FujiFilm CR-IR341 Service Manual page 458

C 1 2
ONTENTS
3.3 Other Image Troubleshooting
White spots or speckles
No. 301
• One pixel or several pixels in one line have a
markedly lower density, so white spots or speckles
are developed.
• Regular patterns of such white spots or speckles
frequently appear.
No. 302 Black spots or speckles
• Black spots or speckles are developed randomly
over the entire image. The black spots come in
various sizes, such as those extending over
several vertical lines, or as small as one line.
009-051-04
05.31.99 FM2460
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CR-IR341 Service Manual
<Probable Causes>
• Electromagnetic noise emitted from the motor,
etc. may be introduced into the image signal.
• Electrostatic or optical noise coming from the IP,
etc.
• Dot defects in the IP.
<Check and Reference>
• Use the virtual image generation mode to isolate
the cause.
"10.10 Setting in Virtual Generation Mode for
Image Signal" in Maintenance Utility
<Probable Cause>
• An IP that has been stored unused outside the
machine for a long period of time (one week or
longer) might have been used without secondary
erasure.
<Check and Reference>
MT - 189
FR1H1868.EPS
FR1H1869.EPS
MT - 189