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bizhub C4000i/C3300i
• The fusing speed is increased or decreased as necessary to make sure that the paper loop amount falls within a predetermined range,
thereby absorbing a difference between the fusing speed and image transfer speed.
• The fusing loop control will finish after the trailing of the paper passes the 2nd transfer roller.
Fusing speed adjustment
• If double transferred images or brush effects occur due to inadequate paper loop before fusing, adjust the fusing speed using [Service
Mode] -> [Machine] -> [Fusing Transport Speed].
(2) Fusing belt deformation prevention control
• The fusing belt is rotated to prevent the fusing belt from remaining placed on the same side for long periods of time, preventing
deformation.
• Prevents uneven gloss due to fusing belt deformation.
(a) Specific controls
• Select Mode 2 in the Service Mode settings to enable the fusing belt deformation prevention control.
• Configured from [Service Mode] -> [System 2] -> [Fuser roll deform].
Mode
OFF
Mode 1
Mode 2
(3) Fusing temperature control
• The fusing temperature control detects the surface temperature of the fusing roller using the fusing temperature sensor and turns the
fusing heater lamp ON/OFF.
When the fusing heater lamp is turned ON, the fusing roller is heated at the specified temperature.
[7]
[6]
[1]
Fusing belt
[3]
Fusing heater lamp (HL1)
[5]
Heating roller temperature sensor (TEMS)
[7]
Heating roller thermistor/Edg (TH1)
(a) Fusing heater lamp
• The heating roller contains a fusing heater lamp assy in it. The fusing heater lamp turns ON to generate heat, which heats the heating
roller and fusing belt.
• The fusing heater lamp assy consists of two heaters, each having a unique heating range different from each other.
• The fusing heater lamp/1 uniformly heats the entire area of the fusing roller.
• The fusing heater lamp/2 heats only the central portion of the fusing roller.
• The fusing heater lamp is turned ON or OFF according to the width of the paper and the surface temperature of the fusing belt.
• For a paper width of 148 mm or less, the fusing heater lamp/2 is used to heat the central portion.
• For a paper width exceeding 148 mm, the surface temperature of the fusing belt is measured and the fusing heater lamp/1 and
the fusing heater lamp/2 are alternately turned ON.
•
Specific controls
No control
• When the main body has been in standby mode for 6 hours, the fusing roller is rotated for a
specified distance.
• When the main body has been in power save mode for 13 days, the fusing roller is rotated for a
specified distance. Afterwards, the main body returns to the power save mode.
• Disable
[1]
[2]
[5]
[4]
P THEORY OF OPERATION > 1. bizhub C4000i/C3300i
[3]
[2]
Pressure roller
[4]
Heating roller thermostat (TS1)
[6]
Heating roller thermistor/Ctr (TH2)
-
P-42
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