Samsung SCH-3500 series Service Manual page 38

8-1-6 Abnormal Alert Tone
Abnormal Alert tone.
'Low' level on U902 pin 17?
CLK waveform applied
to Q902 Base?
CLK waveform applied
to Q901 Base?
Is the buzzer
connection correct?
Check the buzzer
and replace if required.
NO
YES
NO
YES
NO
YES
NO
YES
SAMSUNG Proprietary-Contents may change without notice
Check U902 pin 17. Replace if required.
Check R922, Q902.
Check R934, Q901
Connect the buzzer correctly.
8-6
Trouble Shooting