I have two MZ B10 units. One I've used for a long time, and one bought new as spare some years ago and never used.
When older unit had trouble reading a disk, I tried it in "New" unit and had same problem.
I have a third working unit, and confirmed all discs tried were OK.
A local authorized Sony repair shop said both optical sensor were bad, and no parts available. As one is brand new, I'm doubting technicians assessment.
Question:
1) Can the optical reader be adjusted/ calibrated?
2) Where is a good place for repair in North America or UK? I'm replying to myself just to see where any replies will go to. I'm replying to myself just to see where any replies will go to.