AOC e941 Series Manuale utente
ServiceManual AOCe941Series
1
LCD 显示器维修手册
Custom：AOC
Model：e941Series
The manual adaptation models:
AOC e941VA /e941SA /e941S
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REVISION LIST
Version Release Date Revision History Model TPV Model No
A00 May-30-2010 Initial Release
e941VA T995NTNBWVK2PNJ
e941SA T995NSNCWVA1UNJ
e941S T992NSN8WVA1NNJ
A01 Aug.-26-2010 Add new Models e941S T9A2NS2DWVA4QNE
T9A5NS2DWVA4QNE
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CONTENTS
1. LCD Specifications ----------------------------------------------------------------------------------------------------------------- 4
1.1 Product Features ---------------------------------------------------------------------------------------------------------------- 4
1.2 Factory Preset Timing ---------------------------------------------------------------------------------------------------------- 5
2. Operation Instruction-------------------------------------------------------------------------------------------------------------- 6
2.1 Control Button------------------------------------------------------------------------------------------------------------------- 6
2.2 OSD Menu Adjusting ---------------------------------------------------------------------------------------------------------- 7
2.3 OSD Lock Function------------------------------------------------------------------------------------------------------------ 7
3. Interface description ----------------------------------------- --------------------------------------------------------------------- 8
3.1 VGA interface ------------------------------------------------------------------------------------------------------------------- 8
3.2 DVI interface ------------------------------------------------------------------------------------------------------------------ 8
3.2 USB+Audio in port ------------------------------------------------------------------------------------------------------------- 9
4. Panel Feature ----------------------------------------- ----------------------------------------------------------------------------- 10
4.1 General Specifications -------------------------------------------------------------------------------------------------------- 10
4.2 Electrical Absolute Ratings -------------------------------------------------------------------------------------------------- 10
4.3 Electrical Characteristics ----------------------------------------------------------------------------------------------------- 10
4.4LCD Module Block Diagram ------------------------------------------------------------------------------------------------- 11
4.5 LCD module input terminal pin assignment------------------------------------------------------------------------------ 11
4.6 LED Connector ----------------------------------------------------------------------------------------------------------------- 12
4.7 Optical Specifications -------------------------------------------------------------------------------------------------------- 12
5. Block diagram------------------------------------------------------------------------------------------------------------------------------13
5.1 LCD Block diagram --------------------------------------------------------------------------------------------------------------------13
5.2 Main board 1、2 Block diagram ----------------------------------------------------------------------------------------------------13
5.3 Power board Block diagram ---------------------------------------------------------------------------------------------------------14
5.4 LCD software flow chart --------------------------------------------------------------------------------------------------------------15
6. Circuit Schematic ----------------------------------------------------------------------------------------------------------------- 16
6.1 Main board 1 -------------------------------------------------------------------------------------------------------------------- 16
6.2 Main board 2 -------------------------------------------------------------------------------------------------------------------- 22
6.3 Power board--------------------------------------------------------------------------------------------------------------------- 27
6.4 Converter board ---------------------------------------------------------------------------------------------------------------- 28
6.5 Audio part ------------------------------------------------------------------------------------------------------------------------ 29
6.6 Key board ------------------------------------------------------------------------------------------------------------------------ 30
7. Monitor exploded view ---------------------------------------------------------------------------------------------------------- 31
8. PCB Layout ------------------------------------------------------------------------------------------------------------------------- 34
8.1 Main board 1、2---------------------------------------------------------------------------------------------------------------- 34
8.2 Power board--------------------------------------------------------------------------------------------------------------------- 38
8.3 Key board ------------------------------------------------------------------------------------------------------------------------ 39
9. Maintainability ------------------------------------------------------------------------------------------------------------------------- 40
9.1 Maintainability Requirement ------------------------------------------------------------------------------------------------- 40
9.2 Trouble Shooting --------------------------------------------------------------------------------------------------------------- 40
9.3 Factory mode OSD ------------------------------------------------------------------------------------------------------------ 44
9.4 DDC re-wirting step------------------------------------------------------------------------------------------------------------ 45
10. BOM List --------------------------------------------------------------------------------------------------------------------------- 48
10.1 e941VA-T995NTNBWVK2PNJ BOM ------------------------------------------------------------------------------------ 48
10.2 e941SA-T995NSNCWVA1UNJ BOM ----------------------------------------------------------------------------------- 61
10.3 e941S-- T9A2NS2DWVA4QNE BOM ----------------------------------------------------------------------------------- 73
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1. LCD Specifications
1.1 Product Features
Monitor Model AOC e941VA / e941SA * / e941S *
LCD Panel
Driving system TFT Color LCD
Active Display Area 408.24mm (W)×255.15mm(H)
Pixel Pitch 0.2835 mm×0.2835mm
Input
Video
R,G,B Analog Interface，75ohm,0.7V
DVI digital Interface
Separate Sync. H/V TTL
H-Frequency 30kHz—81kHz
V-Frequency 56Hz--75Hz
Input Connector
D-Sub 15pin
DVI 24pin
USB HUB 1 upstream, 1 downstream 2.0
Audio in 3.5mm
Display Colors 16.7M Colors
Dot Clock 136.75MHz
Max. Resolution 1440 x 900@75Hz
Plug & Play VESA DDC2B DDC/CI
Power Consumption
ON Mode <25W
Power Saving Mode <1W
Switch OFF <0.5W
Power Source 90~264VAC,47~63Hz, 1.5A Max supply current
Environmental
Considerations
Operating Temp: 0° to 40°C
Storage Temp.: -20° to 60°C
Operating Humidity : 8% to 80%
Dimensions(including stand) 456.75(W)x375.5(H)x149.8 (D)mm
Weight (N. W.): 3.50kg
Safety FCC B CE mark CCC IEC950CB etc.
