MX-6240N, MX-7040N (serv.man24). Section 5 Adjustments and Settings - Updated November 2012 - Sharp Copying Equipment Service Manual (repair manual). Page 4

MX-7040N  ADJUSTMENTS AND SETTINGS  5 – 4

• Do not insert the gauge diagonally.

• The gauge must pass freely.

• The advisable point of measurement is the MIN point of the MG

roller oscillation.

 

This adjustment must be performed in the following cases:

* 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 46.4 



0.5mm.

If the distance is not within the above range, adjust the devel-
oping roller main pole position in the following procedures.

6)

Loosen the fixing screw of the developing roller main pole
adjustment plate in the rear side of the developing unit, 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.

㨪3mm