Removing a Falcon 5 speed model 180cassette

No one can tell you without inspecting recorder. I would try another cassette for the answer.

you need a chain whip tool and cassette locking tool, the chain whip wraps around one of the cassette to hold it still, the locking tool fits onto a wrench or ratchet and you insert inside the center of the freehub, so with one hand hold the cassette still and the other hand loosen the lock ring and unscrew, the cassete then comes of the freehub.

First thing, count how many cogs you have, and then make sure the PowerTap hub cassette body (what the cassette slides onto) is made for that cassette. Some older hubs have cassette bodies made for fewer cogs. If it is the proper body for your cassette, make sure there isn't a spacer that is too thick underneath the cogset.
What is probably happening is that the cassette is out further than the outermost locknut on the axle and it's just coming against the frame as you torque the QR down.

Cassettes fit on a spline with a lock nut to keep them there, the spline is also the ratchet.
Older bikes had a ratchet/sprocket assembly which screwed onto a threaded hub

I know the Shimano Mega9 front and rear derailleurs work with 8 speed drivetrains, provided you are using the correct shifters.

I went to local bike shop where the mechanic who shoved a cassette removal tool into the spline and turned it out. Turns out the bike was originally manufactured as a 6, rather than a 5 speed.

I got the solution from your net only.Thanks it is wotking presently.you have to do simply take out the cassete and keepp the cassete door open.And then take both the battery out i,e one main battery and another small battery and leave camera in this psoition for two hrs and tehn place back battery in its position and then load cassete .It will work.I have tested it.Thanks a lot.

BK PRASAD

What do you mean by "not able to play my VCR with some cassettes. " Is it that some tapes do not display images? No Video? From your name it seems that you are from India, Assuming that to be so, I also presume that you must be possesing a Multi-System VCR, to play back PAL Tapes from India, and NTSC tapes from the US. And if that is the case, I guess it is a simple problem of resetting the System standards. Please go to the Main menu of your VCR using the Remote, and select AUTO in System (You will be given choices of AUTO, PAL, NTSC 3.58, NTSC 4.43 and NTSC PB PAL. Likewise, it is entirely possible that your Television SYSTEm Standard has been accidentally changed. If it is Multi System TV, Then, again, using the Remote of the TV, select Menu, and then select AUTO in System. In all likelihood your problem should get solved.