Samsung SCH-811 Service Manual page 35

6-1-6 Abnormal Alert Tone
Abnormal alert tone
CLK waveform output
from U101, N7, P7?
CLK waveform output
from U102 pin 17?
CLK waveform applied
connection correct?
Check the buzzer
and replace if required
SAMSUNG Proprietary-Contents may change without notice
Yes
Yes
to Buzz?
Yes
Is the buzzer
Yes
Check U101 N7, P7.
No
Replace if required.
Check U102 pin 17, and its
neighboring circuits.
No
Replace if required
Check Q120, Q121, R128.
No
Replace if required.
No
Connect the buzzer correctly.
6-6