Paper Size Detection - Oki B930 Service Manual

(2) Home Position Switch
Detects the coupling of the HCF with the IOT. The OFF state of this switch indicates that the HCF
is separated from the IOT. In this case, transfer of paper is inhibited.
(3) Tray In Sensor
Detects insertion of the Tray into the HCF. This sensor turns ON when the Tray is properly
inserted. While it is OFF, paper feeding from the Tray is inhibited.

Paper Size Detection

Paper size is automatically detected by loading paper in the Tray and by the GUIDE ASSY SIDE
R that is attached to the Tray and aligned with the side of paper. The position of the GUIDE
ASSY SIDE R is detected by the HCF Size Sensor R and the HCF Size Sensor L.
NOTE Detectable paper size and sensor level pattern are as follows:
Table 1: Paper Size
B5L
7.25" x 10.5" L
8.5" x 11" L
A4L
(Note: B5L and 7.25" x 10.5" L can be switched by the NVM.)
Detection of paper size is carried out during the startup procedure, and when a specified time
has passed from the Tray In Sensor level change "OFF to ON" with the Tray inserted. Paper size
is also detected at every constant time. When the same size has been detected a specified times
consecutively, the size of paper loaded in the Tray is determined.
If a sensor level pattern does not match any of those in the above table, paper size cannot be
determined. In this case, though the Tray is lifted, print start by feeding paper from the Tray is
inhibited.
Function of the sensor used for paper size detection
The following outlines the function of the sensor used for detecting paper size.
(1) Size Sensors
Table 2: HCF Size
Sensor R
OFF
ON
OFF
HCF Size Sensor R
Table 3: HCF Size
Sensor L
OFF
OFF
ON
HCF Size Sensor L
GUIDE ASSY
SIDE R
FI6M007A1
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