Ricoh FT7770 Service Manual page 207

<Development Unit>
1. Do not force the development roller to turn opposite to the normal
direction of rotation because the gears may be damaged.
2. Never loosen the paint-locked screws that secure the development unit
positioning bracket.
special tools.
3. Always lower the top unit before tightening the development unit
mounting screw. (A slot on the top unit fits over the positioning pin on
the front of the development unit.)
4. Be careful not to nick or scratch the development roller sleeve (which is
made of aluminum).
5. Always make sure that there are no splits in the upper brush seal.
Splits in the upper brush will cause toner scattering, resulting in a dirty
toner shield glass.
6. When the development unit is out of the copier, always place a sheet of
paper under it to prevent any small pieces of metal (staples, clips, E-
rings, etc.) from being attracted to the development roller and getting
inside the unit.
7. Do not take off the insulating mylar under the toner cartridge lever.
8. After servicing, make sure the bias switch is on.
<Transfer and Separation Corona>
1. Do not loosen the paint-locked screws securing the positioning plate of
the transfer and separation unit.
2. Do not loosen the paint-locked screws holding the entrance mylar guide
of the transfer and separation corona unit.
<Cleaning Unit>
1. Do not damage the cleaning blade edge. Clean the blade with a soft,
clean cloth.
2. Do not touch the cleaning brush with oily hands which impair the
cleaning function.
3. Before pulling out the cleaning unit, place a sheet of paper under it to
catch toner falling from the entrance mylar seal.
4. Before adjusting the cleaning blade pressure, check all other possible
causes.
5. Clean the toner catcher at each service call.
This bracket is positioned at the factory, using
4-15
30
April, '89