Gestetner A294 Service Manual page 117

Rev. 02/2000
Toner Hopper Empty Detection
The toner hopper sensor [A] detects whether there is enough toner in the toner
hopper. The toner hopper sensor checks for toner once when the toner supply
roller clutch turns on. When there is only a small amount of toner inside the toner
hopper and pressure on the toner hopper sensor becomes low, the toner hopper
sensor outputs a pulse signal (once per copy). Then the toner bank mechanism
supplies more toner to the toner hopper, as explained in previous sections.
Spring [B] applies development bias from the developer rollers to the lower case of
the developer unit, to prevent toner from being re-attracted back to the drum.
SM
CÓPIA NÃO CONTROLADA
[B]
2-67
CÓPIA NÃO CONTROLADA
TONER SUPPLY AND RECYCLING
[A]
A294D307.WMF
A294/A295