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2. Automatic fixing unit pressure OFF function
This function turns OFF the fixing roller pressure to improve jam clearance and to prevent per-
manent deformation of the rollers caused by the pressure applied to the same areas of the rollers
for a long period of time.
The fixing roller pressure is turned OFF by the fixing unit pressure cam in the fixing unit.
The fixing unit pressure cam and the rollers in the fixing unit are driven by the fixing motor (M1).
The fixing unit drive unit has two one-way clutch gears. When the M1 rotates clockwise, the
rotation of the M1 is transmitted to the upper fixing roller drive gear and the delivery roller gear,
and the upper fixing roller and the delivery roller are rotated. When the M1 rotates counter
clockwise, the rotation of the M1 is transmitted to the pressure cam drive gear, and the fixing
unit pressure cam is rotated.
When the fixing temperature control is stopped due to power-OFF, jams, failures, or sleep
mode, the M1 rotates counter clockwise, and the fixing unit pressure cam makes a half rotation
pushing the pressure link and turning OFF the pressure from the lower fixing roller.
When the power is turned ON (when the fixing heater reaches the fixing unit drive start tem-
perature, 100ÞC, after power-ON) or when the printer becomes ready for fixing unit temperature
control after jam clearance, the M1 rotates counter clockwise, the fixing unit pressure cam
makes a half rotation to apply the pressure to the lower fixing lower, and then the M1 starts
rotating clockwise.
Figure 2-5-9
2 - 87
CHAPTER 2
M1
Clockwise
M1
Counter clockwise
Upper fixing roller gear
Fixing unit pressure cam
Fixing delivery roller gear
Face-up delivery roller gear
Upper fixing roller
Lower fixing roller
Pressure spring
Fixing unit
pressure cam
Pressure link
Lower fixing roller pressure plate
Pressure cam drive gear
One-way clutch gear
One-way clutch gear
< Pressure ON >
< Pressure OFF >
Содержание CLBP-460PS
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Страница 245: ...D Electronic Components 1 Locations Figure 3 9 22 3 75 CHAPTER 3 Duplexing unit driver PCB Power supply unit ...
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Страница 263: ...b Configuration Page The Configuration Page lists the selected options for all Setup menus Figure 4 1 4 4 9 CHAPTER 4 ...
Страница 264: ...c PCL Font List The PCL Font List page lists the printer s resident PCL fonts Figure 4 1 5 4 10 CHAPTER 4 ...
Страница 267: ...f Menu Help An overview of the screens you can access from the control panel is printed Figure 4 1 8 4 13 CHAPTER 4 ...
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Страница 335: ...APPENDIX I GENERAL TIMING CHART A 1 II GENERAL CIRCUIT DIAGRAM A 25 III LIST OF SIGNALS A 29 IV MESSAGE TABLE A 36 ...
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