Read Sharp AR-C170 (serv.man24) Service Manual online
AR-C170M DESCRIPTIONS OF EACH SECTION 7 - 3
d. Fusing temperature control
The temperature sensor is provided at the center of the upper and
the lower heat rollers.
the lower heat rollers.
The temperature sensor at the center detects the heat roller tem-
perature and controls the heater lamp to keep the fusing tempera-
ture at the specified level.
perature and controls the heater lamp to keep the fusing tempera-
ture at the specified level.
The fusing temperature is switched according to the machine con-
dition and paper type selected.
dition and paper type selected.
(Example: 200V series)
B. Disassembly/Assembly/Maintenance
(1) Fusing section maintenance target parts
✕
: Check (Clean, replace, or adjust as necessary.)
❍
: Clean
▲
: Replace
∆
: Adjust
✩
: Lubricate
❏
: Shift position
Upper heat roller
Lower heat roller
Ready state
160°C
145°C
Power save mode
138°C
OFF
Print mode
Normal paper
B/W
B/W
160°C
145°C
OHP sheet
170°C
155°C
Heavy paper 1
170°C
135°C
Heavy paper 2
175°C
145°C
Envelope
180°C
145°C
Unit name
No.
Part name
When
calling
50K
100K
150K
200K
250K
300K
350K
400K
Remark
Fusing section
1
Upper heat roller
✕
✕
▲
✕
▲
✕
▲
✕
▲
Replace at 100K or
within 2 years.
within 2 years.
2
Lower heat roller
✕
✕
▲
✕
▲
✕
▲
✕
▲
Replace at 100K or
within 2 years.
within 2 years.
3
Heat roller gear
✕
✕
▲
✕
▲
✕
▲
✕
▲
100K
4
Heat roller bearing
✕
✕
▲
✕
▲
✕
▲
✕
▲
100K
5
Separation pawl
✕
✕
▲
✕
▲
✕
▲
✕
▲
100K
6
Thermistor
✕
✕
▲
✕
▲
✕
▲
✕
▲
100K
—
Bearings
✕
✕
✕
✕
✕
✕
✕
✕
✕
7
Gears
✕
✩
✩
✩
✩
✩
✩
✩
✩
8
Paper guides
❍
❍
❍
❍
❍
❍
❍
❍
❍
9
Paper exit roller
✕
✕
✕
✕
✕
✕
✕
✕
✕
—
Fusing unit
✕
▲
✕
▲
✕
▲
✕
▲
Replace the unit at
100K or within 2 years.
100K or within 2 years.
6
6
1
2
4
4
4
4
5
8
9
3
6
6
1
2
5
4
4
4
4
5
9
7
8
3
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