I don’t think you can anymore. You’d have go back in time to 1989 and contact RCA :)
A possible option is to look on ebay for a used model then pull the circuit board out of it. I’ve seen parts also for sale. I also use shopgoodwill.com for finding these things. I wanted parts for one of mine but ended up getting one in better shape so I don’t want to take it apart.
I’m not sure if this is your problem but I ran into similar issues with my CPR-350 SVHS camcorder. The tape would wrap around the play head but not move. I needed to replace the pinch roller which is the rubber cylinder before the play head. it was old and not gripping the tape enough. Also I ran into additional issues due to the video head being dirty. It wasn’t visibly dirty but the tape had trouble with it anyway. I cleaned it with alcohol Q tips and an old tooth brush then it worked a lot better .
Also there is at last 1-2 more rubber belts in there, a square tubular belt and a flat belt. I ordered replacement belts for those and the eject belt because rubber bands have a really short lifespan and if you can get them to work, they won’t last more than a couple years.
Zodra ze een reputatiescore hebben bent je in staat om een grafiek te zien van het verloop hiervan.
Hier is een voorbeeld van hoe de grafiek eruitziet:
Nog geen reputatiescore gekregen.