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2-74 Service Manual
5055-01x
Black Line
Black Print
Possible Cause Action
Photodeveloper Drum Clean any dirt from the drum
surface. Replace it if it is scratched.
Fuser Detach Pawl
Fuser Roller Surface
Fuser Thermistor Surface
Remove any toner buildup. Replace
the fuser.
LED Printhead Clean the LED printhead. Print a
blank document. Replace the LED
printhead if a black line appears on
the paper.
Possible Cause Action
High Voltage Unit (HVU) The printed paper has black print. Be
sure the high voltage unit is properly
connected. If the problem remains,
replace the high voltage unit.
Sub-frame If the problem remains, replace the
right sub-frame contacts.
Photodeveloper Drum Set If the problem remains after
replacing the sub-frame, be sure the
drum has clean contacts. If
necessary, replace the drum set.
Service.bk Page 74 Thursday, October 4, 2001 12:20 PM