Xerox PHASER 8500 Service Manual page 163

Phaser 8400/8500/8550/8560 Color Printer Service Manual
This test drives the X-Axis Motor in each direction until the Printhead stalls
into the stops. Next, the test moves the Printhead into the clear and performs
an on the fly reversal.
X-Axis Drive
R# Definition
0 Right Stall Power
Level (watts)
1 Left Right Distance
(in)
2 Right Left Traverse
Average Power
Level (watts)
3 Right Left Traverse
Power Ripple
(watts)
4 Left Right Traverse
Power Average
Level (watts)
5 Left Right Traverse
Power Ripple
(watts)
6 Turnaround Power
Blip Width (watts)
Typical Typical
Value Value (8500/
(8400) 8550/8560)
5 to 10 .5 to 3.3
0.32 to -.15 to .5
0.48
3.5 to 8.5 .5 to 1.55
.20 to 1.8 -0.5 to 1.0
4.0 to 8.5 .5 to 1.75
1.2 to 1.5 -.01 to .05
.02 to .11
General Troubleshooting
Actions
Reports the motor/drive
electronics stall power.
An abnormal level may indicate
a motor/motor drive problem.
Reports the distance between
the left and right stall points.
An abnormal value may
indicate an problem that
restricts the range of motion
(pinched cable, etc.).
Reports the average power
required to move the printhead
from the right hard stop to the
left hard stop. An abnormal
value may indicate a problem
with the lead screw or
printhead bearings
(lubrication, etc.).
Reports ripple in the power
level needed to move the
printhead from the right hard
stop to the left hard stop. An
abnormal value may indicate a
problem with roughness in the
drive mechanism or an
interference with the printhead
motion.
Same as R2 except for the
other direction of motion.
Same as R3 except for the
other direction of. motion.
Reports the width of the
momentary drop in the
required drive power when the
printhead motion is being
reversed. An abnormal value
may indicate an unusual
amount of play in the drive
mechanism.
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