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8. Level 3 Repair
8-4-1. Power On
Mobile phone does not power on.
Check the Battery
Voltage.
Is it more than 3
.
8V?
Charging the battery by TA.
If its voltage level is extremely low(under 3.0V),
Change the battery.
Power-on the phone and
check the power-on sound
or motor Vibration.
Sound or Vibration is ok?
Change the FRONT-LCD ASSY
Check the voltage level at
ANT5007 while pressing power
key. Is the voltage high?
Check the signal of
PWR_HOLD = 1.8V
Check the Clock OSC2000
Is the frequency 26Mhz?
Replace the POWER KEY FPCB.
Replace the PMIC
check the initial operation
END
Yes
Yes
Abnormal
No
No
Yes
Yes
No
Yes
Replace the OSC2000.
※
Test condition (Oscilloscope setting)
: 20.0us.div (time division)
No
Yes
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