Function Of Auto-Toner Sensor - Toshiba e-STUDIO167 Service Manual

12.5.2

Function of auto-toner sensor

1) Function
- Initialization adjustment function - At the first use of the equipment or when the developer mate-
rial is replaced with a new one.
Automatically adjusts the output value of the auto-toner sensor responding to humidity (input
value to the A/D converter) for the toner density of the new developer material so that it stays in
range of 2.34 to 2.46 V.
- Stabilizing the toner density - During the printing operation
Maintains the toner density to a certain ratio as follows.
Toner is consumed.
o The toner density is lowered.
o Change in the auto-toner sensor output responding to humidity is detected.
o The toner motor is driven.
o Toner is supplied from the toner cartridge to the developer unit.
- Toner-empty detection and recovery:
Detects that there is no toner in the toner cartridge:
The toner motor is driven.
o The auto-toner sensor output does not change.
o The toner density does not change.
o It is determined there is no toner in the cartridge (toner empty).
Recovering from the toner-empty state:
The toner motor is driven.
o Toner is supplied from toner cartridge.
o The auto-toner sensor output changes.
o The toner density returns to normal value.
o The toner-empty state is cleared.
© February 2007 TOSHIBA TEC CORPORATION All rights reserved
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