I just got a used DEH-80PRS over the weekend and decided to disable the annoying beep any time an action is performed. Disassembly instructions can be found here:http://tinyurl.com/obzmycp. The piezoelectric speaker is on the main board and is circled in red here:
All you need to do is desolder this and reassemble the unit.
All you need to do is desolder this and reassemble the unit.
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