Ricoh Mo-C1, Service Manual, Page: 196 / 1052

3. In cases where 0.5 mm bands occur in halftone areas of uneven density, switch to Photo/Text
mode (or Text mode) so banding does not stand out. Inconsistencies in the optical properties across
the CIS can cause slight unevenness in image density.
4. The thickness of fine lines (0.1 mm or less), or the lines in enlarged copies of originals previously
reduced, may look different in the copies compared with the originals. This is because of a
phenomenon unique to digital copiers: the position of the elements in the CIS unit and position of
the fine lines in the original may not be consistent.
5. If a dirty background still appears in a copy using the Auto Density setting, adjust the notch to a
lighter setting.
CIS
1. Always handle the CIS unit carefully during its removal to prevent it from shock and vibration.
2. Never touch the CIS lenses with bare hands or fingers.
3. Use only lens paper to clean the lenses.
4. Never attempt to disconnect the signal or power connectors from the CIS unit. This could damage
the CIS unit or throw it out of adjustment. When connecting the CIS unit, connect the FFCs at the
SIB.
Electrical Components
1. Make sure that all terminal connections are grounded. The ground wire on the terminal of the
electrical power cord must be properly grounded.
2. All of the ground harnesses that are connected to the back of the scanner unit and the PCB box
should remain connected while the machine is operating.
Adjustments at Machine Installation
1. Avoid placing the machine near a window to prevent sunlight from entering the machine and
causing problems in images like uneven density.
2. The back of the scanner unit should never be exposed to strong light.
3. If the windows near the machine are provided with blinds or curtains, close them.
4. Replacement and Adjustment
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