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Flow Chart of Troubleshooting
3-13
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3-1-6. Speaker Part_2(RECEIVER)
③
②
①
There is no sound from the Speaker
Is the terminal of Speaker
O.K ?
No
Replace the Speaker
Yes
Are there any signals at
the PIN#3, #9 of IC9 in
LCD
No
Check
IC9
Yes
The pin #5, #7
of IC9 in LCD is "Low"
No
Check
UCP201
Are there any signals at
the PIN#4, #8 of IC9 in
LCD
Yes
No
Check
U100
Yes
Check
UCP201
END
④