II-13
4.2 Cassette Feed
When the fixing rollers reach the specified temperature while a cassette with paper is in
the printer, the READY lamp changes from flashing to lighting.
When the engine controller circuit receives PRNT or PRFD signal from the video
controller circuit, the paper feed motor starts rotation. About 0.2 seconds later, the printer
actuates the tray1 pick-up roller solenoid and the pick-up roller makes one rotation.
This feeds paper to the photosensitive drum.
Timing chart for the pick-up one sheet
0.12 sec
1.74 sec
1.38 sec 2.54 sec
Main motor
Paper feed
motor
Registration
sensor
Paper empty
sensor
Pick-up roller
solenoid
Paper ejection
sensor
STBY PRINT STBY
PRNT or PRFD
0.12 sec
Figure 2.19
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