SAMSUNG Proprietary-Contents may change without notice
4. SGH-E105 Flow Chart of Troubleshooting and Circuit Diagrams
4-
1
This Document can not be used without Samsung's authorization
1.Baseband
1. Power ON
Check the current
consumtion more than
100mA
Check the
Vbat(
O)
Voltage more than
3.3V
Download again
NO
Charge the Battery
NO
Check U100 and C113
NO
YES
YES
YES
YES
'Power On' does not
work
Check the pin
15 of U100 is more
than 2.8V
U100 pin 46,39
= 2.8V
U100 pin 13
= 1.8V
Check the clock signal
at
pin4 of U800
Freq=13MHz ?
Vrms°√300mV ?
Vpp is around
900mVpp
Check the clock generation circuit
(related to OSC801 and U800)
NO
'Power On' does not
work
YES
END
YES
Check C114 and C116
NO
Check C112
NO