Pick-Up And Feeding - Canon LBP-1000 Service Manual

CHAPTER 2
B. Pick-up and Feeding
The paper feeder picks up the paper from the cassette installed in the paper feeder and feeds the
paper to the printer. The flow of the paper is as shown below.
The drive force of the paper feeder is transmitted from the main motor (M1001) in the printer via
the gears.
When a print instruction command is input to the engine controller from the video controller,
the main motor and scanner motor in the printer start rotating, and the fixing heater tempera-
ture control starts.
When the following three requirements are met, the paper feeder pick-up solenoid (SL2001)
is turned ON.
1) After the main motor has been driven for 0.5 seconds.
2) After the scanner motor has reached 80% of the specified rotation number.
3) The fixing heater temperature has been brought to the specified temperature by the initial
temperature control, or the specified period of time has elapsed after start of the tempera-
ture control.
As a result, the main motor rotation is transmitted to the pick-up roller, and the pick-up roller
makes one rotation to pick up paper in the cassette. Any excessive sheets are removed by the
separation pad, and a sheet of paper is sent to the printer.
The paper then reaches the registration shutter where its skew is corrected, goes through
transfer, separation, fixing and delivery unit and is delivered to the tray.
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Figure 2-7-2