HP laserjet 3390, 3392 all-in-one Manuale Di Servizio
Functional checks
Drum rotation test
The photosensitive drum, located in the print cartridge, must rotate in order for the print process to work.
The photosensitive drum receives its drive from the main drive assembly.
The photosensitive drum receives its drive from the main drive assembly.
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.
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.
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.
cartridge gears. If the drive gears appear functional and the drum does not move, replace the print
cartridge.
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Chapter 6 Troubleshooting
ENWW