Sharp AR-M620 (serv.man16) Service Manual ▷ View online
AR-M550/M620 DETAILS OF EACH SECTION 6 - 104
D. Maintenance and parts replacement
(1) Maintenance list
✕
: Check (Clean, replace, or adjust as necessary.)
❍
: Clean
▲
: Replace
∆
: Adjust
✩
: Lubricate
❏
: Shift position
AR-M550U/M550N (PM: 250K)
When
calling
250K 500K 750K 1000K 1250K 1500K 1750K 2000K
Remark
AR-620U/M620N (PM: 300k)
300K 600K 900K 1200K 1500K 1800K 2100K 2400K
Unit name No.
Part name
Fusing
section
section
1
Heat roller
✕
▲
▲
▲
▲
▲
▲
▲
▲
2
Pressing roller
✕
▲
▲
▲
▲
▲
▲
▲
▲
3
Sub-heat roller
✕
▲
▲
▲
▲
▲
▲
▲
▲
4
Cleaning sheet
✕
∆
∆
▲
∆
∆
∆
∆
∆
5
Fusing cleaning scraper
✕
▲
▲
▲
▲
▲
▲
▲
▲
6
Heat roller separation pawl
✕
▲
▲
▲
▲
▲
▲
▲
▲
7
Pressing roller separation pawl
✕
▲
▲
▲
▲
▲
▲
▲
▲
8
Thermistor
✕
✕
✕
✕
✕
✕
✕
✕
✕
Paper dust removal
is required.
is required.
9
Heat roller gear
✕
✕
✕
✕
✕
✕
✕
✕
UKOG-0235FCZZ
10 Sub-heat roller bearing
▲
▲
▲
▲
▲
▲
▲
▲
11 Paper guides
❍
❍
❍
❍
❍
❍
❍
❍
❍
12 Shaft (Grease)
✩
✩
✩
✩
✩
✩
✩
✩
UKOG-0235FCZZ
8
3
11
6
7
7
6
2
1
8
8
10
12
12
9
12
12
10
5
4
AR-M550/M620 DETAILS OF EACH SECTION 6 - 105
(2) Maintenance and parts replacement
(Replacement parts)
a. Fusing unit
1) Open the left door unit.
2) Remove the blue fixing screw on the front side.
3) Release the fixing members on the rear frame side.
4) Release the right and left lock levers of the fusing unit to remove
the fusing unit.
No.
Unit
Parts
a
Fusing unit
1
Heat roller separation pawl
2
Pressing roller separation pawl
✕▲
3
Heat roller
✕▲
4
Heater lamp 1
5
Heater lamp 2
6
Heat roller gear
✕▲
7
Thermistor (upper)
✕▲
8
Pressing roller
✕▲
9
Cleaning scraper
✕▲
10
Paper guide
❍
11
CL brush
12
Sub-heat roller
▲
13
Sub-heat roller bearing
▲
14
Thermistor (lower)
▲
15
Sub heater lamp
16
Thermistor 1
17
Thermistor 2
18
Thermistor 3
19
Cleaning sheet
✕▲
a-7
a-3
a-6
a-13
a-13
a-9
a-3
a-3
a-10
a-11
a-1
a-1
a-1
a-2
a-2
a-2
a-8
a-9
a-19
a-12
a-15
a-18
a-18
a-14
a-14
a-4
a-5
a-16
17
a-7
a-7
a-16
a-17
2
1
AR-M550/M620 DETAILS OF EACH SECTION 6 - 106
a-1. Heat roller separation pawl
1) Remove the fusing unit. (See “a. Fusing unit” in this section)
2) Remove the heat roller separation pawl unit.
3) Remove the heat roller separation pawl.
a-2. Pressing roller separation pawl
1) Remove the fusing unit. (See “a. Fusing unit” in this section)
2) Open the pressure roller separation pawl unit.
3) Remove the pressure roller separation pawl.
a-3. Heat roller
a-4. Heater lamp 1
a-5. Heater lamp 2
a-6. Heat roller gear
a-7. Thermistor (upper)
1) Remove the fusing unit. (See “a. Fusing unit” in this section)
2) Alternately loosen the screws to release pressure.
3) Remove the blue screw to open the fusing unit.
4) Remove the lamp fixing screw.
5) Remove the heater lamp 1 and 2.
AR-M550/M620 DETAILS OF EACH SECTION 6 - 107
6) Remove the heat roller unit.
7) Clean the upper thermistor.
8) Remove the ring to remove the gear bearing.
[Caution when Attaching]
• Affix the lamp fixing screw from the opposite side of the drive.
a-8. Pressing roller
1) Remove the fusing unit. (See “a. Fusing unit” in this section)
2) Release the pressure. (See “a-4. Heater lamp 1” in this section)
3) Remove the blue screw to open the fusing unit.
4) Remove the fusing roller (pressing) unit.
5) Remove the bearing from the fusing roller (pressing).
[Note for assembly]
• Wind paper with the scraper tip without scratching the pressure
roller, and insert it.
• When inserting, be careful not to deform the scraper.
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