d-Color MF4003/MF3303
P THEORY OF OPERATION > 1.
d-Color MF4003/MF3303
P-47
Mode 1
• 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.
Mode 2
• Disable
(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.
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[1]
Fusing belt
[2]
Pressure roller
[3]
Fusing heater lamp (HL1)
[4]
Heating roller thermostat (TS1)
[5]
Heating roller temperature sensor (TEMS)
[6]
Heating roller thermistor/Ctr (TH2)
[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.
•
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[1]
Front of machine
[2]
Fusing heater lamp/1
[3]
Fusing heater lamp/2
[4]
Back of machine
[5]
Heating roller thermistor/Edg (TH1)
[6]
Heating roller thermistor/Ctr (TH2)
[7]
Heating roller temperature sensor (TEMS)
[8]
Heating roller thermostat (TS1)
Y119930-3
Service Manual
Summary of Contents for d-Color MF 4003
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