I don't know your answer, but I have one here right now to look at-

-There is no rubber belt on the spindle to the counter. The count is derived
from the opto-interrupt behind the spindle.
-The counter does not reset when the door is opened.
-The mode cam leaf switches are right on top of the transport mechanism
right side. Very easy to access when you lift the cover.
-On a unit of this age with funky logic, I'd also start with the power
supply and other electrolytic capacitors. After that, you might have your
work cut out for you!
-I have seen mode cam motors freeze causing bizarre transport behavior. I've
been able to get them working by rigging them to spin at high speed for a
bit from an external supply.


in article , EADGBE at
wrote on 4/17/07 8:12 AM:

Thanks for the good info so far! I am pleased to hear that it might
be something as simple as a belt.

But two questions continue to bother me:

If it is just a belt (or dirty leaf switches)....

1) Why would the digital counter always re-set itself to "0000" when
the problem occurs?

2) Why would the deck go BACK into PLAY mode when I have pressed
STOP? It will go back into PLAY mode even if NO tape is inside the
machine!