.4 Front Panel Control Knobs
16
17
3. Input/Output Specification
3.1 RGB Signal Input
15 - Pin Color Display Signal Cable
Pin No. Description Pin No. Description
1 Red 9 +5V (Supply from PC)
2 Green 10 Sync Ground
3 Blue 11 NC
4 NC 12 Bi-directional data(SDA)
5 Ground 13 H-Sync.
6 Red Ground 14 V-Sync.
7 Green Ground 15 Data clock(SCL)
8 Blue Ground
3.2 HDMI Digital Connector Pin Assignments
Pin No. Description Pin No. Description
1 TMDS Data2+ 2 TMDS Data2 Shield
3 TMDS Data2- 4 TMDS Data1+
5 TMDS Data1 Shield 6 TMDS Data1-
7 TMDS Data0+ 8 TMDS Data0 Shield
9 TMDS Data0- 10 TMDS Clock+
11 TMDS Clock Shield 12 TMDS Clock-
13 CEC 14 Reserved (N.C. on device)
15 SCL 16 SDA
17 DDC/CEC Ground 18 +5V Power
19 Hot Plug Detect
18
3.3 Compatible Mode Table
T942We
Resolution
DOS 640x350/70 25.18 31.47 70.09 449 p / n
DOS 720x400/70 28.32 31.47 70.09 449 n / p
DMT 4:3 640x480/60 25.18 31.47 59.94 525 n / n
MAC 640x480/67 30.24 35.00 66.67 525 n / n
DMT 4:3 640x480/72 31.50 37.86 72.81 520 n / n
DMT 4:3 640x480/75 31.50 37.50 75.00 500 n / n
DMT 4:3 640x480/85 36.00 43.27 85.01 509 n / n
DMT 4:3 800x600/56 36.00 35.16 56.25 625 p / p
DMT 4:3 800x600/60 40.00 37.88 60.32 628 p / p
DMT 4:3 800x600/72 50.00 48.08 72.19 666 p / p
DMT 4:3 800x600/75 49.50 46.88 75.00 625 p / p
DMT 4:3 800x600/85 56.25 53.67 85.06 631 p / p
MAC 832x624/75 57.28 47.73 74.55 667 n / n
WVGA 1024X600/60
DMT 4:3 1024x768/60 65.00 48.36 60.00 806 n / n
DMT 4:3 1024x768/70 75.00 56.48 70.07 806 n / n
DMT 4:3 1024x768/75 78.75 60.02 75.03 800 p / p
IBM 1024x768/76 83.10 61.10 76.00 803 p / p
DMT 1024x768/85 94.50 68.68 85.00 808 p / p
1152x864/60 79.90 54.00 60.00 900 p / p
1152x864/70 94.50 63.90 70.00 912 p / p
DMT 1152x864/75 108.00 67.50 75.00 900 p / p
MAC 1152x870/75 100.00 68.68 75.06 915 n / n
SUN 1152x900/66 92.94 61.80 65.95 937 p / p
SUN 1152x900/76 105.56 71.71 76.05 943 p / p
CVT 16:9 1280x720/60 74.50 44.77 59.86 748 n / p
CVT 16:9 1280x720/75 95.75 56.46 74.78 755 n / p
CVT 16:9 1280x720/85 110.25 64.40 84.85 759 n / p
CVT 15:9 1280x768/60 79.50 47.78 59.87 798 n / p
CVT 15:9 1280x768/75 102.25 60.29 74.89 805 n / p
CVT 15:9 1280x768/85 117.50 68.63 84.84 809 n / p
CVT 1280x800/60 83.50 49.70 59.81 831 n / p
CVT 1280x800/75 106.50 62.80 74.93 838 n / p
CVT 1280x800/85 122.50 71.55 84.88 843 n / p
DMT 4:3 1280x960/60 108.00 60.00 60.00 1000 p / p
CVT 4:3 1280x960/75 130.00 75.23 74.86 1005 n / p
DMT 4:3 1280x960/85 148.50 85.94 85.00 1011 p / p
DMT 5:4 1280x1024/60 108.00 63.89 60.02 1066 p / p
