Konica Minolta bizhub 211, Service Manual

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Theory of Operation Ver. 1.0 Apr. 2007 23. Others
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bizhub 163/21
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Composition/Operation
23.1.2 Operation
A. Function
B. Fan control
Motor Name Control Conditions
Fusing cooling
fan motor (FM1)
• A fan motor draws air from the area around the Fusing Unit to the out-
side to prevent the machine interior temperature from running high. In
addition, the fan motor pulls paper being transported up through suc-
tion force to help stabilize paper transport.
• Ozone produced from the PC Drum Charge Corona is absorbed by
the Ozone Filter from the air drawn by a fan motor to the outside.
• The fan motor is turned at full speed during a print cycle and at a
speed reduction during other timings, thereby making the machine
quieter without sacrificing cooling performance.
Power unit cooling
fan motor (FM2)
• A cooling fan motor draws air from the area around the Power Supply
Unit to the outside to prevent the Power Supply Unit temperature from
running high.
• The cooling fan motor is turned at full speed when the Main Motor
turns and at a speed reduction during other timings, thereby making
the machine quieter without sacrificing cooling performance.
Motor Name Control Control Conditions
Fusing cooling
fan motor (FM1)
Full speed
• During a print cycle (full speed rotation after the lapse
of a given period of time after the start of the print
cycle)
Half speed
• Half speed rotation after the lapse of a given period of
time after the end of the print cycle
• Half speed rotation at any timing other than the full
speed and stop control
Stop
• When a malfunction occurs
• When the right door is open
Power unit cooling
fan motor (FM2)
Full speed • When power is turned ON or Sleep is canceled
Stop
• Half speed rotation if the main motor (M1) is deener-
gized after the lapse of a given period of time after the
full speed rotation