Paper Size Detection - Develop QC 2235 Plus Service Manual

QC 2235plus Theory of Operation Ver.1.0 Mar. 2004
3.3

Paper size detection

• When the Trailing Edge Stop of the drawer is moved, the circular plate located on the bot-
tom of the drawer turns, allowing the four FD Paper Size Sensors on the FD Paper Size
Detection Board.
• Moving the Edge Guide activates or deactivates the two CD Paper Size Sensors through
the cutout in the lever.
• The combination of the four FD Paper Size Sensors and two CD Paper Size Sensors that
are either activated or deactivated determines the size of the paper loaded in the drawer.
• The Tray Set Sensor detects that the drawer is slid into position as it is slid in.
Length Detection
FD Paper Size Detection Board
(PWB-I3 PF, PWB-I4 PF)
Width Detection
Lift-up Motor
(PC114-PF, PC123-PF)
FD Paper Size Sensors
Tray Set Sensor
(PC122-PF, PC-121-PF)
CD Paper Size Sensor 2
(PC119-PF, PC128-PF)
2-5
Mechanical operations
Circular Plate
CD Paper Size Sensor 1
(PC118-PF, PC127-PF)