SUN 5:4 1280x1024/66 117.00 71.70 67.00 1067 p / p
DOS 5:4 1280x1024/72 130.22 76.00 72.00 1064 p / p
DMT 5:4 1280x1024/75 135.00 79.98 75.03 1066 p / p
SUN 5:4 1280x1024/76 138.01 81.10 76.00 1066 n / n
DMT 5:4 1280x1024/85 157.50 91.15 85.02 1072 p / p
DMT 16:9 1360x768/60 85.50 47.71 60.02 795 p / p
Pixel Rate
( MHz )
Horizontal
( KHz )
Vertical
( Hz )
V_Total
( Line )
Polarity
( H / V )
19
CVT 16:9 1360x768/75 109.00 60.29 74.89 805 n / p
CVT 16:9 1366x768/60 85.50 47.71 59.79 798 p / p
CVT 1440x900/60_RB 88.75 55.47 59.90 926 p / n
CVT 1440x900/60 106.50 55.94 59.89 934 n / p
CVT
VDMTREV
DMT 4:3 1600x1200/60 162.00 75.00 60.00 1250 p / p
CVT 16:10 1680x1050/60_RB 119.00 64.67 59.88 1080 p / n
CVT 16:10 1680x1050/60 146.25 65.29 59.95 1089 n / p
CVT 16:9 1920x1080/60_RB 138.50 66.59 59.93 1111 p / n
CVT 16:10 1920x1200/60_RB 154.00 74.04 59.95 1235 p / n
CVT 16:9 1920x1080/60_RB 148.50 67.50 60.00 0 p / p
1440x900/75 136.75 70.64 74.98 942 n / p
1440x900/85 157.00 80.43 84.84 948 n / p
1600x900/60
1600x1000/60
108.00 60.00 60.00
T2242We
Standard Resolution
VGA 640×480 @60Hz DMT 31.469 59.940
VGA 640×480 @67Hz MAC 35.000 66.667
VGA 640×480 @72Hz DMT 37.861 72.809
VGA 640×480 @75Hz DMT 37.500 75.000
Dos-mode 720×400 @70Hz DOS 31.469 70.087
SVGA 800×600 @56Hz DMT 35.156 56.250
SVGA 800×600 @60Hz DMT 37.879 60.317
SVGA 800×600 @72Hz DMT 48.077 72.188
SVGA 800×600 @75Hz DMT 46.875 75.000
SVGA 832×624 @75Hz 49.725 74.500
XGA 1024×768 @60Hz DMT 48.363 60.004
XGA 1024×768 @70Hz DMT 56.476 70.069
XGA 1024×768 @75Hz DMT 60.023 75.029
XGA 1024×768 @75Hz MAC 60.241 74.927
*** 1152×864 @75Hz DMT 67.500 75.000
*** 1280×960 @60Hz DMT 60.000 60.000
SXGA 1280×1024 @60Hz DMT 63.981 60.02
SXGA 1280×1024 @75Hz DMT 79.976 75.025
WXGA+ 1440×900 @60Hz CVT16:10 55.935 59.887
WXGA+ 1440×900 @60Hz RB CVT16:10 55.469 59.901
WSXGA 1680X1050 @60Hz CVT16:10 65.290 59.954
WSXGA 1680X1050 @60Hz RB CVT16:10 64.674 59.883
HD 1920×1080@60Hz 67.500 60.000
SD 480P@60Hz for SDTV Digital only 31.469 59.94
SD 576P@50Hz for SDTV Digital only 31.250 50.000
HD 720P@60Hz for HDTV Digital only 45.000 60.000
HD 720P@50Hz for HDTV Digital only 37.500 50.000
HD 1080i@60Hz for HDTV Digital only 33.750 60.000
HD 1080i@50Hz for HDTV Digital only 28.125 50.000
HD 1080P@60Hz for HDTV Digital only 67.500 60.000
HD 1080P@50Hz for HDTV Digital only 56.250 50.000
Horizontal
Frequency (kHz)
Vertical Frequency
(Hz)
20
T2442e
PC Input Signal Reference Table
After connecting the PC to the TV with the VGA port, set the PC output signal according to the table below.
