Function Of Major Components - Xerox DOCUPRINT N17 Service Manual

12.4 Function of Major Components

The Xerox N17 HCF is a bottom mounted cabinet feeding device which delivers paper on demand to the
printers paper transport system. The HCF and the printer communicate via a custom port, where the HCF
receives its feed signals, and where the HCF informs the printer of status and paper size. The HCF de-
rives its power from its own internal auto-ranging power supply. Printer AC power is daisy-linked from the
HCF.
The function of the major components constituting the High Capacity Feeder is described below.
12.4.1 Function
The HCF:
1) Cabinet mount HCF (left side storage, right side feeder).
2) HCF slides in and out of cabinet on drawer slides.
3) HCF is adjustable to four paper sizes (Letter, A4, Folio, Legal).
4) HCF status/command signals are communicated through the 500 sheet interface connector.
Drawer Switches
This set of microswitches, located at the upper rear corner of the left side frame, acts as Tray Ready
Switch and Elevator Interlock Switch. They are actuated by closing the front drawer of the HCF. When the
drawer is closed, the switches are actuated allowing operation of the HCF to occur. When the drawer is
open and the Tray Ready Switch is deactuated, the printer UI will display Lower 2 out (or Lower 1 out).
When the drawer is open and the Elevator Interlock Switch is deactuated, the elevator will lower until the
drawer is closed or the Down Limit Switch is actuated.
Opening the drawer during operation of the HCF may result in jams, as the opening of the Elevator Inter-
lock Switch causes the tray to go down. In addition, due to the fact that the paper path is located at the
front of the printer, opening the drawer will interrupt the paper path.
Deck One Switch
This plunger switch, located on the top surface of the cabinet, is actuated only when the 500 Sheet Feeder
is placed on the cabinet. This switch is used to increase the feed time of the High Capacity Feeder when
a 500 Sheet Feeder is added to the printing system.
Elevator Up
This microswitch, located on the upper front portion of the left side frame, is actuated by the feed roller
shaft assembly and provides upper limit sensing of the elevator/paper stack. When the feeder drawer is
closed, the elevator/paper stack rises until the paper stack lifts the feed rolls and deactuates the Elevator
Up Switch. As paper is fed to the printer, the paper stack height decreases. When the paper stack de-
creases enough to allow the feed roll assembly to actuate the Elevator Up Switch, the elevator will index
up keeping the paper stack at the proper feed height.
Xerox DocuPrint N17 Service Manual
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12-23 High Capacity Feeder Option