MediaPad 7 Lite Maintenance Manual
INTERNAL
2012-10-08
Huawei Confidential
Page 42 of 82
Charge failure
Check the output voltage
of the U1801 and check whether the voltage of
the C1822/C1823 is 3.7 V.
No
Replace the U1801.
Yes
Check
whether the voltage of the
R1818 is normal.
No
Replace the U1800.
Yes
Replace the coulometer
of the U1800.
9.4 Failure to Identify the SIM Card
The following figure shows the principles of the SIM card.
The SIM card cannot be identified. For the solution, see Figure 9-2 (component layout of
MediaPad 7 Lite).
