EN
Power Supply System
5-11
The Scanner Motor is controlled and monitored by the DC Controller
Board. It rotates the scanner mirror during the Initial Rotation period
and the print period.
The fan motor is a two-phase, four-pole DC brushless motor
containing a hall element and forms a unit along with the motor drive
circuit.
When the printer turns on, the CPU (IC301) on the DC controller PCA
makes pin 99 (/HALFFAN) “H” and runs the fan motor half a turn.
The CPU controls the half-speed/full-speed rotations according to the
target fixing roller temperature when the CPU receives the /PRNT
signal from the video controller PCA. When the fixing unit warms up
sufficiently, it makes pin 99 (/HALFFAN) “H” to set the fan drive
voltage (FANON) to the voltage level to run the fan motor at full
speed. If the printing ends, the fan motor is run at full speed for 30
seconds after the main motor stops, then the fan motor runs at half
speed.
