(2) Adjusting developing magnet roller main pole
position
1
Remove the four screws securing the toner hopper and the
developer tank and 5-pin connector, to separate the toner tank
hopper from the developer tank. Lay the developer tank on a level
surface.
2
Tie thread to a sewing needle or set screw, as shown above.
3
Holding one end of the thread, bring the needle close to the MG
roller keeping it horizontal. (Do not use a clip, because the MG
roller is so small that you cannot pinpoint the correct position.)
4
Keep the tip of the needle 2
∼
3 mm away from the MG roller
surface and mark its surface in a position which hits the line
extended from the needle’s end. (Do not let the tip of needle
contact the MG roller.)
5
Measure the distance between the marking and the developer
tank shaded area P. Make sure the distance is 20.5 mm.
If the value is not as specified, loosen the screw A securing the
main pole adjustment plate and move the adjustment plate
properly in the direction indicated by the arrow.
(3) Adjusting DV bias voltage
1
Set the digital multi meter range for DC 400V or more.
2
Put the test rod between the DV bias output check pin (CP-B) and
the chassis (GND).
3
Execute SIM 8-1 to check the DV bias voltage.
DV bias in each mode
Output voltage
Auto
8-1
–400
±
5V
Manual
8-1
–400
±
5V
Photo
8-1
–400
±
5V
Soft-focus photo
8-1
–400
±
5V
Toner saving
8-1
–350
±
5V
Printer
8-1
–400
±
5V
4
If the DV bias output voltage is not in the range shown in the
above table, change the set value again.
(4) Pay attention to the following points when
installing developing unit rollers
1
Direction of installing V rings
2
Make sure there is no clearance between the V ring and roller in
the marking position (
@
).
3
Installation of the
φ
8 ring, C ring 8 and
φ
6 V rings.
Keep needle
away 2 or 3 mm
P
20.5mm
A
20.5mm
CPB
V ring,
φ
8
(Rear)
(Front)
MG roller
V ring,
φ
8
(Rear)
(Front)
Roller SV (X1)
V ring
φ
6
V ring
φ
6
8 – 2
