JVC Dynamic Drum Ultimate Fix

[Aristarhos]

Thank you Alex...
Maybe a custom steel sleeve with a bolt and nut could be applied directly...
But maybe then a plastic wheel with metal parts would be too heavy...
What do you think?

How about using aluminium washers?
First you glue the crack and then apply a washer of appropriate size with epoxy. That will prevent the gear from splitting again as the metal with the epoxy glue will hold it together.
Sony used plastic gears with very thin washers in small handycams some 20 years ago.

[dellsam34]

I have very good news, I swapped an entire cassette mechanism pulled from a Philips clone VR960B, It's a basic S-VHS deck with DA 4 heads, no FE head, so the head's ribbon cable is slimmer by 2 pins, I just had to slide it to the side of the socket as you can see in the attached video. Everything else fitted like a glove. The receiving machine is a JVC HR-S7600AM multistandard that has the DD bypass board designed by Hkorpim.

We don't know yet if regular VHS decks can be candidates since we don't know if the heads' gaps are similar, but I'm more inclined to believe that the heads are identical, Just the elctronics are different, hope someone can confirm this.

These later machines from JVC and Philips are very easy to work on, 4 screws and 2 plastic standoffs and you pull the entire mechanism out, it can be done in minutes. Just be aware that without the lid the VCR cannot function due to ambien light hitting the cassette sensors, To take the video I had to put the cover on top temporarily to get the playback started and then removed it to be able to shoot.

It's good to know that we can now fix these failing VCRs with other non TBC, non DD machines or even regular VHS machines provided the heads are the same.