Hello everyone i got this Marantz i need help fixing it first the tape player dosent work i hear the motors but no movement and then the tunner knob is broken of it looks like the old owner tryed to glue the knob on so cuz of that the tuner is stuck on one channel can someone send some tips or does anyone know where i could send it for repair in california really want to get this box 100% again

Oh, that sucks so much. Wish i had a Marantz.
For the tunner knob, i think you need to replace the whole rod with another one.
Usually, the tuner knobs are basically just a rod with a rotary device on the other end. Open it and see if the rotary device does come out from the rod.
Since the other side is glued into the button, i think you can remove it by carefully drilling into it with a low rotation electric screwdriver. Cannot stress enough on the "careful" part.
Good luck and let us know how that turns out.

Thanks for the advice iam going 2 try it 2day but it sounds like crazy mission

If you can't fix it or grow tired of the Marantz.
Please keep me in mind as I would be interested in buying or trading it from you.....