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Phaser 8400/8500/8550/8560 Color Printer Service Manual 4-17
General Troubleshooting
4 CCW On fe ripple. 25 to 100 .08 to .31 Reports the variation of effort
needed to rotate the wiper
shaft in the CCW direction at a
constant velocity. A larger
value could indicate particles
in the gears or non uniform
contamination of a roller
(causing a lump).
5 CCW Off fe setting
time (sec).
0.004 to
0.15
.015 to .20 Reports the time it takes the
MP motor servo system to
“settle down” after the sudden
release of the wiper shaft load.
A larger value may show a
dragging or slow to release
clutch.
6 Time to CW On
peak fe (sec).
0.005 to
0.20
.02 to .045 Reports how long it takes the
MP motor servo system to
react to the sudden addition of
the wiper shaft load.
Larger values may indicate a
slipping or slow to engage
clutch.
7 CW On peak fe. -275 to
-10
-.15 to 0.4 Reports the peak effort
required to accelerate the
wiper shaft load.
A smaller value could indicate
a slipping clutch.
8 CW On fe settling
time (sec).
-10 to 1 -.04 to .23 Reports the time it takes the
MP motor servo system to
"settle down" following the
sudden addition of the wiper
shaft load.
A longer time could indicate a
looseness in the wiper shaft
assembly or a slipping clutch.
Wiper Shaft (Continued)
R# Definition
Typical
Value
(8400)
Typical
Value
(8500/
8550/8560) Actions