Troubleshooting - Samsung SCH-811 Service Manual

6. Troubleshooting

6-1 Logic Section
6-1-1 No Power
Press End button
U105 pin 1=VBAT?
U106 pin 1 input
U106 pin 5 output
U107 pin 5 output
6-1
Yes
=3.7V?
Yes
=3.7V?
Yes
=3.7V?
Yes
END
Check the signal from the battery
No
terminal to U 105 pin 1.
Check U105 and its neighboring
No
Check U106 and its neighboring
No
Check U107 and its neighboring
No
SAMSUNG Proprietary-Contents may change without notice
circuits.
circuits.
circuits.