Canon LBP5050 Series, Руководство по обслуживанию

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Chapter 2
2-12
2.5.3 Cassette Pickup
2.5.3.1 Separation Roller Method
0018-6697
LBP5050N / LBP5050
The printer has a separation roller method to prevent multiple sheets of media from entering to the printer.
The paper separation roller follows the rotational direction of the pick-up roller because it does not have its own driving force.
- Normal-feed
The separation roller is driven by the pickup roller through a sheet of print media. That is, the separation roller rotates in the media feed direction.
- Multiple-feed
The low friction force between the sheets weakens the rotational force from the pickup roller. The separation roller is limited its rotational force and it does not
rotate with such weak driving force from the pickup roller. As the separation roller does not rotate, the multiple sheets are not fed to the printer.
F-2-17
2.6 FIXING UNIT SYSTEM
2.6.1 Overview/Configuration
2.6.1.1 Outline
0018-6518
LBP5050N / LBP5050
The fixing power supply controls the temperature in the fixing unit. The printer uses an on-demand fixing method.
F-2-18
- Heater (H801): Heats the fixing film
- Thermistor (T802): Detects the fixing film temperature (Contact type)
Media
Separation roller
Pickup roller
Lifting plate
<Multiple-feed> <Normal-feed>
The separation roller does not rotate.
TH802
FU1
H801
FIXING HEATER
DRIVE signal
Fixing control
circuit
FIXING TEMPERATURE signal
Pressure rolleTER
Fixing film
DC controller
Fixing power supply
Fixing heater
safety circuit