B140 Series - Ricoh B064 Service Manual

B140 Series

This mechanism makes sure that the hot roller and pressure roller touch only when
the machine makes copies. This prevents distortion of the pressure roller.
While the machine is turned on:
• The fusing pressure release motor [1] comes on and turns the cams [2] until the
cam position actuator [3] is at the home position. This turns the cams down and
pushes the pressure arms [4] below the ends of the pressure roller [5].
• This expands the heavy springs [6] and pulls the pressure roller away from the
hot roller [7].
When a job starts:
• The pressure release motor turns on.
• The vertical worm gear [8] turns the sequence of gears [9], and this turns the
cam shaft [10].
• The cam shaft turns the actuator into the gap in the fusing pressure release HP
sensor [11].
• The actuator goes out of the gap in the fusing pressure release HP sensor when
the cam is in the 'up' position. This turns the motor off. This lets the heavy
springs pull the pressure roller against the hot roller.
When the job ends and the machine goes back to the ready condition:
• The pressure release motor comes on again and turns the cams to the 'down'
position. This pulls the pressure roller away from the hot roller.
• When the cams are in the 'down' position again, and the actuator goes out of the
gap, the sensor turns the motor off.
At paper jam or SC error:
• The pressure roller is again pulled away from the hot roller.
SM
9
1
8
11
3
6-117
IMAGE FUSING AND PAPER EXIT
7
5
6
4
2
B140D002.WMF
B064 Series/B140 Series/G126
10