Xerox Phaser 8400 Service Manual page 174

Check Menu Value Key Table (Continued)
3 Motor Frequency
(hz)
4 FFT Power Ratio
1 (none)
5 Frequency 1
Frequency (hz)
6 FFT Power Ratio
2 (none)
7 Frequency 2
Frequency (hz)
Y-axis Drive Belt Slippage - This test does a chase using a special sheet of preprinted
media and records the y-axis following error. .
Test ID# R Definition
#
Y-axis Drive Belt 0 Initial Peak Y-
Slippage axis FE (mpts)
1 Max Following
Peak Y-axis FE
(mpts)
2 Average Y-axis
FE (mpts)
General Troubleshooting
Reports the current motor
frequency.
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.
Reports the frequency of the
most powerful FFT frequency
(not including the drum or
motor).
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.
Reports the frequency of the
second most powerful FFT
frequency (not including the
drum or motor).
Results Interpretation/Actions
Reports the amplitude of the
first Y-axis following error peak.
Reports the amplitude of the
maximum Y-axis FE peak after
the first.
Reports the average of the Y-
axis following error during the
roller down portion of the
transfix operation.
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