Noise From The Fusing Drive Unit - Konica Minolta bizhub C650 Technical Bulletin

C451 / C550 / C650
C452 / C552 / C652 / C552DS / C652DS
SYMPTOM
A squeaking noise may be generated by the fusing drive gear shaft
and bushing.
CAUSE
The drive gear shaft is mostly D-shaped. As the shaft turns, it can scrape
the inside of the round bushing that supports it, increasing the play between
the shaft and the bushing and causing noise.
The shape of the shaft has been changed and the bushing material was
changed. At the same time, several other parts were changed.
Bushing
D-shaped shaft
Old Style Part No.
A00JR75800 Fusing drive unit (C451, C550,
C650)
A0P0R73800 Fusing drive unit (552, 652, C452,
C552, C652, C552DS, C652DS)
A00J231801 Paper exit shaft 1
1200312109 Bushing
A00J232100 Bearing 1
A00J230700 Gear 33T
— Pin
Fuser kit*
* All 5 parts in the kit must be installed as a set. They can modify either style fusing drive unit.
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Noise from the Fusing Drive Unit

552 / 652
Gear
Description
D-shaped shaft
New Style Part No.
A00JR75811
A0P0R73811
A00J231812 Old = long "D"; NEW = short "D"
A0P0232500 Old = white; NEW=black
A00J232111 Old = white; NEW=black
A00J230711 NEW has groove for pin
V231201050
U226-0950 Includes all parts shaded red
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Notes
December 19, 2011