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5-8 Alert tone
Abnormal Alert tone
Is there alert wave form on the
R539 during alert tone test?
Is there alert wave form on the
Q500 pin 3 during alert tone test?
Flow chart of trouble shooting
Yes
Yes
U100 pin 3
3.3V?
Yes
Buzzer is ok?
Yes
END
No
ALERT by Test S/W
No
Check the circuit related to Q500
No
Check the circuit related to U100
No
Change the Buzzer
5-13
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