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Pickup/feed system
The pickup/feed system, being comprised of various feed rollers, picks up and feeds a sheet
of paper.
This printer has two pickup trays (the Tray 2 (cassette) and the Tray 1 (multipurpose), and
two delivery trays (the face-down tray and the face-up tray).
The Tray 1 (multipurpose tray) paper sensor (PS1) detects the presence of paper on the
Tray 1 (multipurpose tray) and the Tray 2 (cassette) paper sensor (PS2), and detects the
presence of paper in Tray 2.
The DC controller controls three motors (feed motor: M1, delivery motor: M2, drum motor:
M3) and four solenoids (SL1, SL2, SL4, SL5) to drive each feed motor. (SL5 is only for the
3700 printer.)
There are 6 photo interrupters (PS4, PS6, PS7, PS8, PS9, PS10) along the paper path to
monitor the arrival or passing of papers. (PS9 and PS10 are only for the 3700 printer.)
Duplex printing is available only on the 3700 printer.
Figure 5-57. Pickup/feed system illustrates the motors, solenoids, switches, and sensors.
182 Chapter 5 Theory of operation ENWW