VintageVic
Experienced Member
Alps mechanics are pretty good, but they too can suffer from misalignment (causing file not found error? when read is attempted).
Your latest drive was modified, right? Check that its mechanics wiring is not modified also.
I always have at least one working drive to test issues (or parts) of the failed drive. It is very helpful when you can rule out say, that the mechanics is guaranteed
to work, because it works with the other pcb. Then I can focus on failed pcb and not chase ghost on trying to repair already working mechanics.
It also works backwards. If the issue is indeed in the mechanics, all of your 6522's could be ok. So, do not throw them away just yet.
Your latest drive was modified, right? Check that its mechanics wiring is not modified also.
I always have at least one working drive to test issues (or parts) of the failed drive. It is very helpful when you can rule out say, that the mechanics is guaranteed
to work, because it works with the other pcb. Then I can focus on failed pcb and not chase ghost on trying to repair already working mechanics.
It also works backwards. If the issue is indeed in the mechanics, all of your 6522's could be ok. So, do not throw them away just yet.