Question about Sony SLV-N750 VHS/S-VHS playback VCR

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Poor playback Pre-recorded tape playback picture is wavy/jittery. Tracking adjustment does not fix it. Have cleaned heads with a wet cleaner. Sometimes looks like TV vertical hold is out of whack but is not. Cable TV goes through VCR but no problems with that picture. The really wierd thing is when I have a blue screen on the TV for the VCR mode, the blue screen is also showing a wavy section when the tape is not playing.

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  • Robee1 Dec 31, 2007

    Thanks, can't see doing a $150 fix on a $75 VCR. Thank you for responding.



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Because the cable signal is OK, this eliminates the tuner as your problem and leaves the power supply which is a common problem. It is a switch mode type which often have trouble maintaining control of its output voltages and produce trouble downstream in the video circuitry. Either the power supply is failing which can be wholesale replaced for about a $150, or something somewhere else is failing and loading down the supply causing it to overwork. Usually in this case, you can hear a whine noise if you listen close.

Posted on Dec 28, 2007


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The picture on my vcr keeps going off or shows wavy lines when words come on screen why is this please?

Poor tracking possibly caused by a dirty video heads. I would use a head cleaning tape. Then adjust the tracking controls for best picture.

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Picture rolls on playback

Try cleaning the heads, but it seems like the heads may be faulty, you might need to replace the vcr, they don't cost much these days, the repair might cost more than a new vcr these days.

heres a cheap headcleaner, look for one at local shops, wallmart bestbuy and so on

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Do you have a tracking control on the
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record It can be adjusted during playback
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If you dont have a tracking control on the
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special tools to perform

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When was the last time you ran the "head cleaning" tape in the machine? As tape collects dust and dirt - it gets deposited on the recording and playback heads. This ruins playback and recording quality. Also, since tape is magnetic - they tend to magnetize the heads, too (just like reel to reel, 8 track & cassette player / recorders). Demagnetizing them will help too. Here are links to both products:

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Buzz during playback, but only on SOME tapes!! When i adjust tracking manually, pictures quality suffers.

Bad recording VHS or old VHS tapes,will sometimes causes this problems,because of degrading magnatic tapes.Sorry this problems,u did the fixed adjusting manual tracking,that it not fixing the problems,sorry that all u will getting that kind of quality of picture.

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Jittery video and sound, and now no playback

You may have damaged the heads if your cleaner tape was old and dryed out and had grit on it, buy a new camera head cleaning tape for a start, never rewind it as lots of folk do, if you do that all you do is put the old dirt back on the head.

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Everytime I record a programme and try to play it, the picture jumps throught. I cannot find a tracking button, is there one?

No, it's auto tracking on that model. Check the condition of the tape you are recording on.
If its old it will record in poor quality, also try running a tape head cleaner, a wet one is best.
If that solves the problem for a while, say 3 or 4 plays, then it returns then the tapes are old and probably not usable.
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1 Answer

Flicker on playback

Could be tracking, dirty / faulty heads, or mis-alligned guide rollers.

First,adjust the tracking on the player during playback. This is done by pressing P+ or P- on the remote control.

If this doesn't work, use a video head cleaner. This consists of a video cassette and fluid. Follow the instructions with the cleaner.

If this still doesn't help, and you are confident in opening up the VR550, you could cleaner the heads manually.

Disconnect from the mains.

Remove the screws from the back and sides of the VCR.
Gently ease the lid off the machine.
Locate the large silver coloured head drum towards the back of the machine. There are four small receptors around the side of the drum. These are the video heads.
Take a small piece of clean white paper about 1.5 inches square. (Copier paper)
Hold the paper square over 1 finger and rub each head in turn. Keep the head near the centre of the paper so as not to catch the heads with the edges of the paper.
Check the paper for dirt from the heads.
Reconnect the player and try a tape. If the problem is still there, try cleaning again.

If none of this works, insert a tape NOT recorded on this machine (Mis-alligned rollers affect recording as well as playback) and play. Locate the rollers which guide the tape around the mechanism. Particulary either side of the head drum.

The rollers have adjustments on the top, which can be turned to move the guide up and down slightly. This is a fiddly job, and over adjustment could cause the tape edge to be damaged.
Adjust the rollers to get a clear picture. It is mainly trial and error.

If all fails then the video is probably destined for the skip.

If you need a replacement, , will sell you a VR550 at a very good price.

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My camcorder not playing back

First, try head cleaning by trained technician. Tech will clean manually with cleaning chemical each head to make sure video heads are performing 100%. Otherwise, they will probably quotes you for tracking adjustment. Head cleaning is typically around $25-50. Tracking adjustment might cost you around $100-200 in US depending on service time.

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Picture is jittery and voice is garbled with noise in background

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.

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