Xerox Phaser 8500 Service Manual

4-38 Phaser 8400/8500/8550/8560 Color Printer Service Manual
General Troubleshooting
Rotates the drum at a constant velocity and samples the Y-Axis position. Uses
the data to determine Y-Axis motor and drum vibration and the most
significant other vibrational frequencies.
Y-Axis Geometry
R# Definition
Typical
Value
(8400)
Typical
Value (8500/
8550/8560)
Actions
0 Drum Normalized
FFT Power (none)
-3900 to
6000
Reports the normalized FFT
power amplitude of the drum
frequency. The normalized
value is generated by dividing
the drum FFT power by
1.0xE13.
1 Drum Frequency
(hz)
1.25 to 7.5 Reports the current drum
frequency.
2 Motor FFT Power
Ratio (none)
-200 to 250 Reports the ration of the FFT
power amplitude of the motor
frequency to the FFT power
amplitude of the drum
frequency.
3 Motor Frequency
(hz)
44 to 48 Reports the current motor
frequency.
4 FFT Power Ratio 1
(none)
-20000 to
25000
Reports the ratio of the FFT
power amplitude of the most
powerful FFT frequency (not
including the drum or motor),
to the FFT power amplitude of
the drum frequency.
5 Frequency 1
Frequency (hz)
45 to 110 Reports the frequency of the
most powerful FFT frequency
(not including the drum or
motor).
6 FFT Power Ratio 2
(none)
-14000 to
17000
Reports the ratio of the FFT
power amplitude of the second
most powerful FFT frequency
(not including the drum or
motor), to the FFT power
amplitude of the drum
frequency.
7 Frequency 2
Frequency (hz)
-70 to 140 Reports the frequency of the
second most powerful FFT
frequency (not including the
drum or motor).

Xerox Phaser 8500 Specifications

General

Brand	Xerox
Model	Phaser 8500
Category	Printer
Language	English