Sony CMT-EP505 CD Shelf System Logo

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salih cem Posted on Jan 20, 2007
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Unit works from remote only, buttons on it do not. How can I reset the unit?

I own a SONY CMT-EP505. It works only from the remote control. The buttons on the unit are not functioning properly. When you place one of them, it does something but not what it has to do. For example, when I push CD button, it fast forwards the tape. So Ithink it needs a reset. I don!t know how to do it? Can you help me? Regards.

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Mike Duncan

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  • Posted on Jan 21, 2007
Mike Duncan
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Look for owners manual at Sony web site. If there is a way to reset then that would be a good place to look. Doing a reset is a good idea. It could clear the "brain" on the unit. If a reset fails to repair then you may have a microprocessor problem. Something else that might be the problem, some units use a voltage "ladder" made of resistors to determine which button has been pushed. If the base voltage or ground is off on the ladder then all the buttons on that ladder will be interpreted wrong. Sometimes even just dirty contacts on the buttons themselves will cause that "ladder" step to be off when it is pressed. Good luck.

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