Ih Fixing Method (Outline) - Canon iR6570 series Service Manual

9.1.3 IH Fixing Method (outline)

The machine uses the IH fixing method.
[1] Fixing roller
[2] Excitation coil
[3] Core
[4] Pressure roller
Note:
The arrow in the figure shows the direction of paper movement.
INV_ON: fixing heater power ON signal
PWM_OUT: fixing heater power supply control signal
DCON: DC controller PCB
IH DRIVER: fixing heater driver PCB
MEMO:
The term IH stands for "induction heating."
When high-frequency current is supplied to a coil arranged inside a heater unit, a high-frequency magnetic field develops around the coil. The filed serves
to permit the flow of eddy current (induction current) to the fixing roller, causing the roller to heat on its own.
[2] Main thermistor (THM1)
[3] Thermal switch (TP1)
[4] Shutter thermistor (THM3)
[1]
[3]
[4]
J2402
IH DRIVER
[6] Flux blocking plate (shutter)
[7] Shutter HP sensor (PS53)
[2]
F-9-3
J1040
J130
INV_ON
PWM_OUT
F-9-4
DCON
Chapter 9
0009-3746
9-3