Auto-Toner Circuit; General Description - Toshiba e-STUDIO167 Service Manual

12.5 Auto-Toner Circuit

12.5.1

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 fixed to certain ratio.
- Toner motor:
Supplies toner to the developer material.
- Control panel:
Indicates toner-empty information.
- Recovered toner supply section:
The main motor supplies the recovered toner to the developer unit from the recovered toner sup-
ply mechanism.
Developer unit
Recovered toner
supply section
Recovered toner
supply mechanism
Main
Recovered
motor
toner
e-STUDIO167/207/237
DEVELOPMENT SYSTEM
Control panel
"Toner Empty"
Temperature/humidity sensor
Toner cartridge
Toner
Auto-toner sensor
Developer material
MAIN board
Toner
motor
Toner density signal
Control voltage signal
Fig. 12-4
© February 2007 TOSHIBA TEC CORPORATION All rights reserved
12 - 8
Control section
Flash ROM
ASIC
D/A
converter
A/D
converter
SoC