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8-3-2. Initial (Lock up)
Re-download SW the phone.
Check the PMIC_PS_HOLD
TP303 = 1.8V(High)
Check the Clock OSC400(C401)
Is that frequency 19.2Mhz?
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Initial Failure
Abnormal
Yes
Normal
Change UCP300
Abnormal
Change PBA
END
No
Check the U400 (Crack, Open, etc.)
Change the OSC400
If OSC400 does not still work, Change the U400
Abnormal
This problem is internal oscillator of U400
※ Test condition (Oscilloscope setting)
: 20.0us.div (time division)
8-7
Level 3 Repair
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