Default PC mode
Standard Resolution H. Sync. (kHz) V. Sync. (kHz)
VESA 640 x 480 31.469 59.940
VESA 800 x 600 37.879 60.317
VESA 1024 x 768 48.363 60.004
VESA 1360 x 768 47.720 59.799
WXGA+ 1400 x 900 59.887 55.935
WSXGA 1680 x 1050 59.884 64.674
FHD 1920 x 1080 60.000 67.500
HDMI Input Signal Reference Table
When connecting the PC to this TV with HDMI, set the PC output signal according to the table below.
Default HDMI mode
Standard Resolution H. Sync. (kHz) V. Sync. (kHz)
VESA 640 x 480 31.469 59.940
VESA 800 x 600 37.879 60.317
VESA 1024 x 768 48.363 60.004
VESA 1360 x 768 47.720 59.799
WXGA+ 1400 x 900 59.887 55.935
WSXGA 1680 x 1050 59.884 64.674
FHD 1920 x 1080 60.000 67.500
Video Input Signal Reference Table
1. After connecting video equipment to this TV with component video or HDMI, set the output signals of the video
equipment according to the table below.
2. If the graphic card of the PC supports video out, you can also set the PC output signals according to the table
below.
Default Component Video or HDMI mode
Standard Resolution H. Sync. (kHz) V. Sync. (kHz)
SD 720 x 480i 15.734 60
SD 720 x 480P 31.500 60
SD 720 x 576i 15.625 50
SD 720 x 576P 31.250 50
HD 1280 x 720P 37.500 50
HD 1280 x 720P 45.000 60
HD 1920 x 1080i 28.125 50
HD 1920 x 1080i 33.750 60
FHD 1920 x 1080P 56.300 50
FHD 1920 x 1080P 67.500 60
Video Components Supporting TV, Video and S-video
PAL D/K B/G I; NTSC M/N.
HD Interface
You can also play back traditional programs with a DVD player or VCR player by connecting these video
components to the TV from the video or S-video terminals on the side of the TV.
21
4. Mechanical Instructions
Note: Maybe there are some differences for the below pictures with actual TV, pls base the actual TV, and
below pictures are only for your reference.
1. Unscrew the 4 screws to remove the STAND and BASE.
T942We/ T2442e
T2242We
22
2. Unscrew the 10 screws to remove REAR COVER.
T942We/ T2442e
T2242We
23
3. Disconnect the connectors , unscrew the 5 screws to remove IR BOARD and separate MAIN FRAME and BEZEL.
T942We
T2242We
24
T2442e
4. Unscrew the 2 screws to separate panel and main frame.
5. Unscrew the screws to remove MAIN BOARD and POWER BOARD.
T942We
.
25
T2242We
T2442e
6. The PANEL and MAIN FRAME.
T942We
26
T2242We
27
T2442e
7. Remove the KEY BOARD and SPEAKERS.
28
p
5. Repair Flow Chart
No power
No power (LED “Off”)
Check the AC input and
the
ower is “ON”?
Yes
Power board output=5V?
Yes
Check the IR board and LED
Replace the IR board
No
Replace the main board
No
Power “On”
No
Replace the power board
29
Can’t start
Can’t start（LED red）
Power board output＝16V?
Yes
Check the power key is under control?
No
Check the IR receiver is normal?
No
Replace the power board
Yes
Replace the key board
Yes
Replace the IR board
No
Replace the main board
No
Replace the Power board
30
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