Sharp MX-4100N Service Manual page 46

ADJ 2
Adjust the developing roller
main pole
This adjustment is needed in the following situations:
* The developing unit has been 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.
* The toner is excessively dispersed.
1) Remove the developing doctor cover, and place the develop-
ing unit on a flat surface.
2) Attach a piece of string to a sewing needle or pin.
3) Hold the thread and bring the needle near the developing
roller. (Do not use a paper clip because too heavy. It will not
provide a correct 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.
A
37.8 + 0.5mm
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.
2 3mm
37.8 + 0.5mm
MX-5001N ADJUSTMENTS 5 – 4
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.
ADJ 3
Toner density control reference
value setting
This adjustment is needed in the following situations:
* When developer is replaced.
NOTE: Be sure to execute this adjustment only when developer is
replaced. Never execute it in the other cases.
1) With the front cabinet open, enter SIM25-2.
Abnormal end
2) Close the front cabinet.
3) Select a developing unit to be adjusted.
K
M
EXECUTE
Adjustment completed