MiTAC 8050QMA Service Manual page 131

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8.10 Audio Test Error-2 (Audio In)
No sound from speaker after audio driver is installed.
+3VS
U17
+5VS
RT9167-47CB
5
1
VIN
OUT
2
GND
P
19
4
3
ADJ
CE
C364
0.01µ
ACSDIN0
P
11
U709
ACBITCLK
South Bridge
SPK_OFF
ICH6-M
To next page
D31
BAV70LT1
SBSPKR
2
3
1
R337
47K
KBC_DEEP
P
23
From U13
1
R205
A
0
P
U715
CARDSPK
2
18
B
R338
47K
PC14510GHK
80
50QMA
80
50QMA
1,9
DVDD1,2
C578
C581
C741
10µ
0.1µ
0.1µ
+VA
L71
120Z/100M
25,38
AVDD1,2
C755
C351
C725
10µ
0.1µ
0.1µ
AGND
AGND
R391
22
8
5
ACSDOUT
10
ACSYNC
11
ACRST#
Audio Codec
L74
220
R390
22
6
ALC655
+VA
C339
0.1µ
U16
NC7S32
5
VCC
C335
R336
P
21
10K
4
12
Y
PC_BEEP
R335
C334
1K
100P
N/B Maintenance
N/B Maintenance
R405
0
28
MIC_VREF
R412
C751
R784
5.6K
4.7K
R783
R785
C764
0
21
MIC1
MIC
L554
C757
BEAD_600Z/100M
P
22
21
MIC2
48
C380
20
C377
U517
18
C385
19
0.22µ
R419
6.8K
AGND
C763
23
LINE_IN/L
C756
24
LINE_IN/R
R418
22K
R758
0
36
AOUT_R
R767
0
AOUT_L
35
31
C748
32
C746
L62
BEAD_600Z/100M
L520
BEAD_600Z/100M
AGND
L543
BEAD_600Z/100M
0
MIC_EXT
3
2
L548
120OHM/100MHZ
JO518
CAGND
SPDIFOUT
R420
CAGND
To next page
6.8K
CDROM_RIGHT
R407
6.8K
CDROM_LEFT
R438
0
CDROM_COMM
R406
R434
6.8K
0
R436
L79
0
BEAD_600Z/100M
R417
L78
0
BEAD_600Z/100M
R437
C381
C378
22K
100P
100P
CAGND
CAGND
AGND
R756
0
AMP_RIGHT
R771
To next page
0
AMP_LEFT
AGND
MIC1
P
1
21
+
2
-
JO517
P
21
J720
5
AGND
4
3
6
2
4
1
1
External MIC
J710
2
P
14
1
CDROM
Connector
3
J721
2
P
21
Line In Jack
3,5
J10
J9
CAGNDCAGND
130

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