Huawei Y300 Maintenance Manual page 63

Y300 Maintenance Manual
Figure 9-35 Troubleshooting process when the motor does not vibrate
Circuit Symbols
Signal
Symbol
VPH_PWR
VIB_DRV_N
Issue 1.0 (2013-01-24)
The motor does not
vibrate.
Is the software
properly
reloaded?
N
Is the motor dry
jointed?
N
Is power properly
supplied to the motor?
Is the voltage at the
cathode lower than
that of the anode?
Y
Does the motor
operate
properly after
replacement?
N
Return the Y300 to
Huawei for repair.
Description
Main power supply signal, supplying
power to the motor
Motor drive signal pin, connected to
the motor's cathode
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9 Principles and Failure Analysis
Y
End
Y
Re-weld the motor and
verify that it is properly
soldered. The
maintenance process
then ends.
N
Check the
power.
Y
End
Reference Measurement or
Waveform
None
None
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