Sharp MX-4100N Service Manual page 45

3. Details of adjustment
ADJ 1
Adjust the developing doctor
gap
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 unit from the main unit, and remove
the developing unit upper cover and the developing doctor
cover.
2) Loosen the developing doctor fixing screw.
3) Insert a thickness gauge of 0.60mm in between 40mm - 70mm
from the edge of the developing doctor.
70mm
40mm
70mm
40mm
MX-5001N ADJUSTMENTS 5 – 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
0.60 ± 0.05mm.
* When inserting a thickness gauge, be careful not to scratch the
developing doctor and the developing roller.
70mm
40mm
Note for use of a thickness gauge
• 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.
* Marked point (A) on the follower side (right side) of the MG roller.
70mm
40mm
A