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Old 28th May 2021, 6:02 pm   #5
monaro0162
Pentode
 
Join Date: Sep 2016
Location: Stansted, Essex, UK.
Posts: 158
Default Re: Bringing a Sony C7 Betamax back to life

I got machine 2 going, ironically the one I haven't yet changed the belts on! The logic is working fine now, the stuck led has gone away. It was a gummed up mechanism that pulls the tape out of the cassette on load.. wasn't returning to the corrrect 'park' position after eject. Also there was a similar issue with one of the position sensors on the loading ring next to the motor on the top left hand side.

It now loads and plays, although the picture is a mess. It isn't maintaining servo lock, as far as I can tell, I can hear the head drum hunting, and the picture rolls with colour coming in and out. I'll change the belts next ... and am assuming that I'm going to need to recap the servo circuitry?
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