JVC HR-S8000U Won't Rewind

[olePigeon]

Hello, I'm new to the forums.

I'm having issues with my JVC HR-S8000U. It won't reliably rewind. Usually it just attempts to rewind, then stops. Sometimes it'll rewind for a little bit, then stop. And on very rare occasions it'll rewind normally.

Play & Fast Forward work fine. Play used to not work reliably, but I loosened the tension belt a tiny bit, and now the Play seems to work fine.

Below is a video I made so you can see the issue. You can see I attempt to rewind several times, but it doesn't work. Fast Forward is fine. Play is fine. When I was attempting to troubleshoot it, I thought I had it reliably working by covering the Supply Sensor. But the next day when I went back to continue trouble shooting, even covering the Supply Sensor didn't help much.

I'm hoping someone else has run into this issue and might have some advice.

The chassis board that has the supply sensor is getting 12.5v (a little high, supposed to be 12v), but the Phototransistor is getting 5v on the dot like it should. I recapped the power supply because it had a bad cap. I also removed all the glue and adhesive pads from the various PCBs. The rewind issue has persisted.

https://youtu.be/KzowZIwONzU

Thanks for any help.