Filter
Top Products
Phaser 8400/8500/8550/8560 Color Printer Service Manual 4-31
General Troubleshooting
Check Drive Menu
This test moves the wiper drive mechanism through the complete range of its
motion in each direction and does an “on the fly” reversal to verify operability.
Wiper Drive
R# Definition
Typical
Value
(8400)
Typical
Value (8500/
8550/8560)
Actions
0 Up Motion Drive
Error (uin)
120 to 275 -.06 to -.4 Reports the average following
error while moving the wiper
up from the low limit to the
lock encounter point.
1 Up Motion Drive
Error Ripple (uin)
35 to 150 .06 to .2 Reports the difference between
the max and min following
error over the same interval.
2 Up Distance (uin) 3200 to
4600
4000 to
4350
Reports the difference between
the max and min limits of
travel when moving up.
3 Lock Encounter
Distance (uin)
1300 to
2500
3500 to
4450
Reports the distance up from
the lower limit of travel at
which the head lock latch is
encountered.
4 Lock Engage
Distance (uin)
350 to 700 2500 to
4500
Reports the distance up from
the lower limit of travel at
which the head lock latch
engages.
5 Lock Engage Peak
(uin)
-250 to
-125
.25 to 1.0 Reports the peak following
error at the point the latch
engages.
6 Down Motion
Drive Error (uin)
-250 to
-125
.25 to 1.0 Reports the average following
error while move the wiper up
from the low limit to the lock
encounter point.
7 Down Motion
Drive Error Ripple
(uin)
40 to 150 .05 to .8 Reports the difference between
the max and min following
error over the same interval.
8 Down Distance
(uin)
3200 to
4600
4000 to
4350
Reports the difference between
the max and min limits of
travel when moving up.
9 Lock Disengage
Distance (uin)
-2000 to
-50
-95 to -60 Reports the distance up from
the upper stall point at which
the head lock latch releases.
10 Lock Disengage
Peak (uin)
-800 to
-150
.30 to 1.2 Reports the peak following
error at the point the latch
releases