EXP Computer C4077-90960 User Manual
Page 312
Drum Rotation Functional Check
The photosensitive drum, located in the toner cartridge, must rotate for the
print process to work. The photosensitive drum receives its drive from the
Main Drive assembly. To verify whether the drum is rotating:
1
Open the top cover.
2
Remove the toner cartridge.
3
Mark the cartridge’s drive gear with a felt-tipped marker. Note the position
of the mark.
4
Install the toner cartridge, and close the top cover. The start-up sequence
should rotate the drum enough to move the mark.
5
Open the printer, 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 ensure that it is meshing with the toner cartridge gears. If the
drive gears appear functional, and the drum does not move, replace the
toner cartridge.
N o t e
This test is especially important if refilled toner cartridges have been used.
7
Troubleshooting
7-75