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Q1860-90918 Chapter 5 Functional information 95
Printing from the optional 500-sheet and 250-sheet Trays
There are two kinds of paper feeders: 250-sheet and 500-sheet. The paper feeder operation
sequence is controlled by the feeder control PCA. The feeder control PCA has an 8-bit
microcomputer, and controls the serial communications between the feeder(s) and the
dc controller PCA of the printer. The feeder control PCA drives motors and solenoids with
various commands from the dc controller PCA. The feeder control PCA sends the status of the
paper feeder back to the printer at the same time.
Figure 28. 250-sheet paper feeder
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