Sharp AR-M550 (serv.man12) Service Manual ▷ View online
AR-M550/M620 DETAILS OF EACH SECTION 6 - 76
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
Drum
peripheral
section
peripheral
section
1
Drum
✕
▲
▲
▲
▲
▲
▲
▲
▲
2
Cleaning blade
✕
▲
▲
▲
▲
▲
▲
▲
▲
3
Toner reception seal
✕
▲
▲
▲
▲
▲
▲
▲
▲
4
Side seal F/R
▲
▲
▲
▲
▲
▲
▲
▲
5
Drum separation pawl
✕
▲
▲
▲
▲
▲
▲
▲
▲
6
Discharge lamp
✕
❍
❍
❍
❍
❍
❍
❍
❍
7
Image density sensor
✕
❍
❍
❍
❍
❍
❍
❍
❍
8
OPC drum marking sensor
✕
❍
❍
❍
❍
❍
❍
❍
❍
9
Side seal R base sheet
✕
▲
✕
▲
✕
▲
✕
▲
10 Cleaning brush
✕
✕
✕
✕
✕
✕
✕
✕
1
6
8
7
10
4
2
5
3
4
9
AR-M550/M620 DETAILS OF EACH SECTION 6 - 77
(2) Maintenance and parts replacement
(List of Replacement Parts)
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
Drum
peripheral
section
peripheral
section
9
Sawtooth
❍
▲
▲
▲
▲
▲
▲
▲
▲
10 Screen grid
✕
▲
▲
▲
▲
▲
▲
▲
▲
11 MC cleaner
▲
▲
▲
▲
▲
▲
▲
▲
9
10
11
No.
Unit
Parts
a
Process unit
1
OPC drum
✕▲
2
Separation pawl
✕▲
3
Cleaning blade
✕▲
4
Toner receiving seal
✕▲
5
Side seal F/R
▲
6
Cleaning brush
✕
7
Process adsorption plate
8
Drum separation pawl solenoid
9
OPC drum cleaner temperature
sensor
sensor
10
Discharge lamp
✕❍
11
Image density sensor
✕❍
12
OPC drum marking sensor
✕❍
a-1
a
a-10
a-12
a-8
a-9
a-7
a-11
a-6
a-5
a-3
a-2
a-4
a-5
AR-M550/M620 DETAILS OF EACH SECTION 6 - 78
a. Process unit
1) Open the front door.
2) Open the process cover.
3) Open the left door.
4) Remove the MC charger unit.
5) Remove the blue screw.
6) Unfix the drum to remove the bearing.
7) Pull out the process unit by clasping the bolt head.
a-1. OPC drum
1) Disconnect the connectors.
2) Remove the blue screw to open the lower frame.
3) Gently remove the drum, guide and all.
4) Remove the guide.
NOTE:
(OPC layer break-off on both sides of the OPC drum)
The OPC layer of a certain area of the OPC drum may break off due to
rotational friction. The OPC layer break-off generated in the area
shown below will not affect print images. Therefore, the drum can be
used without replacement.
rotational friction. The OPC layer break-off generated in the area
shown below will not affect print images. Therefore, the drum can be
used without replacement.
12mm
14mm
AR-M550/M620 DETAILS OF EACH SECTION 6 - 79
a-2. Separation pawl
1) Remove the OPC drum. (See “a-1. OPC drum” in this section)
2) Remove the plastic E-ring.
3) Remove the separation pawl.
a-3. Cleaning blade
1) Remove the OPC drum. (See “a-1. OPC drum” in this section)
2) Remove the cover.
3) Remove the cleaning blade.
a-4. Toner receiving seal
1) Remove the OPC drum. (See “a-1. OPC drum” in this section)
2) Remove the toner receiving seal.
a-5. Side seal
1) Remove the OPC drum. (See “a-1. OPC drum” in this section)
2) Remove the right and left side molds.
3) Affix the right and left side molds in the designated positions.
a-6. Brush roller
1) Remove the OPC drum. (See “a-1. OPC drum” in this section)
2) Remove the toner receiving seal.
3) Remove the blue screw to remove the lever.
4) Remove the brush roller.
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