[7] ADJUSTMENTS1. Developing section1-1. Developing doctor clearance adjustmenta. If the clearance between the developing doctor and the MAGroller is improper, the following trouble may occur.• Insufficient coy density• Background copy• Toner splash(1) Remove the developing unit from the copier.(2) Loosen four screws (A) which hold plate D fixed.(3) Insert two clearance gauges of 0.6mm into the clearance be-tween plate D and the MAG roller. For insertion of the clearance gauges, refer to thefigure below.(4) With two clearance gauges inserted, gently press plate D andtighten four screws (A).(5) Check that the clearances at two points 50 ∼ 80 mm from theboth ends of the developing doctor are within the specifiedrange (0.6 ± 0.03mm). When inserting the clearance gauges, be carefulnot to scratch the plate D and the MAG roller. When adjusting or checking, be careful not to allowforeign materials (oil, etc.) to attach to the MAGroller sleeve.(6) After adjustment, apply screw lock to the four screws (A).1-2. Developing magnet roller main pole positionadjustmenta. If the MAG roller main pole position is improper, the followingtroubles may occur.• Insufficient copy density• Toner splash(1) Remove the developing unit from the copier.(2) Tie a thread to a needle as shown below.(3) Hold the thread and bring the needle close to the MAG roller.(4) Mark the contact point of the thread on the MAG roller sleevesurface.0.6 ± 0.03mmA A50mm30mm50mm30mmPlate DMAG rollerClearance gauges0.6mmMarking7 – 1 |
