Ricoh FT7770 Service Manual page 545

I
Is the cleaning blade defective?
Y N
Adjust the cleaning blade pressure.
Clean the cleaning wire, and replace the cleaning blade.
4) Dirty background after
solid black copies.
Is the quenching lamp defective?
Y N
Is the PCC wire installed
Y N
I
If the PCC corona current is incorrect, clean the wire
and adjust the PCC corona current.
Clean the PCC unit (including wire) and reset the PCC wire.
Replace the quenching lamp.
5) Dirty background at the
rear side of the copy
If there is a lot of developer in the developer catch pan, clean
the developer catch pan, and make sure that the developer
exchange plate is installed properly.
incorrectly?
13-21
30 April, '89