I got a JVC HR S8000U S-VHS VCR used to make transfers from pre-recorded VHS to DVD-R, it is working well but with somes VHS the sound is switching from stereo to mono during playing.It play well on mono if i press the AUDIO MONITOR button.I try to adjust the tracking but most of the time it didn't help. I have this problem with somes VHS who play flawlessly on a cheaper Sony stereo VCR. I try many used VCR over the years and had similar experiences. Thanks for yours advices.
It is a tape head problem it is already near to run out,replace it with a new one,so it will back to normal..
hope this may help;
Here I suggest one thing, Just clean Stationary Audio/ Control head and see the results. This Audio/ Control head is situated just before Pinch-Roller at Capstan motor.
Well, either the CTL signal is weak in playback or Video signal has distortion, you will get noisy Hi-Fi audio or VCR will switch to Mono Audio. Please observe the tape path to get better and nosie free (tracking error) video and see any error at CTL when tape is running on it. If tape has wrinkels on edge, it might not give correct Hi-Fi audio. Hope this info will help you to rectify the problem.
Any improvement in your VCR, JVC HR-S8000 or need mode help?
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Usually you get this from dirty VHS heads, use an head cleaner VHS tape to clean it.
If it switch to mono in the meaning that you have same sound on two channels and no stereo effects, then it depends on the heads. If cleaning did not fix you will need to adjust the azimuth, as the heads are not well positioned on tracks.
Check also that some of the tractors are not pulling the tape up or down after a while.
If one channel lose suddenly sound, instead it can be a problem in the amp board
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I cleaned the heads using the tips from these pageshttp://www.hometheaterhifi.com/volume_5_... and experience the same problem. Sound using hi-fi tracks go out occasionally or switch to mono.
Head cleaning didn't help, i remove the glazed from the pitch roller too.I have this problem with about 50% of my VHS used or new, maybe they are not recorded with the correct azimut or it's the limitation of this technology because i experience the same problem with others VCR. Adjusting the azimut seems a tricky task.
New heads are available on the net for 50$ first i will look for how much it will cost to remplace them.
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