Flow Chart Of Troubleshooting - Samsung GT-B2100 Service Manual

10. Flow Chart of Troubleshooting

10-1. Power On
'POWER ON' does not work
Yes
Check battery voltage
is higher than 3.3V
OK
Check VCC_SYN_2.8V
and VDD3_1.8V of U101
OK
Check the pin 1 of
OSC100 produces clock
signal
OK
Check the pin 7 of U101
produces 26M pulse signal
OK
Is Power On working?
Yes
END
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Not OK
Not OK
Solder PMIC, U101, C127 again
Not OK
Not OK
Solder OSC100, U101 and C127 again
No
10-1
Change battery
Solder OSC100 again
Repeat sequence