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©
1999 CANON INC. CANON GP605/605V REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
6-41
CHAPTER 6 IMAGE FORMATION SYSTEM
E. Detecting the Toner Level and Controlling the Toner Supply
Mechanism
Figure 6-406 shows the construction of the toner supply control system.
Figure 6-405
Magnet roller
Toner sensor (TS1; inside the hopper)
Toner cartridge
Toner feeding screw
Toner lower limit sensor
(TS2; inside the hopper)
Toner sensor
(TS3; inside the developing assembly)
Purpose: To keep the toner inside the
hopper to a specific level.
Operation: If the absence of toner is
detected, the toner feeding screw inside
the toner cartridge is rotated to supply the
hopper with toner.
Purpose: To keep the toner inside the developing assembly to a
specific level.
Operation: If the absence of toner is detected, the magnet roller is
rotated to supply the developing assembly with toner.
Purpose: To detect the absence of toner
inside the hopper.
Operation: If the absence of toner is
detected, the ongoing operation is
stopped, and the Add Toner message will
be indicated.
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