A SERVICE OF

logo

SAMSUNG Proprietary-Contents may change without notice
10-1
This Document can not be used without Samsung's authorization
10. Flow Chart of Troubleshooting and Circuit Diagrams
10-1.Baseband
10-1-1. Power ON
Charge the battery
'Power ON' Does not work
Pin 3 of U301 is high?
If not, solder U301 again
or replace.
NO
NO
NO
YES
YES
YES
battery voltage > 3.6V
VoltageofPin5ofU301
>3.3V
Voltage of TA314
>1.35V
Pin 1 of U307 is high?
If not, solder U307 again
or replace.
Check the initial operation
NO
Pin 3 of U302 is high?
If not, solder U302 again
or replace.
YES
VoltageofPin5ofU302
>3V