Auto-Toner Circuit; General Description - Toshiba e-STUDIO200L 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/203L/230/232/233/280/282/283
DEVELOPMENT SYSTEM
e-STUDIO202L/232/282
e-STUDIO203L/233/283
FRAM
IC21
ASIC
IC23
Toner
motor
Control voltage signal
Toner density signal
Auto-toner sensor
Fig. 12-5
12 - 6
07/11
Arithmetic and control unit
e-STUDIO200L/230/230L/
CPU
IC15
North bridge ASIC
IC14 IC49
Motor driver ASIC
( TA8428 )
IC1 IC24
D/A converter
A/D converter
Temperature/humidity sensor
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SYS board
280/280S
NVRAM
IC55
CPU
IC41
LGC board
NVRAM
IC31
Engine-
CPU
IC22