Chapter 9
9-5
9.3.2
Controlling the Fixing Film Temperature
9.3.2.1
Controlling the Power Supply in Response to Low Temperature
0007-5125
iR2270 / iR2870 / iR3570 / iR4570
In a low temperature environment, the heater is supplied with power before the fixing film is driven so as to soften
the grease applied to the fixing film. The mechanism of control is as follows:
If the temperature of the fixing film detected by the thermistor is lower than a specific level, the heater is supplied
with power for a specific period of time before a normal start-up mechanism is initiated.
If the temperature of the fixing film detected by the thermistor is higher than a specific level, the normal start-up
mechanism is imitated.
9.3.2.2
Controlling the Feeding in Response to Low Temperature
0007-5401
iR2270 / iR2870 / iR3570 / iR4570
In a low temperature environment, the feeding timing is changed according to the temperature detected by the
environment sensor so as to enhance the fixing capability. The details are described below.
When the environment sensor detection temperature is 13 deg C or less, the feeding timing is delayed by 5000 msec.
In thick paper mode, the feeding timing is not changed even if the environment sensor detection temperature is 13
deg C or less.
9.3.2.3
Controlling the Power Supply at Start-Up
0006-6583
iR2270 / iR2870 / iR3570 / iR4570
When the thermistor detection temperature is 180 deg C or less, the power control to compensate for the heater,
(varying according to input voltage and a heater resistor value) is performed so as to raise the temperature of the
fixing unit to the required temperature for fixing in a short time.
1. starts 65% power supply.
2. uses thermistor reading = T1 (deg C) occurring 400 msec after the start of 65% power supply.
3)uses thermistor reading = T2 (deg C) occurring 500 msec after the start of 65% power supply.
4. computes the difference between T2 and T1, refers to a power supply ratio table to compute a power supply ratio
X (%), and uses the result.
5. uses the thermistor reading = T3 (deg C) occurring 200 msec after the start of X (%) power supply.
6. uses the thermistor reading = T4 (deg C) occurring 300 msec after the start of the X (%) power supply.
7. computes the difference between T4 and T2, refers to a power supply ratio table, computes a power supply ratio
Y (%), and uses the result.
8. repeats step 5 through 7 until the start-up control target temperature is reached.
9. when the start-up control temperature is reached, shifts to copying temperature control.
Summary of Contents for iR4570 Series
Page 2: ...Download Free Service Manual And Resetter Printer at http printer1 blogspot com ...
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Page 81: ...Chapter 2 Installation ...
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Page 106: ...system setup network Ethernet driver setup auto detect ...
Page 126: ...F 2 94 3 2 3 1 ...
Page 127: ...Chapter 3 Basic Operation ...
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Page 137: ...Chapter 4 Main Controller ...
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Page 165: ...Chapter 5 Original Exposure System ...
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Page 213: ...Chapter 6 Laser Exposure ...
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Page 231: ...Chapter 7 Image Formation ...
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Page 249: ...F 7 13 1 2 3 4 ...
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Page 309: ...Chapter 8 Pickup Feeding System ...
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Page 465: ...Chapter 9 Fixing System ...
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Page 501: ...Chapter 10 External and Controls ...
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Page 565: ...Chapter 11 MEAP ...
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Page 573: ...Chapter 12 Maintenance and Inspection ...
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Page 613: ...Chapter 13 Standards and Adjustments ...
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Page 635: ...Chapter 14 Correcting Faulty Images ...
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Page 675: ...T 14 22 Notation Description VR201 for factory use ...
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Page 677: ...Chapter 15 Self Diagnosis ...
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Page 757: ...Chapter 16 Service Mode ...
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Page 760: ...Contents 16 8 1 COPIER 16 102 16 8 1 1 Copier List 16 102 ...
Page 869: ...Chapter 17 Service Tools ...
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Page 871: ...Contents Contents 17 1 Special Tools 17 1 17 2 Oils and Solvents 17 2 ...
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Page 875: ...Oct 8 2004 ...
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