Lenovo I360 Maintenance Manual page 22

I360 Mobile Phone Maintenance Manual
Vibrator motor
16
failure
Recharging
19
failure or
charging
indication
The battery is not
20
fully charged
after long time
charging
21 Hot charger
Long time
22
charging
23 Abnormal
charging
LENOVO
Lenovo Mobile Telecommunications Co., Ltd.（OPEN DOC）
Abnormal signal for SIM
control from the main chip
Damaged SIM socket
Pseudo soldering of the SIM
socket
Software problem
Damaged vibrator motor
Vibrator motor
fall-off
Short circuit between the
two pins of the connector on
the system board
The power plug is not well
no con nected
Damaged battery
Battery voltage lower than
3.2 V
Poor connection between the
battery and the
connector
18-pin connector soldering
problem
Check the char ging MOS
tube Q304 on the PCB and
ch eck the resistor connection
Poor battery connection
High charger output voltage
Charger output voltage is too
low
Pseudo soldering or partly
damaged analog baseband
chip U202
Check the signals that control the SIM
card, including VDD, RST, CLK and
I/O
Replace with a new SIM socket
Check the connectors of the SIM card
reader. Do some cleaning to find any
fall-off or short circuit. Touch up the
connectors or replace the SIM socket
when necessary.
Update the software
Replace with a new vibrator motor
connector Solder again
Solder again
Check the plug connection with the phone
Replace with a new battery
When the plug is well connected, the
charging indicator should appear
minutes after the charging is started
Replace the battery connector
battery
Checking the soldering of this 18-pin
connector
Solder again or replace with new elements
when necessary. If the MOS tube is
installed mistakenly, replace the tube.
Remove and reinstall the battery. Then
recharge it.
Check the charger output voltage. If higher
than 5.5V, replace with a new charger
Check the charger output voltage. If lower
than 5.0V, replace with a new charger
Replace with a new U202
v0.1
15—30
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