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4.3 Troubleshooting for Image Quality
REGIUS MODEL 190 Service Manual Ver.1.00 2004.11.01
4.3.6 Case 5: Vertical Lines
Phenomena Cause/Remedy
1 Sharp white lines
(5 to 10 pixels in width)
1) If there are horizontal scratches on the
plate;
1)Replace the plate.
2) If dust has collected on the edge of the
optical unit's beam-condensing section
and the laser is disturbed;
2) Blow clean the edge of the optical unit's beam-condens-
ing section. At this time, visually check whether dust is
present between the excitation light's cut filter and the
condensing mirror, and then perform blower cleaning and
confirm that the dust has been removed. Note that the
location of dust adherence can be estimated from the
position of the vertical lines in the image. (The service
tool's left side corresponds to the right side of the con-
densing mirror.
2 Sharp black lines
(5 to 10 pixels in width)
1) Lines disappear when exposure is per-
formed without correction.
1) Redo irregularity correction using a plate which is free of
scratches. If vertical, localized black stripes occur in low
dosage images as in the diagram on the right and they do
not re-appear in high-dosage images;
2) This defect is caused if irregularity cor-
rection is carried out when either the
plate is scratched or when dust is present
on the edge of the optical unit's beam
condensing section.
2) Excitation light is leaking and the optical unit should be
replaced. "2.6.2 Replacement of Optical Unit, p.76"
Cut Filter for Exitation Light
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