Auto-Toner Circuit; General Description - Toshiba e-STUDIO 200L 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 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.
- LCD panel:
Indicates toner-empty information.
Control panel
Display panel
Toner cartridge
Toner
Developer material
Developer unit
e-STUDIO200L/202L/230/232/280/282 DEVELOPMENT SYSTEM
e-STUDIO202L/232/282
FRAM
IC21
ASIC
IC23
Toner
motor
Control voltage signal
Toner density signal
Auto-toner sensor
Fig.12-5
Arithmetic and control unit
e-STUDIO200L/230/230L
CPU
IC15
North bridge
IC14
Motor driver
( TA8428 )
IC1
Temperature/humidity sensor
12 - 6
05/11
SYS board
/280/280S
NVRAM
IC55
CPU
ASIC
IC41
IC49
LGC board
ASIC
NVRAM
IC24
IC31
Engine-
D/A converter
CPU
A/D converter IC22
June 2004 © TOSHIBA TEC