Panasonic FP-D250 User Manual page 54

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2) Supplying toner

The Toner Hopper Unit supplies toner to the Developer Mixing Unit via the

Reserve Tank. Toner addition is done in two stages, by turning the Toner Hopper

Forward Direction:

The bottle turns (via a spring clutch) to supply toner from the Toner Bottle to

the Reserve Tank. This direction is controlled by the Toner Volume Sensor.

Reverse Direction:

The Toner Supply Roller turns (via a spring clutch) to supply toner from the

Reserve Tank to the Developer Mixing Unit. This direction is controlled by the

TDC sensor output Toner volume Hopper

High (Lower toner density)

Non detect Forward rotation Rotate

Low (Higher toner density)

• Toner supplied by the toner supply roller varies from 0.4 to 1.2 grams of toner

depending toner density.

• When the developer mixing unit is separated from the toner supply unit of the

toner hopper, the toner supply shutter is closed to prevent accidental toner

Toner supply Add toner

Reverse rotation

Supply toner to developer unit

Supply toner to sub-hopper

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