Control - Konica Minolta magicolor 5550 Service Manual

22. Miscellaneous
22.1.3

Control

A. DC power supply fan motor control
<Full speed rotation conditions>
• For the period of time that begins when the warm-up cycle is started and ends when a
predetermined period of time elapses after the warm-up cycle has been completed.
• For the period of time that begins when a print cycle starts and ends when a predeter-
mined period of time elapses after the print cycle has been completed.
• For the period of time during when the fusing pressure roller deformation prevention con-
trol is performed under the power save mode.
• For the period of time when the thermistor/3 provided in the print head detects the tem-
perature of 42 degrees or more.
<Half speed rotation conditions>
• The motor runs at a half speed during any time other than above.
• The motor runs at a half speed only when printing in monochrome mode without a duplex
option, optional lower feed unit or staple finisher.
<Stop conditions>
• Stopped in the power save mode. The motor is, however, run while the ozone ventilation
fan motor is running and stopped after the ozone ventilation fan motor has been stopped.
At this time, the motor is run at full speed for a predetermined period of time after the
intermediate transport motor has been stopped and is run at half speed thereafter.
<Forced stop condition>
• A malfunction occurs, but not when an error occurs.
B. Fusing fan motor control
<Full speed rotation conditions>
• For the period of time that begins when a print cycle starts and ends when a predeter-
mined period of time elapses after the print cycle has been completed.
• For the period of time when the thermistor/3 (TH3) provided in the print head detects the
temperature of 42 degrees or more.
<Half speed rotation conditions>
• The motor runs at a half speed during any time other than above.
• The door is opened during the warm up cycle. However, the motor does not run at a half
speed when image stabilization sequence is being executed even if a door is opened
during the warm up cycle.
<Stop conditions>
• Stopped in the power save mode. However, the motor is not stopped for a predetermined
period of time after a print cycle has been completed.
• The temperature of the heating roller is below the specified one.
<Forced stop condition>
• For the period of time that begins when the warm-up cycle is started and ends when the
warm-up cycle is complete.
• A malfunction occurs, but not when an error occurs.
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Theory of operation Ver. 1.0 Nov. 2006