RC2019/03 update 4: Video Genie cassette interface repair attempt

This is part of a series for the Retro Challenge 2019/3.  Visit the index page for all the posts.

For the next repair, I return to the Video Genie I worked on last time.  I had fixed the CPU board, but still had problems with the power supply on the cassette interface board.

Here I have a go at diagnosing and fixing it.  Sadly it’s still a work in progress!

11 minute video here: