Table 9-1 List Of Voltages Converted From Vhp_Pwr By Pm8029 Power Management Chip - Huawei U8815 Maintenance Manual

U8815
Maintenance Manual

Table 9-1 List of voltages converted from VHP_PWR by PM8029 power management chip

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Power-on failures are classified into three types: no current, weak current, and high current
and many of them are caused by power supply faults. If failures of these three types occur,
rectify them according to the circuit fault troubleshooting methods.
1.
2.
Issue 1.0 (2012-02-13)
Troubleshooting Process
No current: Connect your handset to DC power supply. Press the On key. The displayed
current ranges from 0 to 5 mA.
Weak current: Connect your handset to DC power supply. Press the On key. The
displayed current ranges from 5 mA to 100 mA.
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9 Principles and Failure Analysis
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