I have 2 sharp copiers model AL-1631 and each on is printing blank sheets but there is no light on either indicating need for more toner. One has had the toner replaced already and one has not. Any ideas? Many thanks, James

When these Sharp AL series machine just run and run it means they are low or out of toner. This is especially true if you are hearing a light thump thump noise while it is running. Just let it run and after 5 minutes or so it should shut down and then replace toner light should come on. This is the small red light that looks like a stack of 6 dots.
Either replace the toner or have your existing toner refilled.
Good Luck and Thank You for using Fixya.

Was the copier working fine before you changed the cartridge? If so I think your cartridge is the problem. If it started making blank copies right after you changed it. If this is not the case the first thing I would say is it is not the drum. Try opening and closing the right side door. There are contacts in the door that will cause blank copies. I have had several customers do this and it fixed the problem. You can also try pulling out the toner and then pull the drum unit partially out and re-seat it. Then re-install the toner.
Good Luck

You can reset this indicator by pressing these keys in sequence:
Press "C" then press "Exposure Mode" then "C" again then "Exposure Mode" again.
Note that the Exposure Mode key is the far left key on the panel.
One you press these 4 keys in sequence the display should go blank. Then key in 24 as if to make 24 copies. Then press Print (Green Button)
Then key in 7 as if to make 7 copies.
Press print again. You should now get flashing 000.
Turn machine off then back on and the light should be gone.
Here it is in a short version:
C, far left, C, far left, 24, print, 7, print,
then power off and back on.

You can reset this indicator by pressing these keys in sequence:
Press "C" then press "Exposure Mode" then "C" again then "Exposure Mode" again.
Note that the Exposure Mode key is the far left key on the panel.
One you press these 4 keys in sequence the display should go blank. Then key in 24 as if to make 24 copies. Then press Print (Green Button)
Then key in 7 as if to make 7 copies.
Press print again. You should now get flashing 000.
Turn machine off then back on and the light should be gone.
Here it is in a short version:
C, far left, C, far left, 24, print, 7, print,
then power off and back on.

press the following keys in this order:

1. Clear Key (far right key on panel)
2. Exposure Key (far left key on panel)
3. Clear Key (far right key on panel)
4. Exposure Key (far left key on panel)

once the panel goes blank make your display show

• 24 then press your start key
• then 7 press start
• press C one time
• 20 press start
• 1 press start

Then press C until the copier restarts.

Is there any tone in the printer?

There is no code to run.
Did the paper come out as an entire sheet? Or was it torn? There is either a small piece of paper that remains in the machine, or you dislodged a paper switch in removing the jam.

Hi, you can stop a copy half way to see if it image is on the on the drum if not check and make sure toner unit is turning. if not main charge. thanks dale.

Hi, this is most likely caused by a worn or faulty drum.

this noise could be coming from the by-pass , because toner fall down pain in *** to take out. dale