User Guide

Two loop sensors located between the fuser sleeve and the ITB detect the paper loop. Accordingly the
DC controller controls the rotational speed of the fuser motor to keep the loop amount properly.
●
Loop sensor 1: Detects the paper loop for heavy media
●
Loop sensor 2: Detects the paper loop for plain media other than heavy media
Figure 1-42 Loop control
Pressure roller
DC controller
M5
Loop sensor1
Loop sensor2
Sensor flag for heavy paper
Sensor flag for other than heavy paper
Fuser motor
Speed of fuser motor
OFF
ON
ON
OFF
OFF
ON
Speed down
Heavy media: Speed up
Other media: Speed down
Speed up
A
B
C
Pressure roller
ITB
<A>
<B>
<C>
PS7
PS8
Small-loop
Large-loop
(heavy media)
Large-loop
(other than heavy media)
Loop sensor1
Loop sensor2
Illus.
Fuser sleeve
Fuser sleeve
60 Chapter 1 Theory of operation ENWW