I have a paper shredder and I can't find the manual online for it. I need to take it apart.

In order to maintain a functional paper shredder, you should clean it out and oil it at least once a month(depending on usage) if not every time you fill it.
I would advise against trying to disassemble the actual blades to clean them out if that's what you mean by "take it apart."
What you can do is unplug the machine, lay the blades up and get a pair of tweezers and remove any large pieces of paper/shredding that might be caught in there.
After doing that you should oil the blades with any lubricant that your owner's manual recommends.
Most shredders suggest a non-aerosol/biodegradable oil such as vegetable oil.
Do not use WD-40 or other canned spray lubricants.
I've found that dripping the oil straight into the blades can be very messy so a good alternative is to lay out a piece or two of scrap paper and soak it in the oil. Then run the paper through the blades as normal.
They also sell varieties of this here: http://www.staples.com/Staples-Shredder-Lubricant-Sheets-12-pk-Shredder-Sheets/product_602400


It doesn't have to be a headache to maintain but proper care can make your shredder last a long time.

When you say you can't free it...does that mean the shredder wont turn in fwd or reverse,???
If it is totally siezed then you only course of action may be to take it apart and manually turn things by hand to clear the jammed paper.

Normally try to run it in reverse while pulling the paper back out to assist the motor. If it won't even run in reverse then you will have to take it apart to manually clear the jam.

Add some paper shredder oil. A shredder needs oil to function properly, oil should be applied every month or more depending on how often you shred. Learn more here: http://hubpages.com/hub/Paper-Shredder-Oil

There are LED photo sensors in the feed path that detect paper. They can get a build up of paper lint or oil on them. The shredder needs to be taken apart and these need to be cleaned.

I have workrd on shredders for 17 years. you need to spray a light wait oil in to the paper shut. It is a catch 22 paper dust & paper builds up in them and the covers need to come off and be cleaned out or gears start stripping or braking.
good luck

C.W.H. ( typboy)

if not put together with tamper proof screws

take apart is possible to clear sensor area
and internal workings

IS this is an older model
i can find parts for sale on one of these

If you think you have taken all the screws you may not know that most often there will be a hidden screw ot two under a sticker or a plug.It may be that your unit has tabs that simply need to be pulled apart. Unfortunately I only know Fellowes products but maybe this will help. Good Luck.

Your cutters have spread apart this could be caused by overloading machine to many times or something may have cracked internally that held them in place.