AR-M550 (serv.man12). (6b) Laser scan unit, Image process section, Scanner section, Fusing section, SPF section - Sharp Copying Equipment Service Manual (repair manual). Page 71

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AR-M550/M620  DETAILS OF EACH SECTION  6 - 130
[Other]
A. Maintenance and parts replacement
(1) Maintenance list
: Check (Clean, replace, or adjust as necessary.)
: Clean
: Replace
: Adjust
: Lubricate
: Shift position
(2) Maintenance and parts replacement
(Replacement parts)
a-1. SPF fan motor
1) Remove the rear cover. (See “a-1. Cabinet” in the previous sec-
tion, “[External outfit section]”)
2) Disconnect the connector, and remove the SPF fan motor.
a-2. SPF PWB
1) Remove the rear cover. (See “a-1. Cabinet” in the previous sec-
tion, “[External outfit section]”)
2) Disconnect the connector, and remove the SPF PWB.
b. Drive unit 
1) Remove the rear cover. (See “a-1. Cabinet” in the previous sec-
tion, “[External outfit section]”)
2) Remove the electromagnetic clutch. 
3) Remove the drive unit.
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
SPF Drive 
section
1
Gears (Grease)
UKOG-0307FCZZ
2
Belts
1
2
2
2
1
1
1
No.
Unit
Parts
a
1
SPF fan motor
2
SPF  PWB
b
Drive  unit
a-1
a-2
b
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