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Service Manual AOCe941Series
LCD
Custom AOC
Model e941Series
The manual adaptation models:
AOC e941VA /e941SA /e941S
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Service Manual AOCe941Series
REVISION LIST
Version Release Date Revision History Model TPV Model No
e941VA T995NTNBWVK2PNJ
A00 May-30-2010 Initial Release e941SA T995NSNCWVA1UNJ
e941S T992NSN8WVA1NNJ
T9A2NS2DWVA4QNE
A01 Aug.-26-2010 Add new Models e941S
T9A5NS2DWVA4QNE
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Service Manual AOCe941Series
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 12 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 12 ---------------------------------------------------------------------------------------------------------------- 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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Service Manual AOCe941Series
1. LCD Specifications
1.1 Product Features
Monitor Model AOC e941VA / e941SA * / e941S *
Driving system TFT Color LCD
LCD Panel Active Display Area 408.24mm (W)×255.15mm(H)
Pixel Pitch 0.2835 mm×0.2835mm
R,G,B Analog Interface75ohm,0.7V
Video
DVI digital Interface
Input Separate Sync. H/V TTL
H-Frequency 30kHz--81kHz
V-Frequency 56Hz--75Hz
D-Sub 15pin
Input Connector
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
ON Mode <25W
Power Consumption Power Saving Mode <1W
Switch OFF <0.5W
Power Source 90~264VAC,47~63Hz, 1.5A Max supply current
Operating Temp: 0° to 40°C
Environmental
Storage Temp.: -20° to 60°C
Considerations
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
HORIZONTAL VERTICAL
STANDARD RESOLUTION
FREQUENCY FREQUENCY
640×480 31.469kHz 59.94Hz
VGA 640×350 37.861kHz 72.80Hz
640 × 480 37.50kHz 75.00Hz
640 × 480 31.469kHz 70.087Hz
DOS-mode
720 × 400 31.469kHz 70.087Hz
Mac-mode 832 ×624 49.725kHz 74.50Hz
800 × 600 35.16kHz 56.25Hz
800 × 600 37.879kHz 60.317Hz
SVGA
800 × 600 48.07kHz 72.188Hz
800 × 600 46.875kHz 75Hz
1024 × 768 48.363kHz 60Hz
1024 × 768 56.476kHz 70Hz
XGA
1024 × 768 60kHz 75Hz
1280 × 720 45kHz 60KHz
1280 × 1024 63.981kHz 60Hz
SXGA
1280 × 1024 79.976kHz 75Hz
1440 × 900 55.93kHz 60Hz
WXGA
1440 × 900 70.635kHz 75Hz
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Service Manual AOCe941Series
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.
The power cord should be connected.
Connect the video cable from the video card of PC to the monitor.
Press the power button to turn on the monitor, the power indicator will light up.
2.1 Control Buttons
Control Description
To turn ON/OFF the moniteor, and power indicator
1 Power Button
(Green/Blue and Amber/Orange).
Active main menu while no OSD display,enter next level on
main menu or sub menu status, or enter last level on
2 Menu / Enter adjustment bar..
Hotkey ,exit
Hotkey,Audio volume adjust for VA ,or chang 4:3 or wide
image ratio for SA .
Volume / +
3
4:3 or wide/ + OSD, increase current value of bar, or move to next item of
menu
If there is no OSD,select the ECO mode of brightness and
DCR.
4 ECO mode(DCR)/ -
OSD, it will decrease current value of bar, or it will move to
last item of menu.
If there is no any OSD, select video source(DVI/RGB).
Press hold to 2s , it is auto configuration.
