Question about Panasonic PV-V4021 S-VHS VCR

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Picture is jittery and voice is garbled with noise in background

Hi! After I have recorded a program and I want to playback the program the tape runs with a jittery picture and the voice cannot be understood. There is also a background noise. Please help me solve this problem. Thank you. Joan

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Re: Picture is jittery and voice is garbled with noise...

I had the same problem recently with a Panasonic PV - V4521 which has worked for years for me. I tried everything including cleaning the heads with Q-Tips and pure alcohol. Nothing improved. I tried tape head cleaners. Nothing. So finally one day, as I was unscrewing the cables, this VCR fell down onto the bottom of my foot and drew blood. Now remember, I had been trying to fix this thing for at least 10 days.
So, I dragged it up and pounded the top of the VCR until the top caved in. Then, I opened my front door and tossed it so hard against the floor of my patio that pieces went flying everywhere. I gathered up the pieces and the twisted VCR, put it in a box, and tosses it real hard into the dumpster. It's fixed. I have no more problem with it.

Posted on Jun 27, 2008

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Re: Picture is jittery and voice is garbled with noise...

Dear Joan, before I can help u, can you clarify a couple of points. Did you try your recorded cassetes in another VCR? Did the recording play properly on those? Is yours a Multi-System VCR? If yes, it is possible that you have set the input system to another system than the one you recieve? If you live in Europe, it is possible that you have set the VCR to NTSC recording? (Most of Europe is PAL. Or if you live in the North American continent, which uses the NTSC standard, you might have set the recording setting for PAL, and so are unable to view your recording. Another very common mistake people make is in setting Recording to LP or EP mode, and playing back the same tape in SP mode. Just check your VCR settings. If none of the above things are wrong, then try playing a Head Cleaning cassette. It is remotely possible that the Video Heads or Tracking /Contol Head is dirty. Pravin

Posted on Jun 27, 2006

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I beg to differ that the head is dirty. This is based on your post "...pre recorded tape is played the picture is fine..."

I am more inclined to suspect:

  • servo calibration. This would be the capstan motor controller. The recording speed slightly differs with the playback speed. You could try manually adjusting the tracking control and see if it corrects the problem;
  • recording speed selection, LP, SP, EP/SLP. try recording at the lowest speed LP;
  • video source, possibly of a different color system, PAL, SECAM, NTSC.
Hope this be of initial help/idea. Pls post back what is your video source, how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Posted on Sep 24, 2008

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Picture is jittery and voice is garbled with noise in background

Hello sneakymouse

It looks like you may have a servo or servo sync problem in either your recorder or your player. These are signs of such a problem. The circuitry that governs these function might be beginning to malfunction. Technically there is nothing that you can do in the way of repairing this unit you would have to have specialized equipment to trace down the source of the sync problem which is effecting your system. If you can not afford a repair shop right now I would suggest that you use your warranty and get it fixed. More than likely it is a problem with the servo IC or the sync oscillator circuitry.

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It sounds like the taped program was recorded on a different speed. The other VCR that you are playing the taped program may not have the speed needed to play it correctly.
Next time when you record a program try to make sure you use a speed that will be compatible on both VCRs.
For example a tape that last 120 minutes, using the different speeds will give the following recording times.
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LP means " Long Play" >>>>> 4 hours
ELP means " Extra Long Play" 8 hours

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hi sir
the speed in EP is differ from sp ,EP it is much slow then all quality would be less cause you are using less magnetic particles on the tape so here are many reasons for bad recording
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