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8. Level 3 Repair
8-4-1. Power on
power on the phone and
check the power-on sound
or light on touch key sound
is ok?
Check the Clock OSC7000
is that frequency 19.2MHz
END
Change OSC7000
NO
check the initial operation
NO
YES
YES
Check the C7095, Output
voltage
If the voltage is not satisfied with normal
Condition, replace U7010
N
O
YES
Check L8002, R8001,
R8003 soldering,
Change the Material And retry to the power on
operation
abnormal
YES
YES
Mobile phone does not power on
Check the battery voltage
is it more than 3.4v?
Charging the battery by TA, its voltage level
extremely low(under 3.3V) Change the battery
NO
YES
Change the lcd module
NO