1-46 Service Manual
5055-01X
Duplex Unit
A duplex unit can be optionally installed in the main unit, allowing
two-sided printing.
Selecting Paper feeding, Registration, Transfer, Separation, Fusing,
or Face-Down paper discharging with the pulse motor in the duplex
unit, feeding is stopped before the paper is delivered. Paper delivery
is then reversed and fed to the duplex unit.
Paper fed with the duplex unit stops once, and the center position is
corrected by the operation of the side guide plate. Paper is then re-
fed by the printer controller signal to the main unit, and, following
printing on the back side, is delivered to the normal feeding path.
When non-offset type color toner is used, the process speed in the
OHP mode is decreased, causing toner to melt sufficiently with the
fusing unit, while the fusing temperature is set higher than usual to
increase the smoothness on the surface of the toner image.
This mode restricts paper feeding to multipaper feeding, not cassette
feeding.
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