Level 3 Repair
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8-4
8-3-1. Power On
Mobile phone does not power on.
END
No
Yes
Check the TP506, TP518,
TP503 Votage level.
Is it over 1.5V?
It Can be Damaged AP(U403) or LPDDR3 Memory.
It is Needed to dump Memory or Check with S/W
Team to Analyze.
So, Change the PBA.
No
Yes
Check the U500 output voltage
(C528 > 1V,C531 > 1V, C535
> 1V)
If the output voltage is not satisfied with normal
condition, Change the U500.
※
Each voltage level has ±10% margin.
No
Yes
Yes
Check the Battery Voltage.
Is it more than 3
.
8V?
Charging the battery by TA.
If its voltage level is extremely low(under 3.3V),
Change the battery.
check the initial operation
Check the Clock OSC400,
OSC500
Is that frequency 24Mhz,
32khz each?
Change the OSC4000. or OSC500
No
Yes
No
Change the FRONT-LCD ASSY
or LCD Con-to-Con Connector
Yes
Push the Power Button for 8 seconds. Then
wait 3 minutes, check the power-on sound or
motor Vibration or light on touch key.
Sound or Vibration is ok?