Oce 7050, Техническое и сервисное руководство, Страница: 108 / 275

ed. 6 05 Developing 501
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001
Functional description
1 Toner supply
When the toner level is low, the toner supply motor 05M1 feeds toner. During
toner dosing, the toner supply switch 05S1 detects if there is still sufficient ton-
er.
The toner concentration sensor 05B1 is cleaned by a cleaning flap.
The toner supply switch 05S1 is a reed switch inside the toner feed unit. When
the toner supply motor 05M1 rotates, a flap inside the toner feed unit also ro-
tates. A magnet is mounted on this flap. When there is sufficient toner, the flap
is moved upwards by the resistance of the toner. In that case the magnet does
not energize the toner supply switch 05S1. When the toner level gets low, the
flap falls down because there is no more toner to resist it. The magnet then en-
ergizes the toner supply switch 05S1 and the “add toner” message appears.
05B1
23M1
05M1
05S1
developing unit toner feed unit
22PBA01
DEVSUPM
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DEVSUPSW
22PBA05
DEVCONS
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A