Xerox XD or XC Series Copier Drum Light Drum Unit Reset Procedure

The drum light can be reset via the control panel. Especially if your copies were good before the light came on. The drum unit is the cartridge that is located right next to the toner cartridge. Reset the light using the following reset procedure:
To reset the drum light on just about any Xerox XC or XD series copier press the following key's in sequence and as quickly as possible (with 4 seconds for the first 4 keys)
Press "C" then the far left key (exposure mode) then the "C" key then the far left again.
So in other words C, far left, C, far left
If done correctly the display should go blank.
Then key in 24 as if you were going to make 24 copies.
Now press the "print" button
Now key in 7 as if you were making 7 copies
Now press the print button again.
You should now be getting flashing zero's on the display.
Turn the machine off then on again and your drum light should be gone!
You can usually reset this counter at least once to get twice the life out of your drum unit.
Good Luck and Thank You for using Fixya.
WheatlandServices

To reset the drum light on just about any Sharp AL series copier press the following key's in sequence and as quickly as possible (with 4 seconds for the first 4 keys)
Press "C" then the far left key (exposure mode) then the "C" key then the far left again.
So in other words C, far left, C, far left
If done correctly the display should go blank.
Then key in 24 as if you were going to make 24 copies.
Now press the "print" button
Now key in 7 as if you were making 7 copies
Now press the print button again.
You should now be getting flashing zero's on the display.
Turn the machine off then on again and your drum light should be gone!
Good Luck and Thank You for using Fixya.

The H4 code on these machines is almost always a false code. Especially if you have had any power fluctuations or failures.
Here is the text from my tip to solving this problem here on Fixya:
To reset the H3 or H4 condition on just about any Xerox XC or XD series copier press the following key's in sequence and as quickly as possible (with 4 seconds for the first 4 keys)
Press "C" then the far left key (exposure mode) then the "C" key then the far left again.
So in other words C, far left, C, far left
If done correctly the display should go blank.
Now key in 14 as if you were going to make 14 copies.
Now press the print button.
The machine should reset and the code should be gone.
9 times out of 10 this is a false code that pops up due to power surges or noise.
If the code comes back this means you have a heater lamp or thermal fuse (more common) failure in the fusing area and will need service.
This procedure will work on all Xerox XD and XC models.

To reset the H3 or H4 condition on just about any Xerox XC or XD series copier press the following key's in sequence and as quickly as possible (with 4 seconds for the first 4 keys)
Press "C" then the far left key (exposure mode) then the "C" key then the far left again.
So in other words C, far left, C, far left
If done correctly the display should go blank.
Now key in 14 as if you were going to make 14 copies.
Now press the print button.
The machine should reset and the code should be gone.
9 times out of 10 this is a false code that pops up due to power surges or noise.
If the code comes back this means you have a heater lamp or thermal fuse (more common) failure in the fusing area and will need service.
This procedure will work on all Xerox XD and XC models
Good Luck and Thank You for using Fixya