Canon IR1600 User Manual

CHAPTER 5 IMAGE FORMATION SYSTEM
COPYRIGHT © 2002 CANON INC. 2000 CANON iR1600/iR2000 REV.1 JAN. 2002
5-11
5 Detecting the Presence/Absence of a Cartridge
and the Level of Toner
5.1 Outline
A toner level sensor is mounted inside the developing assembly.
The machine uses the output (Ant) of the toner level sensor inside the developing assem-
bly and the output level (Dv) of the developing bias in various detection circuits for A/D
conversion.
The CPU checks the difference in level between the cartridge detection signal
(TNRCHKD) and the toner detection signal (TNRCNKT) after A/D conversion when the
developing bias is applied, thus finding out the presence/absence of cartridge and the level
of toner.
TB403/TB404Dv
TB405/TB406Ant
TNRCHKT
TNRCHKD
To developing
cylinder
From toner
level sensor
DC controller PCB
Developing bias
generation circuit
ASIC
CPU
Developing bias
detection circuit
Toner level
detection circuit

Canon IR1600 Specifications

General

Print Technology	Laser
Type	Monochrome
Maximum Print Resolution	600 x 600 dpi
Print Resolution	600 x 600 dpi
Copy Resolution	600 x 600 dpi
Standard Paper Capacity	250 sheets
Maximum Paper Size	A4
Functions	Print, Copy, Scan
Print Speed	16 ppm
Copy Speed	16 cpm
Scan Resolution	600 x 600 dpi
Operating System Compatibility	Windows
Interface	USB 2.0