Charging Management Circuits; Figure 9-5 Troubleshooting Process For High Current - Huawei U8815 Maintenance Manual

U8815
Maintenance Manual

Figure 9-5 Troubleshooting process for high current

9.2.2 Charging Management Circuits


Issue 1.0 (2012-02-13)
Power-on
failure
Connect the handset
to a fake battery and a
maintenance power
supply and press On
to check the current.
Large current
Is the third pin of J1501
grounded?
N
Is the U201 voltage
normal?
Y
Return the
handset to the
factory for repair.
Circuit block diagram
The following figures show the charging management circuit diagrams.
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9 Principles and Failure Analysis
Y
Check U201 and
J1501.
Re-solder or
N
replace U201.
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