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Phaser 8400/8500/8550/8560 Color Printer Service Manual 4-15
General Troubleshooting
8 CW On fe settling
time (sec).
0.010 to
0.20
0 to .2 Reports the time it takes the
MP motor servo system to
"settle down" after the sudden
addition of the deskew shaft
load.
A longer time could indicate a
looseness in the deskew shaft
assembly or a slipping clutch.
9 CW On average fe. -610 to
-220
-3 to 1.3 Reports the average effort
required to rotate the deskew
shaft in the CW direction at a
constant velocity.
An unusual value could
indicate a difference in the
composition and/or number of
the rollers, the nip pressure,
or out of range mechanical
dimensions due to wear or
contamination (such as paper
dust increasing the effective
diameter of a roller).
10 CW On fe ripple. 110 to 400 -2.25 to
-1.0
Reports the variation of effort
required to rotate the deskew
shaft in the CW direction at a
constant velocity.
A larger value could indicate
particles in the gears or non
uniform contamination of a
roller (causing a lump).
11 CW Off fe settling
time (sec).
0.010 to
0.20
.01 to .05 Reports the time it takes the
MP motor servo system to
"settle down" after the sudden
release of the deskew shaft
load.
A larger value could indicate a
dragging or slow to release
clutch.
Deskew Shaft (Continued)
R# Definition
Typical
Value
(8400)
Typical
Value
(8500/
8550/8560) Actions