Canon imageCLASS MF264dw - Protection Function

Fixing heater
control circuit
RL101
Fixing film unit
Fixing unit
Pressure roller
H1：Fixing Heater
TH1
TP1
TH1：Thermistor
TP1：Thermoswitch
Low Voltage Power Supply PCB
Engine controller PCB
DC controller
FREQSNS
RLYD
FSRD
FSRTHSNS
Fixing heater
safety circuit
CPU
Relay control
circuit
Zerocross circuit
（220 to 240V only）
H1
Protection Function
Overview
This machine has a function to detect abnormal temperature rise in the Fixing Unit and cut off the power supply to the Fixing
Heater.
Description
This machine is equipped with 4 types of protection function as follows.
• DC Controller
• Fixing Heater safety circuit
• Thermoswitch
• Down Sequence Control
2. Technology
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