Table 1-8 Fuser loop sensors control (continued)
Loop sensor 1 Loop sensor 2 Fuser motor speed
ON OFF Heavy paper: speed up
Other paper: speed down
ON ON Speed up
Pressure roller pressurization and depressurization control
The product releases the pressure roller from the fuser sleeve, except during printing, to prevent
deforming the fuser sleeve and the pressure roller and to facilitate the jam-clearing procedure.
1. The DC controller reverses the fuser motor to rotate the fuser pressure release cam.
2. The pressure roller is pressurized or depressurized depending on the position of the cam.
The DC controller determines a fuser pressure-release mechanism abnormality and notifies the formatter
when it does not sense the fuser pressure-release sensor for a specified period from when it reverses the
fuser motor.
Figure 1-44 Pressure roller pressurization and depressurization control
M4
DC controller
Fuser motor
PS9:
Fuser pressure release sensor
Fuser sleeve
Pressure roller
Fuser pressure release cam
<Pressurized> <Depressurized>
ENWW
Pickup, feed, and delivery system
61
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