Fixing System; Overview/Configuration; Main Parts Of Fixing Assembly - Canon i-SENSYS MF229dw Service Manual

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Technical Overview > Fixing System > Overview/Configuration > Main Parts of Fixing assembly

Fixing System

Overview/Configuration

■ Overview
Fixing/delivery system consists of the fixing film unit, pressure roller and delivery roller etc.
These rollers are driven by the main motor (M1).
The paper that toner is transferred to are heated by the fixing heater of the fixing film unit and
pressured by the pressure roller.
The paper that toner is fused on is delivered from the fixing assembly, detected by the fixing
delivery sensor (PS701) and the paper width sensor (PS702), and then delivered to the
delivery tray by the delivery roller.
M1
[3]
[1] Delivery Roller
[2] Fixing Film Unit
[3] Fixing Pressure Roller
PS701 Fixing delivery sensor
PS702 Paper width sensor
M1 Main motor
2 Technical Overview > Fixing System > Overview/Configuration > Main Parts of Fixing assembly
[1]
SL2
PS702
PS701
[2]
F-2-28
T-2-7

■ Main Parts of Fixing assembly

H1
TH1
TP1
Pressure roller
FIXING TEMPERATURE
signal
Fixing film
H1 : Fixing heater For heating the fixing film (ceramic heater)
TH1 : Main thermistor For controlling the fixing heater temperature (contact type
thermistor)
TP1 : Temperature fuse For detecting the fixing heater overheat (non-contact type fuse)
When the heater overheats, the fuse melts to cut the power
supply to the heater.
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Engine controller
Fixing control
CPU
FIXING HEATER
DRIVE signal
Fixing
heater
drive circuit
Fixing
heater
safety circuit
F-2-29
1 pc
1 pc
1 pc
T-2-8
2-23