Huawei Mediapad S7-PRO Maintenance Manual page 81

2012-07-20
S7-PRO Maintenance Manual (Basic Version V2.1)
Power on the
board
Whether the 37.4
MHz crystal (X4)
is normal
Y
Yes
Check whether the power
output signals TX_WLBG
and TX_BT of U11are
normal
Yes
Check whether U43 pin
1 can output power
signal normally
Yes
Check whether Z11 pin 1
can output power signal
normally
Yes
Check whether Z18 pin 3 can
output power signal normally
Yes
End
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Maintenance procedures
No
Replace X4
No
Check the power supply for U11. If any
exception is found, replace U11
Check the power supply and control
No
signals of U43. If any exception is
Y
found, replace U43
No
Replace Z11
Replace Z18
No
INTERNAL
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