MiTAC 8050QMA Service Manual page 134

8.11 LAN Test Error-2
An error occurs when a LAN device is installed.
+AVDDL
+AVDDH
+DVDD
PCI_AD[0..31]
PCI_AD20
P
11
U709
R213
South Bridge
0
ICH6-M
80 50QMA
80 50QMA
+3V
33...
R508
P
15
100
46
31
ICH_PME#
44...
PCI_C/BE[0..3]
U717
65
PCLKRUN#
68
PCI_DEVSEL#
61
LAN
PCI_FRAME#
29
PCI_GNT3#
Controller
30
PCI_REQ3#
25
PCI_INTE#
RTL8100CL
63
PCI_IRDY#
67
PCI_TRDY#
76
PCI_PAR
70
PCI_PERR#
75
PCI_SERR#
69
PCI_STOP#
N/B Maintenance
N/B Maintenance
+3V
R696
3.6K
1
106 P
EECS
CS VCC
15
U511
2
111
EECK
SK
3
109
EEDI
DI
93C46
4
108
EEDO
DO GND
1
2
5
6
14
15
18
19
R683 R682 R670 R667
49.9 49.9 49.9 49.9
C668 C651
0.01µ 0.01µ
GND GND
121
LAN_XTAL1
R686
1M
122
LAN_XTAL2
X503
C681 C682
25MHZ
27P 27P
8
C660
1µ
5
12
PMDI0+ 13
MDI0+
3
P
15
11 14
PMDI0- 4
MDI0-
9 16
PMDI1+
MDI1+
3
8
17
PMDI1- MDI1- 4
6 19
PMDI2+
MDI2+
3
U507
5
20
PMDI2- MDI2- 4
3
22
PMDI3+ NS692408 MDI3+
3
2
PMDI3- 23
MDI3- 4
24
21
18 MCT3
15 MCT4
R227
75
C263
1000P
GND_45
J506
L512
90Z/100M
1
PJTX0+
2
P
15
2
1
PJTX0-
L63
90Z/100M
3
PJRX1+
2
6
1 PJRX1-
L68
90Z/100M
4
MDO2+
2
5
1 MDO2-
L67
90Z/100M
7
MDO3+
2
8
1 MDO3-
MCT1
MCT2
R202
75
R204
75
R20
75
133