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Flow Chart of Troubleshooting
10-8
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10-1-5.
Receiver Part
10-1-6.
SPK Part
There is no sound from the Receiver
Is the terminal of Receiver
O.K
?
No
Replace the Receiver
Yes
No
Yes
Check
U400,R413,R415
Is there any signals at the
pin#
P11
and pin#
R12
of
UCD3
00 ?
END
There is no sound from the Buzzer
Is the terminal of Speaker
O.K
?
Replace the Speaker
Is there any signals at the
pin#
R13
and pin#R14 of
UCD300
?
Check UCD300
Check D1, D2
(
LCD PCB Part)
END
Yes
Yes
Yes
Yes
No
No
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