Power On - Samsung GT-I9500 Service Manual

Level 3 Repair

8-3-1. Power On

Mobile phone does not power on.
Check the Battery Voltage.
Is it more than 3 . 8V?
Power-on the phone and
check the power-on sound
or motor Vibration.
Sound or Vibration is ok
Check the TAC1000
(soldering crack, open, etc)
Check the U600 output voltage
(C665 > 1V,C664 > 1V)
Check the Clock OSC5000
Is that frequency 24Mhz?
check the initial operation
END
Yes
?
No
Abnormal
Yes
Yes
Yes
Yes
Charging the battery by TA.
No
If its voltage level is extremely low(under 3.0V),
Change the battery.
Yes
Change the FRONT-LCD ASSY
Change the TAC1000(Power-key switch)
And retry to the power-on operation.
If the output voltage is not satisfied with normal
No
condition, Change the U600.
※ Each voltage level has ±10% margin.
No
Change the OSC5000.
※ Test condition (Oscilloscope setting)
: 20.0us.div (time division)
8-5