92 Functional information Q1860-90918
Clutches and sensors
See “Reference diagrams” starting on page 227 for locations of switches, sensors, and clutches.
Printing from Tray 1
The presence of paper in Tray 1 is detected by the Tray 1 paper sensor (PS401).
When the formatter PCA sends the /PRNT (print signal) to the printer, the CPU turns the Tray 1
pickup solenoid (SL404) on within the specified period of time after the main motor (M1) and the
scanner motor start and the printer is ready to print.
This turns the cam on and lifts the middle plate where the paper is loaded. The paper touches
the Tray 1 feed roller. The Tray 1 feed roller rotates a full circle to feed one sheet of paper. Extra
sheets are removed with the separation pad, and only one sheet is fed into the printer as the Tray
1 feed roller rotates.
The paper passes through the registration roller paper sensor (PS403) and stops at the
registration roller that is not turning, momentarily stopping the leading edge of the paper and
correcting its skew. The CPU turns the registration roller clutch (CL405) on within a specified
loop-forming time and feeds the paper through the transfer area, the feed belt, the fuser, and the
delivery unit, and outputs it to the top output bin.
Figure 25. Tray 1 pickup
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