Please help: Hitachi VM500E with jumpy image

[karadm]

I have a Hitachi VM500E VHS camcorder, that I am
trying to repair (I am an amateur). The picture is
extremely jumpy and the edges of the picture are not
aligned (line/frame syncronisation problem?) although
it is dificult to see, the picture is extremely jumpy.
I have replaced the belts, that didn't help (could the
"new" belts be siting in the store to long to be "new"?)
I also did a video head cleaning with no result.
Please anyone, any idea?

[karadm]

I think I was not specific enough.
The recorded image is very jumpy, while
palyback is OK, though out of tracking.
The camera section is OK. The problem is
in recording.
Could anyone with expirience in VCR repair
help?
Tthank you.
Kostas