Sharp R-8320E

6.
1
BUZZER DOES
NOT SOUND
Is normal
waveform (2.5KHz)
applied across pin No. 1 and 5
of relay unit connector
(DI ?
Yes
No
]No
Is normal
waveform (2.5KHzI
applied across pin No. 42 (D, 1 of
LSI (l-2) and “GND”?
Yes
>
Replace
Buzzer (St’1 1
l Defective 050
0 Wrong constant of
R51, R52 & R53
l Poor soldering
94