Fig. 3-57
Heater lamp
control circuit
Temperature
control circuit
ASIC
Pressure roller
side thermostat
Pressure roller
center thermostat
Fuser belt
thermostat
Center heater lamp
drive circuit
(
TR3
)
Side heater lamp
drive circuit
(
TR2
)
Sub heater lamp
drive circuit
(
TR1
)
(
for MJC,MJD
)
Center heater lamp
Side heater lamp
Sub heater lamp
(
for MJC,MJD
)
Pressure roller
Coil output
AC inputFuse
Switching regulator
Fuser unit
IH board
Noise
filter
Center heater lamp control signal
IH coil energization permitting signal
IH status signal
Switching signal of power setting
Photocoupler power supply
Sub heater lamp control signal
(
for MJC,MJD
)
Side heater lamp control signal
LGC board
L
N
Noise
filter
Breaker
Breaker
L
N
5VSW
Fuser belt
Pressure roller
edge thermistor
Pressure roller
center thermistor
Pressure roller
side thermistor
Fuser belt
center thermopile
Fuser belt rotation
detection sensor
Fuser belt
edge thermistor
Fuser unit contact / release
detection sensor
Control circuit
including CPU
IH power supply /
drive circuit
IH coil
L
N