Toshiba e-studio555 - Page 242

e-STUDIO555/655/755/855 © 2009 - 2011 TOSHIBA TEC CORPORATION All rights reserved
DEVELOPER UNIT
11 - 10
2. Configuration of the auto-toner circuit
- Auto-toner sensor:
Detects the toner density.
- Toner cartridge empty sensor:
Detects that the new toner is almost consumed. (The toner cartridge is empty.)
- Control section:
Controls each section to maintain the toner density of the developer material at a constant ratio.
- Control panel:
Displays a status that the toner cartridge is nearly empty.
- New toner supply section:
The new toner supply motor and the new toner transport motor in this section supply the new
toner to the developer unit from the toner cartridge.
- Recycle toner supply section:
The hopper motor in this section supplies the recycle toner to the developer unit from the recycle
toner hopper.
Fig. 11-7
New toner
Sub hopper
Developer material
Auto-toner sensor
New toner
Toner cartridge
New toner supply section
Recycle toner
supply section
Temperature/humidity sensor
New toner
transport
motor
New toner
supply
motor
Recycle
toner
Recycle toner
hopper
Hopper
motor
IC18
A/D
converter
IC58
Main CPU
A/D converter
IC56
ASIC
IC27
NVRAM
Control panel
LGC board
Developer unit
LCD panel
Control voltage signal
Toner density signal
IC11
Buffer
IC12
SoC
(
System on chip
)
FRAM
LVDS
driver
SYS board
Control section