Konica Minolta REGIUS 190, Service Manual

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4.3 Troubleshooting for Image Quality
REGIUS MODEL 190 Service Manual Ver.1.00 2004.11.01
3 Faint white lines
(20 to 100 pixels in width)
1) There is a possibility that dust is present
in side the optical unit.
1) Open the small window below the lid of the optical unit (in
the assembled condition, if so required), and clean the
corresponding location on the CY2 mirror with a blower.
(Left positions on the detection tool correspond to left
positions on the CY2 mirror. See the diagram on the
right.)
• If the dust is not removed by cleaning, replace the optical
unit. "
2.6.2 Replacement of Optical Unit, p.76"
2) If multiple lines are visible over the entire
image.
2) There is a possibility that the laser is disturbed and the
optical unit should be replaced. " 2.6.2 Replacement of
Optical Unit, p.76"
4
Faint black lines
1) Lines disappear when exposure is per-
formed without correction.
1) Irregularity correction was carried out while the CY2 mir-
ror was contaminated; accordingly, this correction should
be repeated.
2) The black lines are replaced by white
lines when exposure is performed with-
out correction.
2) This situation should be resolved as described in 5-3
above.
3) If this does not resolve the problem; 3) There is a possibility that either the laser is disturbed or
ghosting is taking place; accordingly, the optical unit
should be replaced. "
2.6.2 Replacement of Optical Unit,
p.76"
Phenomena Cause/Remedy
Clean this surface (SY2 Mirror)
Window for cleaning