Charge Corona; Development - Ricoh A109 Service Manual

1.6 CHARGE CORONA

1. Clean the charge corona wire with a dry cloth. Do not use sandpaper or
a solvent.
2. Clean the charge corona casing with wet cotton and dry cloth.
3. Clean the end blocks with a blower brush first to remove toner and paper
dust. Then clean it with dry cloth if any toner still remains on it.
4. Do not touch the corona wires with oily bare hands. oil stains may cause
uneven image density on copies.
5. Make sure that there is no foreign material (iron filings, etc.) on the
casing.
6. When installing new corona wires, do not bend or scratch the wire
surface to avoid any uneven charge. Also be sure that the corona wires
are correctly positioned in the grooves of the end blocks.
7. Clean the charge grid plate with a blower brush, water, then with a dry
cloth. When doing so, be careful not to damage the grids by letting them
catch fibers.
8. Do not touch the charge grid plate with oily bare hands. Also, do not
bend the charge grid plate or make any dent on it. Doing so may cause
uneven charge.
9. After servicing the corona unit, perform the process control self check.

1.7 DEVELOPMENT

1. Be careful not to nick or scratch the development rollers.
2. Place the development units on a sheet of paper after removing it from
the copier.
3. Never disassemble the development roller assembly. The position of the
doctor plate is set with a special tool and instrument at factory to ensure
the proper gap between the doctor blade and the development roller.
4. Clean the drive gears after removing used developer.
5. Dispose of used developer according to local regulations.
6. When removing or installing the development unit, be careful not to
damage the drum surface by the entrance seal on the development unit.
7. Never load different types of developer and toner into the development
unit. Doing so will cause poor copy image and toner scattering.
A109 4-4 FSM