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Phaser 8400/8500/8550/8560 Color Printer Service Manual 4-13
General Troubleshooting
Check Shafts Menu
Runs the Media Path Drive train and engages the Deskew Clutch on the fly
then disengages the clutch. The test is repeated in both directions to
determine clutch characteristics, steady state drive requirements, bearing
status, etc
6 110 V Coil Average
Power (watts)
.2 to 1.0 Reports the average power
during the constant portion of
the profile.
7 110 V Coil Min
Power (watts)
.2 to .45 Reports the min power
following power off.
8 110 V Coil Peak
Power Time (sec)
Reports time after solenoid
power on that the peak power
occurred.
9 110 V Coil Initial
Average Power
(watts)
Reports the average power
following power on.
Deskew Shaft
R# Definition
Typical
Value
(8400)
Typical
Value
(8500/
8550/8560)
Actions
0 Time to CCW On
peak fe (sec).
0.01 to
0.04
.01 to.04 Reports how long it takes the
MP motor servo system to
react to the sudden addition of
the deskew shaft load.
Larger values may show a
slipping/slow to engage
clutch.
1 CCW On peak fe. 540 to 750 2.0 to 8.0 Reports peak effort needed to
accelerate the deskew shaft
load. A smaller value could
indicate a slipping clutch.
2 CCW On fe settling
time (sec).
0.017 to
0.21
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.
Drum Heater Relay (Continued)
R# Definition
Typical
Value
(8400)
Typical
Value
(8500/
8550/8560) Actions