Canon PC740 Service Manual - Page 94

Canon Pc72084017501170

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=OPERATIONS AND TIMING Fixing film Fixing film (front) I Coverage of fixing film decreases Tension wire Balance spring Figure 3-419 The front of the fixing film starts to move toward the front when the front of the tension roller is raised. As the fixing film moves toward the front, the coverage of the friction roller by the fixing film will become greater to increase the rotation force of the friction roller; the condition will cause the tension wire to move down the front of the tension roller. As the front of the tension roller is moved down, the tension of the balance spring will increase, and the tension roller will stop where the tension of the tension wire and the tension of the balance spring become balanced. (front) Coverage of fixing film increases Tension wire Balance spring Figure 3-420 c. Measures for 'E007' Use fixing film displacement correction mode if `E007' is indicated as follows: 1) Turn off the power switch, and leave the copier alone for about 10 min. • The temperature of the fixing heater will drop below 100°C. 2) Turn on the power switch. • The copier indicates 'C' on the control panel, and the fixing assembly becomes activated moving the fixing film (about 3 min). 3) After 3 min, the 'C' indication on the control panel will disappear when the fixing film returns to its appropriate position, and the copier enters standby state. If `E007' does not disappear after executing the above fixing film displacement correction mode, see the instructions under "Correcting the Displacement of the Fixing Film" in the Service Handbook (p.2-10). 3 - 54 COPYRIGHT © 1994 CANONINC. CANON PC72084017501170REVD AUG.1994 PRINTEDIN JAPAN(refilmt AU JAPON)

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=OPERATIONS
AND
TIMING
(front)
Fixing
film
I
Coverage
of
fixing
film
decreases
Tension
wire
Balance
spring
Figure
3-419
The
front
of
the
fixing
film
starts
to
move
toward
the
front
when
the
front
of
the
tension
roller
is
raised.
As
the
fixing
film
moves
toward
the
front,
the
coverage
of
the
friction
roller
by
the
fix-
ing
film
will
become
greater
to
increase
the
rotation
force
of
the
friction
roller;
the
condi-
tion
will
cause
the
tension
wire
to
move
down
the
front
of
the
tension
roller.
As
the
front
of
the
tension
roller
is
moved
down,
the
tension
of
the
balance
spring
will
increase,
and
the
tension
roller
will
stop
where
the
tension
of
the
tension
wire
and
the
tension
of
the
balance
spring
become
balanced.
(front)
Fixing
film
Coverage
of
fixing
film
increases
Tension
wire
Balance
spring
Figure
3-420
c.
Measures
for
'E007'
Use
fixing
film
displacement
correction
mode
if
`E007'
is
indicated
as
follows:
1)
Turn
off
the
power
switch,
and
leave
the
copier
alone
for
about
10
min.
•
The
temperature
of
the
fixing
heater
will
drop
below
100°C.
2)
Turn
on
the
power
switch.
•
The
copier
indicates
'C'
on
the
control
panel,
and
the
fixing
assembly
becomes
activated
moving
the
fixing
film
(about
3
min).
3)
After
3
min,
the
'C'
indication
on
the
con-
trol
panel
will
disappear
when
the
fixing
film
returns
to
its
appropriate
position,
and
the
copier
enters
standby
state.
If
`E007'
does
not
disappear
after
exe-
cuting
the
above
fixing
film
displacement
correction
mode,
see
the
instructions
under
"Correcting
the
Displacement
of
the
Fixing
Film"
in
the
Service
Handbook
(p.2-10).
3
-
54
COPYRIGHT
©
1994
CANON INC.
CANON PC72084017501170
REVD
AUG.1994
PRINTED
IN
JAPAN
(refilmt
AU
JAPON)