* e941SA /e941S no DVI Interface
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1.2 Factory preset modes
STANDARD RESOLUTION HORIZONTAL
FREQUENCY
VERTICAL
FREQUENCY
VGA
640×480 31.469kHz 59.94Hz
640×350 37.861kHz 72.80Hz
640 × 480 37.50kHz 75.00Hz
DOS-mode
640 × 480 31.469kHz 70.087Hz
720 × 400 31.469kHz 70.087Hz
Mac-mode 832 ×624 49.725kHz 74.50Hz
SVGA
800 × 600 35.16kHz 56.25Hz
800 × 600 37.879kHz 60.317Hz
800 × 600 48.07kHz 72.188Hz
800 × 600 46.875kHz 75Hz
XGA
1024 × 768 48.363kHz 60Hz
1024 × 768 56.476kHz 70Hz
1024 × 768 60kHz 75Hz
1280 × 720 45kHz 60KHz
SXGA
1280 × 1024 63.981kHz 60Hz
1280 × 1024 79.976kHz 75Hz
WXGA
1440 × 900 55.93kHz 60Hz
1440 × 900 70.635kHz 75Hz
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2. Operation instruction
Generalization
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.
zThe power cord should be connected.
zConnect the video cable from the video card of PC to the monitor.
zPress the power button to turn on the monitor, the power indicator will light up.
2.1 Control Buttons
Control Description
1 Power Button To turn ON/OFF the moniteor, and power indicator
(Green/Blue and Amber/Orange).
2 Menu / Enter
Active main menu while no OSD display,enter next level on
main menu or sub menu status, or enter last level on
adjustment bar..
Hotkey ,exit
3Volume / +
4:3 or wide/ +
Hotkey,Audio volume adjust for VA ,or chang 4:3 or wide
image ratio for SA .
OSD, increase current value of bar, or move to next item of
menu
4 ECO mode(DCR)/ -
If there is no OSD,select the ECO mode of brightness and
DCR.
OSD, it will decrease current value of bar, or it will move to
last item of menu.
5 Auto / Exit
If there is no any OSD, select video source(DVI/RGB).
Press hold to 2s , it is auto configuration.
Exit current OSD and return to last level.
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2.2 OSD User mode adjustment
a) OSD Menu adjustment steps:
1.Press MENU button to display OSD main menu of as below, Press Left button or Right button may select other
main Menu.
2. Press MENU button to adjust items of each main menu.
3. Press Left button or Right button may select item you wish to enter.
4. Press MENU button to enter, and press Left button or Right button to adjust item you select.
5. Press EXIT button may back previous menu.
6. Repeat steps 2-5 to adjust an additional item, or select the EXIT button to return to previous menu.
2.3 OSD Lock Function
Press “menu” and hold,with turn on “Power”, the OSD menu is locked. Again, the OSD menu is non-locked.
For the OSD menu function ,Please refer to “user manual” .
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3.Interface description
3.1 VGA 15pin Connector
Pin No. Description Pin No. Description
1. Red Input 9. +5VDC
2. Green Input 10. Logic GND
3. Blue Input 11. N/A
4. N/A 12. SDA- DDC-Serial Data
5. Connection detect 13. H Sync
6. Red GND 14. V Sync
7. Green GND 15. SCL- DDC-Serial Clock
8. Blue GND
VGA Connector layout
15
610
11 15
3.2 DVI Connector
Pin No. Description Pin No. Description
1. TMDS Data 2- 13. TMDS Data 3+
2. TMDS Data 2+ 14. +5V Power
3. TMDS Data 2/4 Shied 15. Ground (for +5V)
4. TMDS Data 4- 16. Hot Plug Detect
5. TMDS Data 4+ 17. TMDS Data 0+
6. DDC Clock 18. TMDS Data 0-
7. DDC Data 19. TMDS Data 0/5 Shield
8. N.C. 20. TMDS Data 5-
9. TMDS Data 1- 21. TMDS Data 5+
10. TMDS Data 1+ 22. TMDS Clock Shield
11. TMDS Data 1/3 Shield 23. TMDS Clock+
12. TMDS Data 3- 24. TMDS Clock-
DVI Connector layout
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3.3 USB+ Audio in port
Bottom View
Top View
*This section to e941VA do show that other models will be a slight trade-off.
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4. Panel Feature
The Panel-TPM190A1-MWW3 is a 19 inch wide TFT-LCD module with LED Backlght unit and a 30-pin 2ch –LVDS
interface . This module supports 1400×900 WXGA mode and displays up to 16.7 millions colors.The converter module
for the Backlight Unit is not built in.
4.1 General Specifications
4.2 Electrical Absolute Ratings
Item Symbol Min Typ Max Unit
Power Supply Voltage Vcc -0.3 5 +6 V
LED DC forward current If --- 25 30 mA
LEDamp Current IL 2.0 8 mArms
Lamp Frequency FL 40 80 kHz
4.3 Electrical Characteristics
a) TFT LCD module
b) Backlight unit (LED matrix is 12S8P)
PLED=ILED ×VLED
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