Acer AL1951 Service Manual page 49

VCPU
U404 MAX810STR
3 2
VCC RST
Reset
Circuit
C435
0.22uF
8 AUDIO_SD
8 AUDIO_MU
VCPU
R433
120 1/16W
R437
LED_B 1 Q401
4.7K 1/16W PMBS3906
LED_GRN LED_ORANGE
D402
BAV99
VCPU
C451
1000pF
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3 VCPU
D401 R411
LL4148-GS08 10K
VCPU
R413 10K
R416 10K
U403
1 8
A0 VCC
2 7 R418
A1 WP
3 6
A2 SCL
4 5
GND SDA
AT24C16N-10SC-2.7 R421 NC
Standby
R426 10K 1/16W
Mute
R429 10K 1/16W
C437 C438
4
4
0.1uF 0.1uF
VCPU
R434
120 1/16W
R438
Q402 1 LED_O
PMBS3906 4.7K 1/16W
DP1
D403
DUAL LED BAV99
C452
1000pF
R409 C444 C431
10K 1/16W 0.1uF
10K 1/16W
C432 22pF
U402
X402 35
EA/VP
21
XTAL1
C433 20MHz
+
10uF/16V
20
XTAL2
C434 22pF
10
RESET
12
P4.3
14
5 INT
INT0/P3.2
1/16W 15
INT1/P3.3
33
ALE/P
32
PSEN
1/16W R414 100 1/16W 2
P1.0
1/16W R417 100 1/16W 3
P1.1
4
P1.2
5
P1.3
100 1/16W 6
P1.4
7
P1.5
8
P1.6
9
P1.7
R423 10K 1/16W W78E65P-40
R425 10K 1/16W
ST_DET1
ST_DET2
ENTER
R430 470 1/16W
RIGHT R431 470 1/16W
AUTO
R432 470 1/16W
LEFT
R435 470 1/16W
POWER R436 470 1/16W
D404
BAV99
C443
0.001uF
VCPU
RP401 RP402
10K 1/16W 10K
43
P0.0
42
P0.1
41
P0.2
40
P0.3
39
P0.4
38
P0.5
37
P0.6
36
P0.7
24
P2.0
25
P2.1
26
P2.2
27
P2.3
28
P2.4
29
P2.5
30 R412 10K 1/16W
P2.6
31 R415 10K 1/16W
P2.7
16
T0/P3.4
17
T1/P3.5
18
P3.6/WR
19
P3.7/RD
13 R419 NC
P3.1/TXD
11 R420 NC
P3.0/RXD
R422 100 1/16W
R424 100 1/16W
D405 D406 D407
BAV99 BAV99 BAV99
C442 C441 C440
0.001uF 0.001uF 0.001uF
49
1/16W
POWER
ENTER
RIGHT
LEFT
AUTO
LED_O
LED_B
R410 100 1/1
R427 R428
C436
0.1uF
NC 10K 1/16W
KEY_M
KEY_R
KEY_A
KEY_L
KEY_O
D408
BAV99
V
C439
0.001uF