Drum And Charge; Drum Replacement - Ricoh FT7770 Service Manual

DRUM AND CHARGE

1. Drum Replacement

Open the top unit, and remove the drum cover [A] (2 screws).
1.
Remove the drum stay [B] by turning the knob counterclockwise.
2.
Remove the following parts:
3.
a) Erase unit [C]
b) Charge corona unit [D] (1 connector)
c) Drum thermistor [E]
d) Quenching unit [F] (1 connector)
e) Cleaning unit [G]
f) Drum flange gear [H]
NOTE: When removing or installing the cleaning unit, press the drum shaft to the
left to prevent drum damage.
Install the drum guide on the drum shaft, and pull out the old drum.
4.
CAUTION: If the drum is removed for maintenance purposes, the drum protective sleeve
must be inserted.
Insert a new drum with the drum protective sleeve on it, then remove
5.
the drum protective sleeve.
maintenance.)
Reassemble the machine.
6.
Place a white sheet of A3 or 11" x 17"
7.
lower the ADF transport unit. Turn on
for 15 minutes.
(Save the protective sleeve for future
paper on the exposure glass and
Service Program 1-3 (Free Run)
5-3
30
April, '89