Skew Detection - Fujitsu DL7600 Maintenance Manual

5.2.1.6 Skew detection

Skew is detected by two sensors provided on the card guide in the carriage unit when a cut sheet is loaded.
The card guide has two sensors: TOFL and TOFR. If a detection difference between the two sensors when the
top end of paper passes them is too large, paper is ejected to the front.
Skew detection is valid only when a cut sheet is fed manually. It is invalid when a cut sheet is fed from the CSF
(front or rear) or continuous forms are fed.
TOFL
TOFR
Card guide ASY
Figure 5.9 APTC sensor structure
144