Sharp MX-M550U Service Manual page 364

E. Fusing temperature control
The temperature sensor is provided at the center of the heat roller
and the sub heat roller.
The roller temperature is detected by the installed temperature sen-
sor, and the heater lamp is controlled so that the temperature is
maintained at the specified level.
In addition, the fusing temperature is switched according to the kind
of paper.
Mode Paper
Ready Standard paper
condition
Thick paper
Print mode
Tab paper
Postcard
Pre-heat –-
F. Cleaning operation
The fusing roller removes toner and dusts from the heat roller and
the pressure roller surfaces by the following three methods.
• Sub-heat roller: Clean the sub heat roller with the cleaning sheet.
• Pressure roller: Mechanical cleaning by the CL roller.
• Heat roller: Mechanical cleaning by the web roller.
4
2
8
3
1
5
No.
1 Cleaning sheet
2 Pressure roller
3 Discharge brush
4 Heat roller
5 Sub heat roller
6 CL roller
7 Web roller
8 Lower CL roller DG2
Fusing roller Sub heat roller
185°C 185°C
220°C 180°C
220°C 180°C
200°C 200°C
140°C 140°C
7
6
Name
MX-M700N FUSING SECTION N – 3
3. Disassembly and assembly
A. Fuser section
No. Unit
Fusing unit a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
p
q
r
s
t
u
v
w
x
y
(1)-t
(1)
(1)-h
(1)-g
(1)-j
(1)-k
(1)-d
(1)-x
(1)-l
(1)-k
(1)-c
(1)-c
(1)-a
(1)-g
(1)-h
(1)-i
(1)-j
(1)-y
(1)-v
(1)-w
(1)-t
(1)-u
Parts
Web end sensor
Web motor
Pressure bearing
Pressure roller
Web roller
Web bearing
Heat roller separation pawl
Pressure roller separation pawl
Pressure roller
CL roller
CL roller bearing
Lower CL roller DG2
Heater lamp main
Heater lamp sub
Heat roller gear
Heat roller
Thermistor (upper)
Thermostat (upper main)
Thermostat (upper sub)
Thermostat (lower)
Thermistor (lower)
Cleaning sheet table
Sub heater lamp
Sub heat roller bearing
Sub heat roller
(1)-g
(1)-k
(1)-x
(1)-h
(1)-o
(1)-s
(1)-r
(1)-q
(1)-u (1)-c
(1)-q
(1)-f (1)-b
(1)-e
(1)-q
(1)-r s
(1)-n
(1)-m
(1)-p
(1)-l
Mainte
nance
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✕ ▲
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✕ ▲
✕ ▲
▲
✕ ▲
✕
✕ ▲
✕
✕
✕ ▲
▲
✕ ▲
(1)-o
(1)-k
(1)-f