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3. SGH-V100 Flow Chart of Troubleshooting
3-
1
1.Baseband
1. Power ON
Check the current
consumption more
than 100mA
'Power On' does not work
Check the Voltage
more than 3.3V
Download again
Charge the Battery
Check the pin
15 of U100 is
more than 2.8V
Check U100 and C113
U100 pin 46,39
= 2.8V
Check U100 and C112
Check the clock
signal at pin4 of
U704
Freq=13MHz ?
Vrms≥300mV ?
Vpp is around
900mVpp ?
Check the clock generation circuit
(related to U703 and U704)
Check the initial operation
END
No
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
U100 pin 13
= 1.8V
No
Yes