Olivetti DR N17, Service Manual, Page: 345 / 558

687200Q Service Manual 7-97
7.5.11 Extraneous Marks
Procedure
1 The customer has changed the host software or configurations.
Y: The customer will have to reconfigure the system.
N: Go to step 2.
2 Extraneous marks can be caused by bad font data from the host. Ask the customer to download
different fonts from the host. The problem is solved.
Y: Go to Final Actions.
N: Go to step 3.
3 Generate several System Controller Test Prints. The print job exhibits the extraneous markings.
Y: Check the Laser Assembly and EP Cartridge grounds for damage or contamination.
N: Go to step 4.
4 Open the Front Cover and visually inspect the left drum grounding plate on the EP Cartridge and
the left drum support. They are free of damage and contamination.
Y: Go to step 5.
N: Repair or replace the grounding spring or the EP Cartridge if necessary.
5 Disconnect the host interface cable. Attempt to generate a test print. The test print is free from
defects.
Y: Go to step 6.
N: Replace the System Controller, then replace the Printer Engine Controller.
6 Check for a problem with the host interface cable. Ensure that the host interface cable meets
specifications. The cable is within the maximum length.
• Parallel: 10 ft. (3.0 meters)
Y: If the problem persists, go to RAP 7.4.4 Erratic Operation.
N: Ask the customer to provide a cable of proper length.
Definition
Horizontal or vertical bands, or other marks that are print defects caused by
bad or incorrect font data, print drivers, electrical noise or other causes not
directly related to the electrophotographic process.
SAS2104