K. Fixing/Delivery Assembly
1. Outline
The upper and lower rollers of the fixing
assembly and the delivery roller of the delivery
assembly are driven by the fixing motor (M17)
through a clutch. (See Figure 3-433.)
If a jam occurs in the fixing/delivery assembly,
the fixing drive stop solenoid (SL17) is turned ON
to stop the fixing roller immediately.
The upper roller is equipped with two built-in
heaters. (See Figure 3-432.)
The fixing temperature of the upper roller is
detected by a thermistor (TH1), and the DC con-
troller PCB exerts control so that it is maintained
at a specific level.
The surface temperature of the roller is con-
trolled in either of the following two modes
depending on the length of time from power-on
and the ambient temperature:
1 For 45 min from power-on,
Control temperature during standby:
195°C
Control temperature during copying:
200°C
Control temperature during energy saver mode:
190°C
2 For 45 min from power-on or when the ambi-
ent temperature is 28°C or more regardless of
the length of time from power-on,
Control temperature during standby:
190°C
Control temperature during copying:
195°C
Control temperature during energy saver mode*:
185°C
*May be varied in additional function mode.
Keep in mind that, due to avoid not to be
separated the transparencies, when using
the non recommended transparencies,
‘1’ is set for ‘OHP_TEMP’ in service mode
(
), and the temperature is set 20°C
lower than indicated above.
The cleaning belt used to clean the upper fix-
ing roller is taken up by moving up and down the
cleaning belt take-up arm operated by the clean-
ing belt drive solenoid (SL1). The cleaning belt
drive solenoid is turned ON once when the deliv-
ery sensor (Q15) detects the leading edge of copy
paper.
The edge of the cleaning belt is provided with
two notches to allow detection of the length of the
belt by two photointerrupters (Q8, Q9) and a
detecting lever.
Reference:
1.Heater
100V model
Main heater. . . . 930 W
Sub heater . . . . 550 W
208/220/240V model
Main heater. . . . 1600 W
2.Thermal switch. . . 240 ± 10°C
✻
5
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3. OPERATIONS AND TIMING
COPYRIGHT © 1996 CANON INC.
CANON NP6085 REV.0 JULY 1996 PRINTED IN JAPAN (IMPRIME AU JAPON)
3-117
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