Sharp MX3111U

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.

Be careful not to attach a fingerprint, oil, grease, or a foreign material on the DV roller during the procedure. Also be careful not to scratch the DV roller surface. If a fingerprint, oil, grease, or a foreign material is erroneously attached to the DV roller during the procedure, remove all developer from the developing unit and clean the roller with alcohol.
Do not exert force when holding the DV Unit.

1. Remove the developing unit from the main unit, and remove the developing doctor cover.
2. Loosen the developing doctor fixing screw.
3. Insert a thickness gauge of 0.65mm in between 40mm - 70mm from the edge of the developing doctor.
   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 DV roller oscillation.
   
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 0.65 ± 0.05mm.