Xerox Phaser 8400 Service Manual

4-22 Phaser 8400/8500/8550 Color Printer
10 CW On fe ripple. 20 to 75 0 to .4 Reports the variation of effort
needed to rotate the wiper shaft
in the CW direction at a constant
velocity.
A larger value may show
particles in the gears or non
uniform contamination of a roller
(causing a lump).
11 CW Off fe settling
time (sec).
-5 to .01 .02 to .22 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 could indicate a
dragging or slow to release
clutch.
Tray 1 Pick Shaft
Runs the media path drive train and engages the tray 1 pick solenoid on the fly. The pick shaft
goes through two full revolutions while drive requirements are determined.
R# Definition
Typical
Value
(8400)
Typical
Value
(8500/
8550) Actions
0 Off average MP fe.
(mpts).
800 to
1500
Reports the average MP fe
during the run in interval before
the pick shaft is engaged.
1 On response time.
(sec).
-1.5 to
0.95
Reports the time between pick
solenoid activation and a
detectable response from the
MP drive system indicating that
pick shaft engagement. A higher
value of R1 could indicate that
the missing tooth gear engaged
more slowly than usual, which
could be a problem with the lift
plate spring tension, the
condition of the sliding surfaces
between the cams and the
followers, drag on the pick shaft,
or problems with the drive gears
(missing teeth, etc.).
Wiper Shaft (Continued)
Runs the media path drive train and engages the head maintenance 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.
R# Definition
Typical
Value
(8400)
Typical
Value
(8500/
8550) Actions

Xerox Phaser 8400 Specifications

General

Brand	Xerox
Model	Phaser 8400
Category	Printer
Language	English