Fuji Xerox DocuPrint M355df Service Manual page 146

Step
Check the drum charge status.
Cover the ROS ASSY window with a sheet of paper and per-
9 form a test print.
Is the test print result black?
(If the drum is charged correctly, the test print result is white.)
Check the ROS ASSY.
Cover the half of the ROS ASSY window with a sheet of paper
and perform a test print.
10 Is the half page of the test print result white and the other half
page is black?
(If the ROS is normal, the other half page is not black but test
patterned.)
Chapter 3 Image Quality Troubleshooting
Check and Action
3-17
3.2 Image Quality Troubleshooting
Yes
Replace the
HVPS. (REP
18.3)
Replace the
ROS ASSY.
(REP 2.1)
No
Go to step 10.
Replace the
printer.