MiTAC 8050 服务手册
8050
8050
N/B Maintenance
N/B Maintenance
120
MODEM Test Error
No
Test
OK?
No
Replace a known good modem
Re-test
OK?
Board-level
Troubleshooting
Troubleshooting
1.Check if the driver is installed properly.
2.Check if the notebook connect with the
2.Check if the notebook connect with the
phone LAN properly.
Correct it.
Replace
Motherboard
Signals:
Yes
+5V
+3VS
+3V
MONO_OUT
ACSDOUT
ACRST#
ACSYNC
ACBITCLK
ACSDIN1
MODEMP
MODEMN
+3VS
+3V
MONO_OUT
ACSDOUT
ACRST#
ACSYNC
ACBITCLK
ACSDIN1
MODEMP
MODEMN
J717
J715
U726
R1132
C937
R498
L69
R1120
R1131
L724
F2
J715
U726
R1132
C937
R498
L69
R1120
R1131
L724
F2
Yes
Correct it.
Parts:
Check following parts and signals:
8.12 Modem Test Error
An error occurs when run the modem