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Aiwa ADF 770 Problem?

Happy New Year to you all

My Aiwa ADF 770 will not save the tape setting for bias/cal/eq

All 3 lights come on but it used to remember them and a ready light came on but not anymore?

This happens regardless of the tape type.

Any ideas?

Stephen



Aiwa ADF 770 Problem?

C9 may be bad (.047F, that would be Farad); it is a large value capacitor that holds current for memory backup. Or D46, 47, and/or 48 may be open (these are voltage dropping diodes for the 5 volts going to C9.

Aiwa ADF 770 Problem?

Thanks for the help

Where are the items located on the board?

Stephen

Aiwa ADF 770 Problem?

They are on the main (A) board which is L shaped; the diodes and capacitor are near the curve of the L. Also, you may have a problem with the 7.5 volt supply; transistor Q901 or resistor R904 may be bad, also on the main board on center right section.
The service information is in the library.