21-8.Fusing Temperature Control - Minolta CF1501 Service Manual

21-8. Fusing Temperature Control
• Heater lamps are turned ON and OFF to keep the surface temperatures of the Heating
Roller and Fusing Roller at predetermined levels.
• The surface temperatures of the Heating Roller and Lower Fusing Roller are detected by
thermistors that convert temperatures to corresponding electrical signals.
• If the surface temperatures of the Heating Roller and Lower Fusing Roller run inordi-
nately high, power to the heater lamps is shut down.
• The fusing temperature during copy cycles can be fine-adjusted using "Tech. Rep.
Mode."
Part Name
• Turns ON during a warm-up cycle.
• Turns ON during a copy cycle (large size CD width 217 mm or
Heating Roller
Heater Lamp 1
• Turns ON in the standby state after a warm-up cycle.
• Turns ON during a copy cycle (small size CD width 216 mm or less)
Heating Roller
• Set temperatures are the same as those for Heating Roller Heater
Heater Lamp 2
• Turns ON during a warm-up cycle.
Lower Fusing
• Turns ON during a copy cycle
Roller Heater
• 130 °C
Lamp
• Turns ON in the standby state after a warm-up cycle.
• Detects the surface temperature of the Heating Roller.
• Temperature control in standby state: 170 °C
Fusing Thermistor
• Energy Saver temperature control: 160 °C
1
• Abnormally high temperature of 220 °C of the Heating Roller
• Detects the surface temperature of the Lower Fusing Roller.
• Temperature control in standby state: 160 °C
Fusing Thermistor
• Energy Saver temperature control: 140 °C
2
• Abnormally high temperature of 190 °C of the Lower Fusing Roller
• Abnormally high temperature of 230 °C of the Heating Roller
Fusing Thermostat
1
• Abnormally high temperature of 200 °C of the Lower Fusing Roller
Fusing Thermostat
2
more)
Plain paper
OHP
Thick paper 1
Thick paper 2
Lamp 1.
detected: C0520
detected: C0521
detected: Shuts down power supply to Heating Roller Heater Lamp
1.
detected: Shuts down power supply to Lower Fusing Roller Heater
Lamp.
M-94
Function
Set Temperature (°C)
Ambient Temperature
Less than 18 °C 18 °C or more
185
180
185
195
180
180
185
195