Take a another cassette ,remove all 5 screws before open 2 sides turn over the cassette to drop all screws and open carefully .
1.You can see one plastic plate with small spring in between two plastic tape reel locks.
2.And see the tape safety door locking lever and small spring.
3.See small two metal rollers to guide tape
By studying this you will be able to fix any of video cassette
Jagath
December 2008