Huawei H60-L04 Simplified Maintenance Manual page 46

H60-L04 Simplified Maintenance Manual
Remove the battery from the phone and connect the phone to a DC power supply. Power on
the phone and check the current on the phone.
Figure 10-3 Connecting the phone to a DC power supply
DC power supply
Output 3.7 V

No current: Check whether the power key functions properly. Change the PCBA if the
failure is not caused by the power key.

Weak current (25–80 mA): Forcibly upgrade the phone software using a microSD card or
USB cable. If the upgrade fails, replace the PCBA.

Excessive current (or high current): If the current is above 800 mA, replace the PCBA.
Troubleshooting Process

Troubleshooting process for no current power-on failures
Figure 10-4 Troubleshooting no current power-on failures
Issue 1.0 (2014-09-04)
+
—
No current power-
on failure
Is the battery connector
J1401 malfunctioning?
No
Is the power key FPC
malfunctioning?
No
Replace
the PCBA
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
10 Troubleshooting
+
Phone
—
Yes
Replace
J1401
Yes
Replace
the power
key PFC
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