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Service Manual
The paper stacked in the paper cassette is pushed by the feed rolls. This causes the top of the paper
stack to contact them. The feed solenoid
roll assembly. When the feed solenoid is on and the feed rolls rotate, the top sheet of paper is
separated from the others and transported to turn rolls by friction separation.
The turn rolls send the paper supplied at the paper pick-up section (feed rolls) toward the
registration section
disconnects the main motor drive to the turn roll assembly. While the turn solenoid is on and the
turn rolls stop, paper waits before the registration section. This causes through-put up. This printer
is long between paper pick-up position and registration section. If paper pick-up is started by the
trigger of the START (print start) signal, the video controller waits at paper feeding time. This
timing chart is Figure 2-16.
I
Video l/F Signal
Paper Position
Video Controller Job
Total Job Time
This printer fed paper until before registration section before
controller (MC
so that through put up. This printer add
interface.
When the video controller sends
controller (MC
before START (print start) signal of video interface signals, this printer sends
paper to before
sensor sensed position, and holds the sending paper on this position by turn
solenoid on. Then printer starts sending paper and printing when the engine controller (MC
receives START signal. The video controller process printing image between
START signal sending. This timing chart is Figure 2-17.
The
signal used sequence is through put better than no used sequence.
Video l/F Signal
Video Controller Job
Total Job Time
Rev.
roll assembly and
Image processing
Figure 2-16. Printing Timing Chart (1)
Feed) signal of video interface signals to engine
Wait position
Feed
Image processing
Figure 2-17. Printing Timing Chart (2)
or disconnect the main motor drive to the feed
sensor). The turn solenoid connects or
Feed Rolls
Roll
the START signal of engine
Drum
Fuser
Operating Principles
Drum
Feed) signal of video
signal and
Exit
2-9
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