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4-32 Phaser 8400/8500/8550/8560 Color Printer Service Manual
General Troubleshooting
This test moves the gear train in one direction while capturing data, does a
reversal to capture reversal transient data, then operates in the other
direction.
11 Bottom Encounter
Distance (uin)
-2500 to
-1800
-4250 to -
3900
Reports the distance up from
the upper limit of travel at
which the wiper first
encounters the lower travel
limit.
12 Turnaround
Recovery time
(sec)
0.001 to
0.250
-0.05 to .35 Reports the time following the
start of the turnaround motion
that the motion drive error
return to normal in the
opposite direction.
Paper Path Drive
R# Definition
Typical
Value
(8400)
Typical
Value (8500/
8550/8560)
Actions
0 Forward Drive
Power Level
(watts)
1.0 to 4.0 Reports the average drive
power level in the foreword
direction.
1 Up Motion Drive
Error Ripple (watts)
0 to 1.5 Reports the average drive
ripple level in the forward
direction.
2 Reverse Drive
Power Level
(watts)
-4.0 to
-1.0
Reports the average power in
the reverse direction.
3 Down Motion Drive
Error Ripple (watts)
0 to 1.5 Reports the average drive
ripple in the forward direction.
4 Swing Arm
Transition Time
(sec)
.03 to .06 Reports the time that the lower
portion of the paper path drive
is disconnected while the
swing arm transitions to the
other drive position.
Wiper Drive (Continued)
R# Definition
Typical
Value
(8400)
Typical
Value (8500/
8550/8560) Actions