Canon MF5940dw - Fixing Control Circuit; Throughput Reduction Control

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Technical Overview > Fixing System > Fixing Control Circuit > Throughput Reduction Control
Technical Overview > Fixing System > Fixing Control Circuit > Throughput Reduction Control
Fixing Control Circuit
The Fixing control circuit controls the temperature in the Fixing Assembly. The printer uses an
on-demand Fixing method.
The gure below shows the conguration of the Fixing control circuit.
TH201/2010
TP1/11
H201/2010
FIXING TEMPERA TURE signal
Pressure roller
FIXNG HEATER CONTROL signal
Fixing film
Fixing heater
control circuit
Fixing heater
safety circuit
DC controller
Low-voltage power supply unit
Engine controller
Fixing control circuit
• Fixing Heater (H201/2010): Heats the Fixing Film
• Thermistor (TH1/11): Detects Fixing temperature (Contact type)
• Thermoswitch (TP201/2010):Prevents an abnormal temperature rise of the Fixing
Heater (Contact type)
These temperature controls in the Fixing Assembly are performed by the Fixing Heater control
circuit and the Fixing Heater safety circuit according to the commands from the DC Controller.
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Throughput Reduction Control
During continuous printing, the throughput is changed to reduce heat buildup on parts not in
contact with paper, to improve Fixing characteristics and reduce curling.
The throughput reduction is implemented according to the following conditions.
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Small Size Paper Speed Control
Fixing Mode Throughput
ENVELOPE 1 - 2 imprints
17 ppm
3 - 4 imprints
12 ppm
5 imprints
8 ppm
6 imprints or
more
6 ppm
ENVELOPE2 1 - 3 imprints
17 ppm
4 - 7 imprints
12 ppm
8 - 22 imprints
8 ppm
23 imprints or
more
6 ppm
ENVELOPE3 1 - 3 imprints
12 ppm
4 - 5 imprints
8 ppm
6 imprints or
more
6 ppm
Postcard 1 - 3 imprints
12 ppm
4 - 5 imprints
8 ppm
6 imprints or
more
6 ppm
Long Narrow
Normal/Light/OHT 1 - 280 imprints
2 ppm
281 imprints or
more
1 ppm
Label/Heavy1/Heavy2
Envelope/ Envelope2/
Envelope3
1 imprints or more
3 ppm
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16K Paper Speed Control
Fixing Mode Throughput
Normal/Light/
OHT
(Normal mode)
1 - 27 imprints
16 ppm
28 - 39 imprints
14 ppm
40 - 79 imprints
12 ppm
80 - 199
imprints
10 ppm
200 imprints or
more
8 ppm
Normal/Light/
OHT
1 imprints or
more
6 ppm
Envelope2/
Quiet
1 - 89 imprints
17 ppm
90 imprints or
more
14 ppm
Label/
Envelope/
Envelope3
Heavy1/
Heavy2/
Postcard
1 - 34 imprints
17 ppm
35 imprints or
more
8 ppm
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