Ricoh FT4460, Service Manual, Page: 169 / 413

28 February 1989
2.13 OTHERS
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If the toner density of a solid area decreases, shift the ID sensor bias level
to ‘2’ or ‘3’ using SP#33.
When installing a new system control board, remove the RAM from the old
main board. Reinstall the old RAM on the system control board if the old
RAM is not faulty.
When replacing a sensor, do not overtighten the screw. If the screw is
overtightened, the sensor may be damaged.
If red portions of the original are not showing up on the copy and the cus-
tomer requests this, increase the image density. (Press the manual image
density key.)
Do not make more than one solid color copy at a time, otherwise the
toner supply will run out quickly. Use the one-to-one copy process.
In Photo mode, the image density level can not be increased by more
than one gradation over that image density level used in normal mode.
Shift the photo mode image density level using SP#40.
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