Sharp MX-6500N / MX-7500N (serv.man24) Service Manual ▷ View online
MX-7500N DISASSEMBLY AND ASSEMBLY 10 – 41
NOTE: Arrange the connector position as the figure below.
4)
Remove the screws and remove the DFS PWB and CIS PWB.
MX-7500N DISASSEMBLY AND ASSEMBLY 10 – 42
2. Maintenance
A. DSPF section
(1)
Document feed unit
a. Document pickup roller, Paper feed roller
1)
Remove the screw, and remove the paper feed cover.
2)
Remove the paper feed PG upper cover.
3)
Remove the pickup roller holder. Remove the document
pickup roller from the pickup roller holder.
pickup roller from the pickup roller holder.
4)
Remove the paper feed roller.
(2)
Lamp unit
a. Second scan section scanning glass, reflector, scanner
lamp
1)
Remove the screw, and remove the lamp mounting plate.
2)
Clean the second scan section scanning glass.
3)
Remove the screw, and remove the reflector, and the scanner
lamp.
lamp.
Clean the reflector and scanner lamp.
1
2
2
1
1
1
2
3
3
1
2
4
5
MX-7500N DISASSEMBLY AND ASSEMBLY 10 – 43
(3)
Optical unit
a. Mirror
1)
Remove the screw, and remove the mirror base cover.
2)
Clean the mirror.
b. Lens, CCD
1)
Remove the screw, and remove the dark box. Remove the
dust-proof cover.
dust-proof cover.
2)
Remove the lens cover.
3)
Clean the lens and CCD.
(4)
DSPF unit
a. Separation roller
1)
Remove the document feed unit.
2)
Remove the screw, and remove the paper feed PG lower
cover.
cover.
3)
Remove the revere pressure release lever, and remove the
separation roller.
separation roller.
b. Torque limiter
1)
Remove the document feed unit.
2)
Remove the drive unit.
3)
Remove the resin E-ring, and remove the No. 1 registration
roller (Idle).
roller (Idle).
2
1
1
1
2
3
1
2
2
1
2
1
MX-7500N DISASSEMBLY AND ASSEMBLY 10 – 44
4)
Remove the screw. Lift the document paper feed tray and
remove the paper guide.
remove the paper guide.
5)
Remove the screw, and remove the support plate and the
bearing. Remove the roller shaft, and remove the torque lim-
iter.
bearing. Remove the roller shaft, and remove the torque lim-
iter.
c. No. 1 registration roller
1)
Remove the document feed unit.
2)
Clean the No. 1 registration roller.
d. Transport roller 1
1)
Open the upper door unit.
2)
Clean the transport roller 1.
e. No. 2 registration roller
1)
Remove the front cabinet.
2)
Remove the rear cabinet.
3)
Remove the screw, and remove the left rear lower cabinet.
4)
Remove the resin E-ring, and remove the PS knob.
5)
Remove the screw, and remove the paper guide.
Clean the No. 2 registration roller.
3
2
1
1
2
5
2
3
4
1
1
2
1
2
2
1
3
4
1
2
2
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