Functions - Toshiba e-STUDIO2006 Service Manual

3.13.3

Functions

[ 1 ] General description
1. Toner cartridge installation detection mechanism (IC chip)
The toner cartridge is filled with toner. The toner motor drives the cartridge to supply the toner to the
developer unit.
The IC chip detects whether a toner cartridge is installed.
2. Developer unit
- Developer material
The developer material is made of a mixture of the carrier and toner.
The carrier is an electrical conductive ferrite whose size is approx 44 µm. The toner is a resin
particle whose size is approx 8.5 µm.
The developer material needs periodic replacement since its quality is deteriorated by long use.
- Mixers-1 and -2
Friction is generated by mixing the developer material. The carrier is charged to (+) and the toner
to (–), and the image is formed on the drum surface by the static electricity caused by the friction.
- Developer sleeve (Magnetic roller)
This is an aluminum roller with a magnet inside. The magnet works to absorb the developer
material and forms the magnetic brush. The magnet is fixed and only the sleeve around is
rotated. This rotation makes the magnetic brush of the developer sleeve sweep over the drum
surface and perform development.
- Doctor blade
Doctor blade controls the amount of the developer material transported by the developer sleeve
so that the magnetic brush of the developer material contacts with the drum surface properly.
- Auto-toner sensor
The carrier and the toner (toner density) in the developer material should be always fixed to a
certain ratio to output normal images. The auto-toner sensor detects the inclusion ratio of the
toner in the developer material by using a magnetic bridge circuit. When the quantity of toner
becomes insufficient, the toner motor is driven to supply the toner from the toner cartridge.
- Recovered toner supply mechanism
The toner scraped off by the drum cleaning blade is transported by the toner recovery auger and
returned to the developer unit to be recycled.
3. Toner cartridge
This is filled with the toner and this supplies the toner to the developer unit by the drive of the toner
motor (M2). The toner cartridge in this equipment mounts the toner cartridge PC board (CTRG), and
the data identifying recommended TOSHIBA toner cartridges and the counter values determining
that the cartridge is nearly empty are written in this board. These data are read out by the toner
cartridge interface PC board (CTIF) in this equipment, and data related to toner supply are also
written in the toner cartridge PC board (CTRG). The toner cartridge interface PC board (CTIF) also
detects whether the toner cartridge is installed or not.
4. Toner motor (M2)
P. 3-42 "3.10.3Functions 2.Toner motor (M2)
© 2013-2017 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO2006/2306/2506/2007/2307/2507/2303A/2303AM/2803AM/2309A/2809A
3 - 57
OUTLINE OF THE MACHINE
3