SGH-P730 Flow Chart of Troubleshooting and Circuit Diagrams
2-
3
2. Initial
END
Yes
Check the signal at
the pin 21 of U101 is
"High" when the phone
is boot on
Initial Failure
Check pin4 of OSC402
Voltage is 2.8V ?
Check U401
Check pull_up R603,pin39 of U101,
OSC600, C613
No
Yes
Yes
No
No
Check pin5 of U103
Voltage is 2.5V?
Check or Change U300
Yes
Yes
No
Check pin3 of OSC600,
Frequency is 13MHz?
Check or change OSC600
Check OSC300 is
working?
No
Check the soldered status of U103,
U401