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Flow Chart of Troubleshooting
10-14
10-1-6. Speaker Part
Check
UCD402, U403
Check the
UCP101
There is no sound from the Speaker
The terminal of Speaker is
O.K
No
Replace the Speaker
Yes
There is any signal
@ C503, C504
Yes
No
Check LCD or Replace HDC501
The type of sound
from the Speaker is
Melody
There is any signal
@ C403, C404
There is any signal
@ R400, R408
Yes
No
The pin#4 of
U401 is "High"
Yes
Yes
No
No
Check the UCP201
Check the U401
Yes
No
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