Oce 3121, Техническое и сервисное руководство

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ed.1 Image quality 11
The copy has vertical lines of background
The copy has black lines. (vertical, thick, fuzzy)
The copy has black lines. (vertical, thick, fuzzy)
Cause Step Checks Y/N Action
Charging roller 1 Clean the charging roller in user
mode. Is the problem solved? Yes End.
Scanner (dirty) 2 Clean the mirror, the lens and the
exposure aperture. Is the prob-
lem solved? Yes End.
Developing unit 3 Is there an even coating of toner
on the developing roller? No
■
Check the edge of the
doctor blade.
■
Wipe the surface of the
developing roller, until
it is dry.
OPC 4 Are there scratches on the OPC,
in the peripheral direction. Yes Replace the OPC unit.
Light (intrusion) No Check whether the OPC
is being subjected to
exposure from an out-
side source.
Cause Step Checks Y/N Action
Laser exposure
system 1 Make a test copy, using (‘ * 4 * ‘
), ‘ L-TEST2 ‘ in service mode.
Does the copy have black lines? No The scanner system may
be faulty.
Clean the mirrors 1 to 3.
Charging roller 2 Clean the charging roller in user
mode. Is the problem solved? Yes End.
OPC 3 Are there scratches on the OPC,
in the peripheral direction.
■
Try wiping the black lines (if
visible) from the OPC, using a
cloth coated with toner. Check
whether the copies no longer
have black lines.
Yes Replace the OPC unit.
■
If there are scratches,
check to find the cause.
Fusing unit 4 Are there any scratches or black
lines on the surface of the fixing
film? In peripheral direction? Yes Replace the fuser unit.
No Check that there is no dirt
in the entry of the fuser
unit.