User Guide

NOTE This test is especially important if refilled print cartridges have been used.
1. Open the print-cartridge door.
2. Remove the print cartridge.
3. Mark the drive gear on the cartridge with a felt-tipped marker. Note the position of the mark.
4. Install the print cartridge and close the print-cartridge door. The startup sequence should rotate the
drum enough to move the mark.
5. Open the print-cartridge door and inspect the gear that was marked in step 3. Verify that the mark
moved.
If the mark did not move, inspect the main drive assembly to make sure that it is meshing with the print-
cartridge gears. If the drive gears appear functional and the drum does not move, replace the print
cartridge.
High-voltage contacts check
The high-voltage contacts in the device must have a good connection with the contacts on the print
cartridge to provide the necessary voltages for the image-formation processes.
To check the print-cartridge contacts
Remove the print cartridge and visually inspect the three connection points (callout 1) on the end of the
print cartridge. If they are dirty or corroded, clean the connection. If they are damaged, replace the print
cartridge.
NOTE Use only isopropyl alcohol to clean the connections.
Figure 7-7 Print-cartridge high-voltage contacts
ENWW Functional checks 137