Nathan Gutman wrote:
This system has two decks A and B. When I press a lever the tape door
is supposed to open to take the tape out. I press the lever in deck B
and the door does not open.
How can get the tape out on this system?

Probably has eaten a tape to the extent that the tape is totally built up
around the capstan, jammed there where the capstan meets the pinch roller,
or else the mech itself is locked in the "up" position, and would have to be
released from the rear if possible. Maybe a job for a technician.

Mark Z.