Since I have two of these tape decks, I thought I would de-solder one or two of the 96 electrolytics buried in each of these things. So the very first one I checked was on the Meter/LED board (PX01).
Would you believe, it appears to have been installed backwards
What are the odds of that!
Sure enough, the (-) side of the 10uf/16v capacitor (CX01) goes straight to pin 10 of the LC4011B (QX01).
All I can say is, thank goodness I have ten other projects I haven't finished from last year
Back in the box these go!