Check Fans Menu - Xerox Phaser 8400 Service Manual

Check Fans Menu

Drum Fan, Electronics Fan, and MP Motor Fan
Test is the same for each fan. The fan is turned on fro a short time while the power is measured.
Test determines if the fan is operating and turning at the expected speed.
R# Definition
0 Max Power
(watts)
1 Constant
Velocity
Power
(watts)
2 Constant
Velocity
Power Ripple
(watts)
3 Constant
Velocity
Time (sec)
4-22
Drum Elect.
Value Value
5 to 11 7 to 13
-0.01 to 3 to 8.0
0.30
0.06 to 0.60 to
0.35 0.40
0.25 to 1.5 to 5.0
6.0
MP
Value Actions
1.5 to 3.5 Reports initial power drawn
by the fan at On.
May indicate the condition of
the windings.
1.0 to 3.0 Reports the power drawn by
the fan while running a
constant velocity.
Should be proportional to the
final fan RPM due to the back
EMF.
0.01 to Reports the power ripple
0.1 while the fan is running at
constant velocity.
Could indicate a bad winding/
commutator segment.
-0.01 to 7 Reports the time from On
until the fan reaches constant
velocity.
Could indicate a weak fan/fan
drive or extra drag (bearings,
brushes, blade).
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