Technical information

m OPERATIONS AND TIMING
1. Controlling the Transfer
2. Cleaning Niechanlsm
3-38
Motor driver PCS
Corona Wire Cleaning
Mechanism
1. Outline
The copier has an automatic cleaning mecha-
nism for the transfer corona wire; cleaning is exe-
cuted when the power switch is turned ON or when
the fixing assembly is 1OO”C/212”F or below.
The wire cleaner is moved by the cleaner motor
(M4) back and forth once along the wire (about 20
sec).
When the wire cleaner mount moving folward by
M4 actuates the microswitch (SW9) located at the
rear of thetransfer rail, M4 rotates in reverse to move
the wire cleaner in reverse.
The wire cleaner stops when the wire cleaner
mount actuates the microswitch (SW6) located in
front of the transfer rail (home position). If SW6 is not
actuated, the COPY START key on the control panel
remains red for 90 sec even after the wait period is
over.
If the power is turned OFF in the middle of
cleaning operation, the wire cleaner mount stops
where it is. If the transfercorona assembly has been
dertached in this condition, attach it back to the
copier while holding the wire cleaner at the rear by
hand.
Cleaner motor (M
er corona unit
/
re cleaner home
sition switch (SW6)
Figure 3-37
DC controller PCS
COPYAIGNT & 1592 CANON ING.
CANON NPZl20/2MO AEV.I JAN, 1992 PRINTEO IN JAPAN IIMPRIME AU JAPONI