5 Auto / Exit
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
1 5
VGA Connector layout 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
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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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4.4 TFT LCD Module Block Diagram
4.5 LCD module input terminal pin assignment
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4.6 LED Connector
Pin No Signal name
1 LED1
2 LED2
3 LED3
4 LED4
5 VLED(Voltage in)
6 VLED(Voltage in)
7 LED5
8 LED6
9 LED7
10 LED8
4.7 Optical Specifications
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5.Block Diagram
5.1 LCD Block Diagram
Monitor Block Diagram
LED-bar backlight
Panel
LVDS USB
Speaker Memory
3W×2
DC-AC inverter
Main Board
Audio AC-DC(5V/12V)
Amplifiers
USB
HUB
Power Board
Audio in PC- VGA PC- DVI
Key board /DDC /DDC
AC supply
USB cable
90V-264V
From PC
Input signal
5.2 MainBoard Block Diagram
(1)e941VA---715G3737
Crystal 12MHz Panel Interface
(X401) (CN408/409)
Scalar NT68668FG-QFG-128
EEPROM
(Include ADC, OSD, MCU)
PM25LD020C
(U402)
(U401)
5V 3.3V 1.8V
H sync
V sync
Key Board D-Sub DVI
Voltage converter Control Connector Connector
(CN401/402) (CN101) (CN102)
5V
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(2)e941SA---715G3225
Crystal 12MHz Panel Interface
(X401) (CN403/405)
Scalar NT68168FG
EEPROM (Include ADC, OSD, MCU)
PM25LD020C (U401)
(U402)
5V 3.3V 1.8V
H sync
V sync
Key Board D-Sub
Voltage converter Control Connector
(CN401/402) (CN101)
5V
5.3 Power Board Block Diagram
Power/ Converter Board Block Diagram
Fuse EMI Rectifier Smoothing Transformer 12V 12V
Capacitor T901 Rectifier 12V
AC input
100-240V
5V 5V
Rectifier
IC-PWM
Vcc MOS
IC901
Switching
Vcc
CN902-12V
Rectifier
Audio in Amplifier Sense
resistor
regulating
photocoupler sampling
Power adapter Part
12V Converter
Vout30V
PWM Control Switching MOS
CN801 SET CN803
IC801 Q801-AO4828
TA9690
Current Sense
On/off DIM
LED converter Part 1-8
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5.4 Software Flow Chart
Start Software Flow Chart
Initial_MCU
Y
Check if DataBuffer Is blank To Write default values
Check if Sum is changed ?
Brightness
Contrast
Language Read parameter_from Buffer
InputType InputTimingStableCounter
Init_GlobalVariables OsdCounter
PowerDownCounter
Initial_MCU Device
while
PowerHandler
if standby mode?
No signal message InputTiming N
LED turn-on
Show power on logo
UnsupportModeFlag ModeHandler
InputTiming
OSD Menu MenuHandler Phaes/Frequency
Image setup
Color
O i
if factory mode?
Y
Enter factory mode OSD
DebugHandler
END
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6. Circuit Schematic
6.1 Main Board 1---715G3737-M01
04.SCALER
