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9.2.2 Low Current (DC power supply)
Reference Figure 9-3
U201 output
VREG_MSMC1
VREG_MSMC2
VREG_MSME
VREG_PA
VREG_RUIM
VREG_MSMP
VREG_MSMA
VREG_WLAN
VREG_RFRX1
VREG_RFTX
2011-05-18
U8350 Maintenance Manual Basic Version V1.0
Low current
Download the latest
firmware software
Version, then test if it is
normal?
N
Measure whether
The output frequency value
of U3101 Pin3 is 19.2MHz?
Y
Measure whether
the output voltage of the
U201 is normal?
Y
Replace U601,
Then test whether it is
normal?
N
Replace the U401
Default value
1.2V
1.2V
1.8V
2.7V
1.8/2.85V
2.6V
2.6V
2.85V
2.1V
2.7V
Huawei confidential. No spreading without permission.
Y
End
Replace the
N
U3101
Replace the
N
U201
Y
End
Test point
L207
L206
L208
L205
C225
C221
C222
C230
C223
C226
Internal
Page 35 of 68
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