Copystar CS-C2525E. Paper Jam error 91. No paper

bad LSU

A paper jam in the
paper feed section
is indicated during
copying or printing
(no paper feed from
the cassette).
Jam code 11
Paper in the cassette is
extremely curled.
Check if the feed roller is
deformed.
Defective registration sensor.
Check if the feed clutch
malfunctions.
Electrical problem with the
feed clutch
The above is taken from the sm
Also the feed tyre needs cleaned / changing and or cassette springs need stretching !!!

the error means that the size of the original does not match the size in the paper tray. select the tray you want use withe paper select key then make your copies

check all the paper switch it might be out of position or broken

its not really a jam, its the cover you have to play with it on order to lock well.

I’m happy to help further over the phone at https://www.6ya.com/expert/mustafa_06f84c65ab5cc745

Is the jam Physical? (Damaged lead edge where it may have caught some thing)
Is the jam Timing (paper if perfect, it just stopped.)
If it is Physical then you need to look for the obstruction, paper clip, staple, or small piece of paper. Check very carefully, remove any foreign matter and retry.

If it is a timing jam, the start by removing the paper, check inside the the paper feed area for foreign material, fan the paper and carefully reinstall it, making sure it is the right size paper for the paper cassette. if it has movable guides in the tray, be sure they are firmly against the paper on all sides.

Close up the machine and try again.

Hope this helps.
ed

Check for debirs in the unit that could be tripping the jam sensor if not the sensor has gone bad.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edwy_1a56970cf1ea4620

Jam code 70 means: No origional feed. Paper is detected on the doc feedr tray, but when the start button is pushed - the origional don't feed through.

Ok, The Copystar CS-1820 is a Lemon, as an Authorized Independant dealer for Copystar. I can attest to this. This is a common problem from Copystar and their's not much that can be done. Unfornatel they should of stuck to the CS-1810 design they would of been better off/

Step1
Turn the printer off and on to see if it can automatically clear some or all of the jam. Many printers provide an error-code listing on the front panel display for the area where the jam occurred. If your printer shows an error code, be sure and check the printer manual to see if that identifies the area of the printer where the jam occurred. 
Step
2
Turn off the printer. 
Step
3
Remove any paper trays. Inspect them for wrinkled or damaged paper. 
Step
4
Open any other doors that give access to the printer's paper path and to the toner or ink cartridge. 
Step
5
If necessary, remove the toner or ink cartridge. Place it in a bag or away from light to avoid damaging it. 
Step
6
If you find a piece of jammed paper, remove it by holding it with both hands and pulling firmly (see A). The goal is to keep the paper from tearing. If several pieces are jammed together, try pulling out the middle piece first to loosen the jam. 
Step
7
If the paper does tear, try rotating the roller gears manually to free the paper (see B). Don't force anything, though. 
Step
8
Replace the toner or ink cartridge and paper trays, close any doors you opened and turn the printer back on. 
Step
9
If the printer paper jam message still appears, then there is still some paper in the printer. Reinspect the paper path.