Ricoh B089 Service Manual page 542

PAPER SIZE DETECTION
2.2 PAPER SIZE DETECTION
[A]
[B]
B415D504.WMF
The paper size sensor board [B] monitors the paper width. The rear side fence [A]
is connected to the terminal plate. The pattern for each paper width is unique.
Therefore, the copier/printer determines which paper has been placed in the by-
pass tray by the signal output from the board. However, the copier will not
determine the paper length from the by-pass tray hardware (refer to Original Size
Detection in the manual for the base copier for details on how paper length is
determined).
A899/B415 14-4 SM