Samsung GT-i9001 Service Manual page 34

8-3-1. Power On
' Power On ' does not work
check the current consumption
check current consumption
>=100mA
Check the Battery Voltage
is more than 3.3V
Check U501 (PMIC) and
Power on voltage
(C545 >1.1V, C546 >1.1V,
C549 >1.8V)
Check Resistance Values of
TA500, C556, TA501, C519,
C520, TA502 Are the values
are less than 100 ohm?
Check the Clock at
OSC501 that
Frequency is 32K Hz
check the initial operation
END
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
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No
Download again
No
Change the Battery
(Because of batt. power low)
No
Check the problem point (short, open, crack etc)
and If PMIC has problem, change U501
Replace capacitor or capacitors that has/have less
Yes
than 100 ohm resistance.
No
Check the clock generation circuit
(related to OSC501)
8-5
Level 3 Repair