Hi:
This is an indication that the video heads needs cleaning, you can use a video head cleaner cassette, but for a professional cleaning I recommend your local electronics repair shop.

The tracks on a VHS tape are very fine and put close together. To read them correctly the player has a very delicate tracking system - in your case this system is failing, it loses tracking because the internal oscillator is starting to age and the benchmark frequency it delivers is no longer rock stable so it no longer be synchronized with the signals on the tape. When you FF or RW the system is temporarily disabled and the oscillator turned off so when the tape goes back to normal play and the oscillator is started again it starts at the correct frequency and the tracking is perfectly stable.
There is nothing you can do to fix it permanently - the player would have to be completely overhauled and it's not worth that: for less money you can buy a new one. All you can do is to use it as is. To force a resync every time it happens just do a little manual tracking adjustment with the channel buttons on the remote.

Hi friend,
this is your DVD internal problem. you can correct it. so, please goto you nearest service center.....!





Regards: Rakesh