Sound problem during VHS capture?

[monks19]

Hi, I've been doing some vhs captures with my svhs unit (JVC SR-V101US) for a while now without any trouble until recently. The issue I'm having is that some kind of noise happen when a vhs tape is rolling during capture. I dont know what's causing this, but I know that it doesn't apear at the the same places (whem playing the tapes) and that the issue is gone momentarilly when I'm plugging and unplugging the rca cable (which has been replaced 3 times this week) and when I eject the vhs to put it back in the vcr. I tried to play some the same tapes on another unit (Panasonic AG-W3) and the issue is no longer there. I did the same with a Sanyo unit (VHR-H532) with the same results with the Panasonic. So, what could be causing this ? I've thought that the JVC unit might need a good internal clean up, but I prefer to ask some advices to some of the experts here (Lordsmurf & all) before doing so.

I've attached an audio sample for you to see. Let's hope that this issie can be solved.

Thanks to answer as soon as possible, it's very important.

[volksjager]

try switching from hi-fi to norm audio in the menu.
JVC's can be touchy with audio noise on certain tapes.

[monks19]

Yeah, I know, but the thing is some of the tapes has been tested before that issue occur without any trouble. Now, it always happen whenever I play a tape. On normal audio it's not better since I alwas end up with a big hiss on the whole thing and audio noise interferance (radio and electric). So...

Any other suggestions ?

[volksjager]

try cleaning the drum.
the Hi-Fi head are in the drum.
dont use a cleaning tape - they are useless
use a chamois cleaning stick with 91% alcohol (available at any drugstore)

[monks19]

I got 72% isopropyl alcohol at home. Will it do or do I have to ger absolutely the 91% ?

[JMP]

70% or better will work.