User Guide

5-14 Flow Chart of Troubleshooting and Circuit Diagrams
5-8 Alert Tone
Abnormal Alert tone
ALERT by Test S/W
Is there alert wave form on the
R305 during alert tone test?
Is there alert wave form on the
Q300 pin 3 during alert tone test?
U470 pin 5 3.3V?
Check the circuit related to Q300
END
Check the circuit related to U470
Yes
No
Yes
Yes
No
No
Buzzer is ok? Change the Buzzer
Yes
No