AOC E941va Service Manual
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Service Manual AOCe941Series 1 LCD显示器维修手册 Custom： AOC Model： e941Series The manual adaptation models: AOC e941VA /e941SA /e941S
Service Manual AOCe941Series
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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
Service Manual AOCe941Series
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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
4.4 LCD 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
Service Manual AOCe941Series 4 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
Service Manual AOCe941Series 5 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
Service Manual AOCe941Series 6 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. z The power cord should be connected. z Connect the video cable from the video card of PC to the monitor. z Press 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 3 Vo l u m e / + 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.
Service Manual AOCe941Series 7 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” .
Service Manual AOCe941Series 8 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 6 10 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
Service Manual AOCe941Series 9 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.
Service Manual AOCe941Series
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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