G'day Jeff,



08 Oct 96 17:02, Jeff Green wrote to All:



 JG> As an example, I recorded Jurassic Park the other day. The sound was

 JG> fine for about the first 15 minutes and then it went real low ie at

 JG> max sound on the tv I could just hear the words over the hiss. Then,

 JG> of course, the sound goes back to normal and I get deafened. It kept

 JG> this up for vary times of normal and low sound all through the movie.



 JG> I've recorded other stuff on other tapes and the same thing happens.

 JG> Any ideas? (The VCR is an NEC N9063A from 1988 if that,s any help)



First thing to do is check your tapes for any creasing along the top

edge.  A creased tape is by far the most common cause of these

symptoms.



If the tape is creased you probably need a new pinch roller.

If the tape isn't creased, the pinch roller itself can cause these

same symptoms (and if you leave it to get worse it WILL crease the

tapes).  IOW, this could be a chicken/egg scenario.



If the tapes are fine, and its not the pinch roller, being an NEC my

next guess would be loose tape guides.



If the guides are fine then the only other possible cause I can think

of would be a worn audio head.



You would probably have no problem in replacing the pinch roller

yourself ($10 for a 'generic' type - up to $40 for an original NEC

replacement), but anything other than that is a job for the experts

'cos you'll need an alignment tape and tools.



Cheers,

Rod



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