Checking Flow
R302/C310/
C311/C312
J300.PIN1 = 2.85V
START
NO
Does the SIM cards
supports 3V ?
YES
NG
Check soldering
status of J300 and
Other component
OK
NG
Check J300.PIN1
OK
Re-download SW
Check Operation
OK
Change board
- 57 -
4. TROUBLE SHOOTING
Change the SIM Card. Our phone
supports only 3V SIM card.
Resolder J300 or
other component
Change board