Purchased this deck for peanuts a while back and it’s been sitting idle. Tapes will play in both directions for a few seconds and stop. Maybe go a few more seconds in FF/RW and stop. Never connected it to a receiver or pre. Service manual is available. Built in 86. Being an ES I have to figure it was a nice unit when new. Didn’t get any hits when searching AK. Just trying to determine whether to put any cycles into this. Thanks in advance.