Xerox Phaser 8400 Service Manual

General Troubleshooting 4-43
Y-axis Geometry
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.
R# Definition
Typical
Value
(8400)
Typical
Value
(8500/
8550) 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 8400 Specifications

General

Brand	Xerox
Model	Phaser 8400
Category	Printer
Language	English