Auto-Toner Circuit; General Description - Toshiba e-STUDIO350 Service Manual

12.4 Auto-Toner Circuit

12.4.1 General description

(1) Function of the auto-toner circuit
· Detects the toner density in the developer material, and supplies toner when the density is lowered
to a certain level.
· Detects that there is no toner left in the cartridge (toner-empty detection).
(2) The auto-toner circuit consists of the following:
· Auto-toner sensor : Detects the toner density.
· Control section
· Toner motor
· Display
Control panel
12
Display panel
Toner cartridge
Toner
e-STUDIO350/450 DEVELOPMENT SYSTEM
: Controls the toner density so that the toner in the developer material is fixed
to certain ratio.
: Supplies toner to the developer material.
: Indicates toner-empty information.
Toner
motor
Auto-toner sensor
Developer material
Developer unit
Arithmetic and control unit
Control D/A
voltage signal
converter
IC2
Toner density
signal
Fig. 12-401
12 - 4
SYS board
NVRAM
IC38
CPU
ASIC GA
IC52
IC54
LGC board
ASIC GA
IC38 MAIN
CPU
IC24
TA8428
IC51
November 2003 © TOSHIBA TEC