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9.2.2 Low Current (DC power supply)
2010-12-21
U8500 Maintenance Manual Basic Version V1.1
Low Current
Download the software. Then
inspect if the U8500 is OK?
N
Measure if the output
voltage of the U201 is normal?
VREG_RFRX: 2.1V
VREG_RFRX2: 2.7V
Y
Measure if the voltage of
VREG_MSME is 1.8V?
Y
Measure if the voltage of
VREG_TCXO is 2.85V?
Y
Measure if the output
voltage of the U201 is normal?
VREG_MSMC1/C2: 1.2V
VREG_MSMA: 2.6V
VREG_MSMP: 2.6V
N
Replace U401 whether it is OK?
N
Replace the U201
Huawei confidential. No spreading without permission.
Y
End
Replace the
N
U3801
Replace the
N
U601
Replace the
N
U3101
Refer to Picture 9-2
Internal
Page 40 of 62
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