Electrical Operation; Interface With Copier - Ricoh FT7770 Service Manual

30
April, '89

ELECTRICAL OPERATION

1. Interface With Copier

The DF has its own CPU which controls all of the DF functions. The DF
communicates with the copier through a serial interface bus.
are used for the serial interface bus because they are unaffected by electri-
cal noise.
Two dc power levels, +5
the copier and are used for all dc components.
and +24 volts, are supplied from
volts
7-24
Fiber optics