HP 1200 Service Manual - Page 153

Drum rotation functional check, Open the printer and inspect the gear that was marked in step 3.

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Note 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. This test is especially important if refilled toner cartridges have been used. 1 Open the printer door. 2 Remove the toner cartridge. 3 Mark the drive gear on the cartridge with a felt-tipped marker. Note the position of the mark. 4 Install the toner cartridge and close the printer door. 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 make sure 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. EN Functional checks 151

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EN
Functional checks
151
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.
Note
This test is especially important if refilled toner cartridges have been
used.
1
Open the printer door.
2
Remove the toner cartridge.
3
Mark the drive gear on the cartridge with a felt-tipped marker.
Note the position of the mark.
4
Install the toner cartridge and close the printer door. 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 make
sure 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.