Trouble Shooting - Samsung SCH-A310 Service Manual

8. Trouble Shooting

8-1 Logic Section
8-1-1 No Power
Press PWR button
U201 Pin1>=3.3V?
YES YES YES YES
U201 Pin5=2.8V?
YES YES YES YES
U200 pin 4=2.8V?
YES YES YES YES
END
NO NO
NO NO
NO NO NO NO
NO NO
NO NO
SAMSUNG Proprietary-Contents may change without notice
Check Battery and its neighboring circuits
Check U201, U203 and its neighboring circuits .
Check U100, U120
and its neighboring circuits.
8-1