Minolta EP1030 - Toner Detection and Magnet Roller

Toner Empty Detection
The copier has no toner empty detecting sensor and, instead, the ATDC Sensor
performs that function. The toner-empty condition is canceled after detection under
any of the following conditions:
@ The set T/C ratio has been recovered.
e After the Front Door has been swung open and closed.
(For details, see “9-2. Toner Replenishing Controlfion p.M-20.)
Standard
Control Signal Set T/C Output
ea
4. | 4.0% |
UNS PWB-A PJ 1 OA-2
WIRING DIAGRAM
Paneer
som | 28 |
Psan [200]
eon | 208 |
[ese | 20 |
M-14
Cee ee eee eee ne ssn ase dei eee ee ET ee
1159S8M0702A
7-2, Magnet Roller
The Magnet Roller of the Sleeve/Magnet Roller of this copier has the following
magnetic characteristics,
The Sleeve Roller, onto which developer is attracted by the magnetic fields of force
set up by the poles of the Magnet Roller, turns to convey the developer toward the
point of development. It also means that developer fresh from the Developer Mixing
Chamber is always brought to the point of development.
As we noted earlier, the Imaging Unit integrates the Developing Unit with the PC
Drum into one body. Because of that, it is impossible to move the Developing Unit
against the PC Drum, thereby providing a certain distance between the PC Drum
and Sleeve/Magnet Roller. The Magnet Roller has therefore been made movable:
the Bushing is pressed by compression springs thereby pressing the Positioning
Collars on both ends of the Magnet Roller against the PC Drum. This ensures a
given distance between the PC Drum and the Sleeve/Magnet Roller.
Magnetic Pole Positioning
$2
(
N3
N1
N2
Si 1159MOO4AA
Movable Bushing
Compression Spring
Fixed Bushing
PC Drum 1139MO17AA,
M-15