EN Chapter 5 Theory of operation 103
The main motor is a DC brushless motor with hall elements, and is unified with the motor drive
circuit.
The CPU (IC502) sets the main motor drive signal (/MON) to “L” and rotates the main motor. When
the main motor rotates and reaches the specified speed, the main motor sets the main motor ready
signal (/MRDY) to "L". When the /MRDY signal is "L," the CPU determines that the main motor is
rotating correctly.
Note When the printer is idle, the main motor comes on every seven hours for 500 milliseconds.
If the printer is in the following conditions, the CPU determines a main motor failure.
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The /MRDY signal does not go to "L" after 700 ms from the main motor rotation start.
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During normal rotation, the /MRDY signal goes to "H" continuously for 0.1 second after going to
"L".
The scanner motor is controlled and monitored by the engine controller board. It rotates the scanner
mirror during the initial rotation period and the print period.
The fan motor is controlled and monitored by the engine controller board. The fan operates at full
speed during the printing modes. During the wait period after the power is on, the fan motor prevents
the temperature from rising in the printer.
Note While in idle or PowerSave mode, the fan motor comes on every 14 minutes and stays on for 6 minutes
to cool the heat generated by the engine controller board and the power supply.
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