Konica Minolta BIZHUB 750 Service Manual page 128

26. OTHERS
N. CPU cooling fan (FM20) control
(1) Purpose
To cool down the system control board (SCB) with suction.
(2) ON timing
• While in the print, rotates at a high speed.
• While in the idle, and while in the low power mode and the normal sleep mode, changes over between the
high speed rotation and the low speed rotation according to the temperature detected by the CPU.
(3) OFF timing
While rotating at a low speed, turns OFF when the temperature detected by the CPU gets below the prescribed
temperature.
O. HDD cooling fan (FM21) control
(1) Purpose
To cool down the HD-503 with suction.
(2) ON timing
Turns ON while in the idle and the print.
(3) OFF timing
Turns OFF while in the low power mode and the sleep mode.
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Theory of Operation Ver1.0 Aug.2005