AOC LCD Monitor P/N : 41A50-144 Service Manual page 79

MCU Block
HDATA0
MFB7
MFB8
+5V
MFB9
HCLK
HFS
BKLT-PWM
C313 D301
22 uF 1N4148
RST
RXD
TXD
R313
IRQ
MFB2
SDA
10 K
SCL
RST1
/VGA_CON
GND
C303
33 pF
GND
+A5V
R300 R301 U300
10 K 10 K 8
VCC
C300
SDA 5
SI
0.1 uF
7
WP
1
A0
SCL 6 2
SCK A1
3
A2
4
VSS
24LC04B
GND
8XC51/PLCC
U302
2
T2/P1.0 P2.0/A8
3
T2EX/P1.1 P2.1/A9
4
P1.2 P2.2/A10
5
P1.3 P2.3/A11
6
P1.4 P2.4/A12
7
P1.5 P2.5/A13
8
P1.6 P2.6/A14
9
P1.7 P2.7/A15
RST
10
RST PSEN
ALE/PROG
11
RXD/P3.0
13
TXD/P3.1 P0.7/AD7
14
INT0/P3.2 P0.6/AD6
15
INT1/P3.3 P0.5/AD5
16
TO/P3.4 P0.4/AD4
17
T1/P3.5 P0.3/AD3
18
WR/P3.6 P0.2/AD2
19
RD/P3.7 P0.1/AD1
P0.0/AD0
R340
20
XTAL2
VCC
X300 R341 0
EA/VP
21
XTAL1
TEST(OP)
20MHz
C306
33 pF
R303
10 K(OP)
wp
3
2
JP303
1
R315 MMBT3904
/BKLT-ON
10 K
GND
+5V
R431
10 K(OP)
(Panel-Select)*
24
25
26
27
28
29 /BKLT-ON R321 R323 R325
30
31 0 (OP) 0 (OP) 0 (OP)
32
33
GND
WP
36
KEY1(ORANGE?)
37
KEY2(GREEN?)
38
KEY3(AUTO)
39
40 KEY4(ENTER)
KEY5(RIGHT)
41
KEY6(LEFT)
42
KEY7(POWER)
43
+A5V
44
35
C305 C304
100uF 0.1 uF
+12V
+5V
C944 C403
R311 0.1 uF 100uF
CN303
10 K
1
GND
2
3
4
Q304
5
+5V HEADER 5
4.7K(OP)
GND
GND VR501 R401 R402
10 K
0(OP) C401 1K(OP)
100uF(OP)
GND
GND
2
K/E Select
R319
1
1
2
KEY
2
GND +5V
R328 R329
10 K 10 K
CN302
1
2
3
4
5
6
7
8
9
HEADER 9
CP301 CP302
1000 pF 1000 pF
GND
+5V
R403
BKLT-PWM
AOC (Top Victory) Electronics Co., Ltd.
Title
MICRO CONTROLLER
Size Document Number
B
Date: Tuesday, July 10, 2001
Rev
715A820-1 B
3 6
Sheet of