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Flow Chart of Troubleshooting
9-16
9-6. Speaker Part(Melody)
Speaker does not work
Yes
No
Replace the contacts
Check the contacts
SPK500, SPK501
Yes
Check the signal at
C508, C513 of U500
Check all power source
related U502
and resolder or replace U502
No
Check the signal at
C544, C540
Yes
Check all power source
related U500
and resolder or
r
eplace U500
No
Yes
Does it work?
Change the PBA
No
Yes
END