HP LaserJet 1010 Service Manual - Page 117

Drum rotation functional check, High-voltage contacts check, To check the print cartridge contacts

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Note Note Drum rotation functional check The photosensitive drum, located in the print cartridge, must rotate for the print process to work. The photosensitive drum receives its drive from the main motor through a system of gears on the right side of the printer. 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 drive shaft that moves into the print cartridge area when the access door is closed to make sure that it is meshing with the print cartridge. If the drive shaft looks functional and the drum does not move, replace the print cartridge. If the drive shaft is damaged, replace the printer. High-voltage contacts check The high-voltage contacts in the printer must have a good connection with the contacts on the print cartridge to provide the necessary voltages for the electrophotographic processes. To check the print cartridge contacts Remove the print cartridge and visually inspect the three connection points on the end of the print cartridge. If they are dirty or corroded, clean the connection. If they are damaged, replace the print cartridge. Use a dry cloth to clean the connections. ENWW Functional checks 105

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Drum rotation functional check
The photosensitive drum, located in the print cartridge, must rotate for the print process to
work. The photosensitive drum receives its drive from the main motor through a system of
gears on the right side of the printer.
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 drive shaft that moves into the print cartridge area when
the access door is closed to make sure that it is meshing with the print cartridge. If the drive
shaft looks functional and the drum does not move, replace the print cartridge. If the drive
shaft is damaged, replace the printer.
High-voltage contacts check
The high-voltage contacts in the printer must have a good connection with the contacts on
the print cartridge to provide the necessary voltages for the electrophotographic processes.
To check the print cartridge contacts
Remove the print cartridge and visually inspect the three connection points 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 a dry cloth to clean the connections.
ENWW
Functional checks
105