Panasonic RX-DS660. Trouble with cassette mechanics

[ooss]

Hi guys. I have this platinum collection boombox of Panasonic.

The first of all I fixed the left cassette because nothing working.

And now I have a problem with a cassette playing. The cassette deck working, but make an autorevers every 3-5 sec.
What do you think, whats wrong? I have no idea.
Look on youtube
https://youtu.be/jDY8hSw0qSI

 

[Superduper]

The reversing is a symptom that the deck has sensed “end of tape” condition. As you can see, because you don’t have a cassette installed, one reel is not spinning. It is unclear if this is contributing to this because many autostop decks will stop when play is depressed without a tape in the well. Try it with a tape & recheck.

If it still does this, then you might want to look into why the deck thinks there is an “end of tape” condition.

 

[Fatdog]

^^^ What Norm said.

 

[floyd]

I'm pretty sure this happens when there's too much drag on the pulleys because it replicates the drag caused by the end of the tape.

 

[Radio raheem]

put a tape in, that is because of enf of tape