Drum Cleaning Drive - Ricoh MP 7503SP Field Service Manual

5. Detailed Descriptions
No.
1
2
3
4
A small cam vibrates the cleaning blade slightly to keep the blade loose on the surface of the drum so it
does snag on the drum surface. At the end of every job, the drum motor stops and reverse rotates the
drum briefly to remove any toner that has stuck to the edge of the cleaning blade. The arc of this reverse
rotation is about 5 mm.
No.
1 Rotating Cam
2 Cleaning Blade

Drum Cleaning Drive

The drum motor rotates the drum and drives the cleaning mechanism through a single gear train. A large
flywheel on the shaft of the drum reduces jitter during drum rotation. The drum speeds are different for
each model of this series:
• D223/D224 (Thick Paper 3, 4): 270 mm/sec.
• D223/D224 (Normal Paper, Thick Paper 3, 4): 362 mm/sec.
1046
Name
Cleaning Blade
Drum Cleaning Roller (Brush)
Toner Collection Coil
Agitator
Name