MX3500N ADJUSTMENTS 6 – 3
4) Push the developing doctor in the arrow direction, and tighten
the fixing screw of the developing doctor. (Perform the similar
procedure for the front frame and the rear frame.)
5) Check that the doctor gaps at two positions in 40mm – 70mm
from the both sides of the developing doctor are in the range of
0.40
±
0.05mm.
* When inserting a thickness gauge, be careful not to scratch the
developing doctor and the developing roller.
Note for use of a clearance gauge
• Use a non-polarity gauge.
• Do not insert the gauge diagonally.
• The gauge must pass with its own weight. (It will free-fall if you
release your hand from it.)
• The advisable point of measurement is the MIN point of the MG
roller oscillation.
* Marked point (A) on the follower side (right side) of the MG roller.
ADJ 2
Developing roller main pole
position adjustment
This adjustment must be executed in the following cases:
* When the developing unit is disassembled.
* When the print image density is low.
* When there is a blur on the print image.
* When there is unevenness in the print image density.
* There is abnormally much toner dispersion.
1) Remove the developing doctor cover, and place the develop-
ing unit on a flat surface.
2) Attach a thread to a needle or a pin.
3)
Hold the thread and bring the needle near the developing
roller. (Do not use a paper clip because it will not provide a cor-
rect position.)
4)
Mark the developing roller surface on the extension line of the
needle with the needle at 2 – 3mm from the developing roller
surface. (Never touch the needle tip with the developing roller.)
5)
Measure the distance between the marking position and posi-
tion A of the developing unit frame, and check that it is 37.8
±
0.5mm.
If the distance is not within the above range, adjust the devel-
oping roller main pole position in the following procedures.
6)
Remove the developing unit front cover, loosen the fixing
screw of the developing roller main pole adjustment plate, and
move the adjustment plate in the arrow direction to adjust.
Repeat procedures 3) – 6) until the developing roller main pole
position comes to the specified range.
7)
After completion of the adjustment of the developing roller
main pole position, fix the developing roller main pole adjust-
ment plate with the fixing screw.
40mm
70mm
40mm
70mm
A
2
㨪
3mm
A
37.8 + 0.5mm
37.8 + 0.5mm
Summary of Contents for MX 3501N - Color Laser - Copier
Page 64: ...MX3500N ADJUSTMENTS 6 19 E F Yellow C D Magenta A B Cyan ...
Page 390: ...MX3500N PHOTOCONDUCTOR SECTION i 7 3 6 7 9 8 10 2 5 7 9 1 4 11 ...
Page 444: ...Memo ...
Page 445: ...Memo ...