Konica Minolta bizhub 500 Service Manual page 127

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D. Drum cooling fan (FM4) control

Cool around the drum and the toner bottle with suction air.

(2) ON timing

After completion of the print, it turns ON a specified period of time after the drum motor (M1) turns OFF.

It turns ON when the machine inside temperature goes over the prescribed temperature.

(3) OFF timing

It turns OFF a specified period of time after it turns ON after completion of the print.

While it turns ON after completion of the print, it turns OFF the moment M1 turns ON.

It turns OFF when the machine inside temperature goes down below the prescribed temperature.

E. Conveyance suction fan (FM5) control

Exhaust by sucking air around the conveyance path between the drum and the fusing unit, and stabilize the

conveyability of paper and remove exhaust heat and ozone at the same time.

(2) ON timing

It turns ON in synch with the turn-ON of the drum motor (M1).

While in the low power mode and the stand-by condition, it turns ON in synch with the turn-ON of the drum

cooling fan (FM4).

(3) OFF timing

While in the initial charging and the TCR adjustment mode, it turns OFF in synch with the turn-OFF of M1.

In cases other than the above, it turns OFF a specified period of time after M1 turns OFF.

While in the low power mode and the stand-by condition, it turns OFF in synch with the turn-OFF of FM4.

Developing suction fan (FM6) control

Suck air from the underside of the developing unit to prevent the splash of toner and exhaust air.

(2) ON timing

It turns ON in synch with the turn-ON of the developing motor (M3).

(3) OFF timing

It turns OFF a specified period of time after M3 turns OFF.

While in the TCR adjustment mode, it turns OFF in synch with the turn-OFF of M3.

Theory of Operation Ver1.0 Feb.2006

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