AOC E941va Service Manual

Service Manual                                                                             AOCe941Series 
11 
4.4 TFT LCD Module Block Diagram 
 
4.5 LCD module input terminal pin assignment 
 
 

Service Manual                                                                             AOCe941Series 
12 
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 
 
 
 

Service Manual                                                                             AOCe941Series 
13 
5.Block Diagram 
5.1 LCD Block Diagram 
 
 
5.2 MainBoard Block Diagram 
(1)e941VA---715G3737 
 
 
 
Crystal 12MHz 
(X401) Panel Interface 
(CN408/409)
 
Scalar NT68668FG-QFG-128 
  (Include ADC, OSD, MCU) 
(U401) 
D-Sub 
Connector 
(CN101) 
EEPROM  
PM25LD020C 
(U402)
 
H sync
V sync
Key Board 
Control 
(CN401/402) Voltage converter 
5V
5V 3.3V 1.8V
DVI 
Connector 
(CN102) 
DC-AC inverter...

Service Manual                                                                             AOCe941Series 
14 
(2)e941SA---715G3225 
 
5.3 Power Board Block Diagram 
 
Fuse EMI Rectifier Smoothing 
Capacitor Transformer 
T901 
MOS 
Switching IC-PWM 
IC901 
12V 
Rectifie
r 
5V 
Rectifie
r 
12V 
12V 
 
 
5V 
Sense 
resisto
r
Vcc 
Rectifie
r 
regulating
sampling photocoupler 
Vcc 
Converter 
Vo u t30V
CN801 Switching MOS 
Q801-AO4828 
AC input 
100-240V 
CN803 
Current Sense 
LED converter Part 
Power...

Service Manual                                                                             AOCe941Series 
15 
5.4 Software Flow Chart 
 
Star t 
Initial_MCU
Check if DataBuffer Is blank
Check if Sum is chan
ged ?
To Write default values
Read parameter_from Buffer
PowerHandler 
Init_GlobalVariables 
Initial_MCU Device 
while 
InputTiming 
ModeHandler 
MenuHandler 
DebugHandler 
if standby mode? 
Brightness 
Contrast 
Language 
InputType
 InputTimingStableCounter
OsdCounter 
PowerDownCounter 
LED turn-on...

Service Manual                                                                                                                 AOCe941Series 
16 6.
 Circuit Schematic 
6.1 Main Board 1---715G3737-M01   
Audio_EN
DDCSCL1
VC C 3. 3
05. PAN EL I N TER F AC E
05. PAN EL I N TER F AC E
VLC D
PA[ 0. . 9]PB[ 0. . 9]
02. I N PU T
02. D -SU B I N PU T
R0+R0-
SOG_D ET
G0+G0-B0+B0-
+5V
AH S0AVS0
DDCSCL1DDCSDA1
ED I D _W P
VGA_C ABLE_D ET
RX2+
+5V
RX1+RX0-D D CSD A2
Audio_D ET
G0+DDCSCL2B0+RXC+
DVI_CABLE_DET
PS_EN...

Service Manual                                                                                                                 AOCe941Series 
17 
C113
100N F 25V
VGA_5V
G0+
VGA_5V
BI N 0
D 101
BAV70
3
1
2
DDCSDA1
HSIN0
R1262K2 1/ 16W  5%
CN101
DB15162738495
1112131415
10
1716
R119
100R  1/ 16W  5%
R10775R 1/16W 1%
DDCSCL_A
R 109
0R 05 1/ 16W
RIN0
R 103
0R 05 1/ 16W
GI N 0-
B0- 5
C 104
47N16V
BI N 0-
R114 4K7 1/16W 5%
R122 0R05 1/10W
VSI N 0
VGA_C ABLE_DET 5
DDCSCL1
R110
0R05 1/16W
EDI D _WP
DDC SDA1...

Service Manual                                                                                                                 AOCe941Series 
18 DVI-input/DDC 
ESD_DVI
R 140 10R  1/ 16W  5%
RXC- 5
DVI5V
DDCSDA2 5
C119
100N F  25V
U106
AOZ8902C IL123
456
CH1
VN
CH2 CH3VP CH4
DAT0-
DVI5V
RX2- 5
C115
100NF 25VR 139 10R  1/ 16W  5%
ESD _D VI
ZD102
RLZ5.6B
C116
220N16VESD _D VI
D VI _CABLE_DET 5ESD _D VI
SD A_D VI
R 133 22K 1/16W  5%
R 129 100R  1/ 16W  5%
DVI5V
DAT1-
RX0+ 5
SC L_D VI
CN102
JACK...

Service Manual                                                                                                                 AOCe941Series 
19 Power part---5V/3.3V/1.8V 
C715
220N16V
Q707
N C / PMBS3904
+5V
FB701
0 OHM +-5% 1/ 8W
VCC3.3
U703 AP2114H -1. 8TR G1
3
2
14
VI VO
GND
4
R724
NC
TO252
VLCD 6
Q705
AO3401A
R704
10K 1/16W 5%R723
NC /4K7 1/ 16W 5%
R799
10K 1/16W 5%Q702
NC
R701
22K 1/16W 5%
R715
100K 1/ 16W  5%
C706
100N F  25V
C717
NC/ 0.1uF  25V
Q706
2N3904S-RTK/ PS
R711 NC
+C702
100uF 16V
DIM...

Service Manual                                                                                                                 AOCe941Series 
20 Scarlar---Flash/key 
PA2R420 NC /120R  1/ 16W 1%
LVB0M
PB4
R429
10K 1/16W  5%
U SB_EN
CN 401
NC/CONN
2468
1357
R444
10K 1/16W  5%
DVI_HPD 4
G0-
R 423 220K 1/16W  5%
R 412 N CC 431
N C/ 0.1uF  25V
PA7
AH S0
R 417
470R  1/16W  5%
B0+ 3
LVA3P
LED _1
R 409 0R 05 1/16W
LED _1 PB9
C424
1uF  10V
VC C3. 3R414 N C
C 403
100N F  25V
LVB3P PA5
RX1- 4
LVA3M
RXC+
SOG_D ET 3...