Ricoh FT4460, Service Manual, Page: 395 / 413

28 February 1989
5.6 LOW IMAGE DENSITY WITH RED ORIGINALS
- Phenomenon -
The image density is low in copies of red originals.
- Explanation -
This copier uses an OPC drum, which has higher spectrosensitivity in red
areas than a selinium (F type) drum. Instruct the user to make copies at
manual image density level 2.
5.7 LOW ID LEVEL WITH MULTIPLE SOLID COLOR COPIES
- Phenomenon -
Low image density occurs when multiple copies are made of color
originals with heavy solid areas.
- Explanation -
Explain that this rapidly depletes the color toner in the development unit.
Instruct the user to limit the number of such copies in multi-copy runs.
Or, if many copies are needed, instruct the user to do so one copy at a
time; this is because the fixed supply mode is used to supply toner.
5.8 MODES CLEARED WHEN FRONT COVER OPENED
- Phenomenon -
When the front cover is opened, the front cover safety switch is turned off
and the DC power supply is shut off. This clears everything on the
operation panel except in the case when the Toner End indicator or the
Check Paper Path indicator is on. In this case, after the door is opened
and closed, all the precious settings will be displayed on the operation
panel.
- Explanation -
Instruct the user not to open the front cover except to replace toner or
clear paper misfeeds.
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