MX-M316N OPERATIONAL DESCRIPTIONS 11 – 25
14. Fusing section
A. Mechanism relation diagram
B. Fusing unit drive
The driving of fuser unit is; the driving force is transported to fuser
roller, thru the Main motor (MM) and connection gears, based on the
controlling signal from PCU.
C. Heater lamp drive
The surface temperature of the heat roller detected by the thermistor is
sent to the PCU.
When the temperature is lower than the specified level, the heater
lamp ON signal is sent from the PCU to the heater lamp drive circuit on
the HL PWB.
The power triac in the heater lamp drive circuit is turned on, and the
AC power is supplied to the heater lamp, lighting the lamp and heating
the heat roller.
To prepare for an abnormally high temperature of the heat roller, the
thermostat is provided for safety.
When the thermostat is opened, the power supply (AC line) to the
heater lamp is cut off.
MM
2
1
TS_UM
TH_US
TH_MY
3
HL_PR
HLout
TS_UM
2
2
2
3
Signal name Name Function and operation
MM Main motor Drives the most of the driving parts except the duplex section, the toner section and the scanner sections.
HL_PR Heater lamp control relay Turns ON/OFF the control of the heater relay.
HLout Heater lamp Turns ON/OFF the heater lamp.
TH_MY Thermistor UM Regulates Heat Roller Temperature at the end of the Heat Roller.
TH_US Thermistor US Regulates Heat Roller Temperature at center of the Heat Roller.
TS_UM Thermostat UM
Fusing roller overheat protection. Cuts off power supply to heat lamp when over heat condition is
determined.
No. Name Function and operation
1 Heat roller Applies heat and pressure to toner on paper to fuse it on paper.
2 Upper separation pawl Mechanically separates paper which was not naturally separated from the heat roller (heating).
3 Pressure roller Presses toner on paper to fuse.
4 Lower separation pawl Mechanically separates paper which was not naturally separated from the heat roller (heating).
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