Auto-Toner Circuit; General Description - Toshiba e-STUDIO182 Service Manual

11.5 Auto-Toner Circuit

11.5.1

General description

1. Function of the auto-toner circuit
- Detects the toner density in the developer material, and supplies toner when the density is
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:
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
supply mechanism.
Developer unit
Recovered toner
supply section
Recovered toner
supply mechanism
Main
Recovered
motor
toner
e-STUDIO182/212/242
DEVELOPMENT SYSTEM
Control panel
"Toner Empty"
Temperature/humidity sensor
Toner cartridge
Toner
Auto-toner sensor
Developer material
MAIN board
Flash ROM
Toner
motor
Toner density signal
Control voltage signal
Fig. 11-4
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11 - 8
Control section
ASIC SoC
D/A
converter
A/D
converter