October 2012
6-46
ColorQube 8570/8870 Service Manual
Noise Troubleshooting, OF1
Revised, 3rd Revision - Xerox Internal Use Only
General Troubleshooting
OF1 Drum Ground Plane Rubbing
The Drum ground plane on the left side of the Exit Module is held in place by a post feature of
the Exit Module. If the post breaks, the ground plane can come into contact with the Drum Pul-
ley resulting a metallic rubbing noise.
Troubleshooting Reference
Applicable Part (Chapter 5 - Parts List)
•
Exit Module Assembly,
PL 3.1 Item 13
Procedure
Remove the Left Side Cover (
REP 1.10
) to inspect the Exit Module. Check that the post of the
Exit Module is not broken. Is the post broken (see
Figure 1
)?
Y
N
Troubleshooting complete.
Replace the Exit Module (
REP 3.13
).
Figure 1 Checking the Exit Module
Drum Knocking
(Drum Belt)
A defect in the Drum Belt can cause a
low pitch knocking sound to occur dur-
ing the imaging stage of printing.
OF2
Drum Knocking
(Drum Belt)
Y-Axis Motor
Bearing
A defective Y-Axis Motor bearing can
cause a metallic brushing or scraping
sound during imaging.
OF3
Y-Axis Motor Bear-
ing
Tray 1 - Squeak-
ing
Tray 1 may make a squeaking noise
when it picks the last sheet from a stack
of paper.
OF4
Tray 1 - Squeaking
Tray 1 - Buzzing The printer makes a buzzing, grinding
sound during the print process when
Tray 1 Roller is out of position.
OF5
Tray 1 - Buzzing
Non-Printing
Process Motor
Gear Box (Trans-
fix Output Gear)
A stripped transfix output gear in the
Process Motor Gear Box can cause a
tooth skipping noise during startup.
OF6
Process Motor
Gear Box (Trans-
fix Output Gear)
Process Motor
Gear Box (Com-
pound/Helical
Gear)
A stripped compound or helical gear in
the Process Motor Drive can cause a
tooth skipping noise during startup and
printing.
OF7
Process Motor
Gear Box (Com-
pound/Helical
Gear)
Gear Skipping
(HM Gear Train /
MP Gear Box)
It could be due to a loose Head Mainte-
nance Gear Train on the left side of the
Exit Module, or a problem within the
Media Path Gear Box (007K20040,
Media Drive with 2 Clutches).
OF8
Gear Skipping
Power Down
The printer is in progress of powering
off.
N/A
Power Down
Table 3 Abnormal Noises Due to Failures
Defect
Description
Procedure
Noise Sample
Summary of Contents for COLORQUBE 8570
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