02.INPUT
R0+ VCC3.3
R0+ R0+ VCC3.3
R0-
R0- R0-
SOG_DET VCC1.8
+5V SOG_DET SOG_DET VCC1.8
G0+
+5V G0+ G0+ +5V
G0-
G0- G0- +5V 05.PANEL INTERFACE
B0+
B0+ B0+
B0-
B0- B0-
EDID_WP AHS0
EDID_WP AHS0 AHS0
AVS0
AVS0 AVS0
DDCSDA1 PA[0..9]
DDCSDA1 DDCSDA1 PA[0..9] PA[0..9]
DDCSCL1
DDCSCL1 DDCSCL1
VGA_CABLE_DET
VGA_CABLE_DET VGA_CABLE_DET
02.D-SUB INPUT PB[0..9]
PB[0..9] PB[0..9]
EDID_WP
EDID_WP
VLCD
VLCD
05.PANEL INTERFACE
03.DVI INPUT
RX0+
RX0+ RX0+
RX0-
RX0- RX0-
RX1+
+5V RX1+ RX1+
RX1-
+5V RX1- RX1-
RX2+
RX2+ RX2+
RX2-
RX2- RX2-
RXC+
RXC+ RXC+
EDID_WP RXC-
EDID_WP RXC- RXC- 06.POWER
DDCSCL2 Adj_BACKLIGHT
DDCSCL2 DDCSCL2 Adj_BACKLIGHT on_BACKLIGHT Adj_BACKLIGHT
DDCSDA2
DDCSDA2 DDCSDA2 on_BACKLIGHT Audio_EN on_BACKLIGHT
Audio_EN Audio_DET Audio_EN
DVI_CABLE_DET
DVI_CABLE_DET DVI_CABLE_DET Audio_DET PS_EN Audio_DET +5V
DVI_HPD PS_EN PS_EN +5V
DVI_HPD DVI_HPD Panel_ON VCC3.3
Panel_ON Panel_ON VCC3.3
03.DVI INPUT
VCC1.8
VCC1.8
VLCD
VLCD
04.SCALER 06.POWER
Input part---VGA/DDC
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CN101
DET_VGA R102 100R 1/16W 5% VGA_CABLE_DET
16
VGA_CABLE_DET 5
DB15
10 VGA_5V
DDCSCL1 R101 DDCSCL_A 15 5
5 DDCSCL1
100R 1/16W 5% 9 VGA_5V
VSIN0 14 4
8 BIN0-
HSIN0 13 3 BIN0 R103 R104 R105 C102
7 GIN0- ZD101 BIN0 0R05 1/16W 0R05 1/16W 100R 1/16W 5% 47N16V B0+
B0+ 5
DDCSDA1 R106 DDCSDA_A 12 2 GIN0 RLZ5.6B
5 DDCSDA1
100R 1/16W 5% 6 RIN0-
11 1 RIN0 R107 C103
5PF 50V
75R 1/16W 1%
17
R108 C104
BIN0- 100R 1/16W 5% 47N16V B0-
B0- 5
R142 C120
1N50V
SOG_DET 5
470R 1/16W 5%
R109 R110 R111
+5V VGA_5V GIN0 0R05 1/16W 0R05 1/16W 100R 1/16W 5% C105 47N16V G0+
G0+ 5
4,5,7 +5V
R112 C106
2
1
5PF 50V
75R 1/16W 1%
R113 C107
D101 GIN0- 100R 1/16W 5% 47N16V G0-
4K7 1/16W 5%
4K7 1/16W 5%
22K 1/16W 5%
G0- 5
BAV70
ESD_VGA
3
R117 R118 R119 C108
C101 RIN0 0R05 1/16W 0R05 1/16W 100R 1/16W 5% 47N16V R0+
R0+ 5
U101
AT24C02BN-SH-T 220N16V
R114
R115
R116
8 1 R120 C109
EDID_WP 7 VCC A0 2
4,5 EDID_WP WP A1 3
DDCSCL1 6
5PF 50V
75R 1/16W 1%
DDCSDA1 5 SCL A2 4 R121 C110
SDA VSS RIN0- 100R 1/16W 5% 47N16V R0-
R0- 5
HSIN0 R122 0R05 1/10W R123 100R 1/16W 5%
AHS0 5
VSIN0 R124 100R 1/16W 5%
AVS0 5
R125 R126
C182 C181 C111 C112
U102 ESD_VGA U103 ESD_VGA
VSIN0 1 6DDCSDA_A BIN0 1 6 RIN0
2K2 1/16W 5%
2K2 1/16W 5%
22pF 50V
22pF 50V
NC/22pF 50V
NC/22pF 50V
2 CH1 CH4 5 2 CH1 CH4 5
HSIN0 3 VN VP 4DDCSCL_A DET_VGA 3 VN VP 4 GIN0
CH2 CH3 C113 CH2 CH3 C114
AOZ8902CIL 100NF 25V AOZ8902CIL 100NF 25V
T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL OTS Size B
G3737-M0D-000-0H4K-10-100125 TPV MODEL DUAL Rev D
Key Component D-SUB I/O PCB NAME 715G3737-M0D
<>
Date Monday , January 25, 2010 Sheet 3 of 7
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DVI-input/DDC
R127
DVI_CABLE_DET 5
100R 1/16W 5% +5V DVI5V
CN102