Samsung SM-T520 Service Manual page 32

8-3-1. Power On
Mobile phone does not power on.
Check the Battery Voltage.
Is it more than 3 . 8V?
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
Check the U500 output voltage
(C528 > 1V,C531 > 1V, C535
> 1V)
Check the Clock OSC400,
OSC500
Is that frequency 24Mhz,
32khz each?
Check the TP506, TP518,
TP503 Votage level.
Is it over 1.5V?
check the initial operation
END
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Yes
?
No
Yes
Yes
Yes
Yes
Charging the battery by TA.
No
If its voltage level is extremely low(under 3.3V),
Change the battery.
Yes
Change the FRONT-LCD ASSY
or LCD Con-to-Con Connector
If the output voltage is not satisfied with normal
No
condition, Change the U500.
※ Each voltage level has ±10% margin.
No
Change the OSC4000. or OSC500
No
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.
8-4
Level 3 Repair