Toshiba e-STUDIO353 - Auto-Toner Circuit; General Description

12 - 4
12
e-STUDIO350/352/353/450/452/453
DEVELOPMENT SYSTEM
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IC52
CPU
IC38
NVRAM
IC54
ASIC GA
IC14
North bridge
IC15
CPU
IC21
FRAM
IC23
ASIC GA
IC38
ASIC GA
IC51
TA8428
SYS board
e-STUDIO352/353/452/453 e-STUDIO350/450
Arithmetic and control unit
LGC board
Control panel
Developer unit
Toner density
signal
Control
voltage signal
Auto-toner sensor
Toner
Toner cartridge
Toner
motor
Developer material
Display panel
IC24
Engine
CPU
IC2
D/A
converter
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 low-
ered 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 : Controls the toner density so that the toner in the developer material is
xedtocertainratio.
· Toner motor : Supplies toner to the developer material.
· Display : Indicates toner-empty information.
Fig. 12-401
07/11