Xerox C2424 - WorkCentre Color Solid Ink Service Manual page 209

Purge Pump
This test determines if the purge pump system (pump/hose/purge valve/printhead) is operating
normally.
R# Definition
0 Jetstack
Temperature (deg)
1 Start Power (watts)
2 Initial Pumping
Power (watts)
3 Max Pressure
Pumping Power
4 Pumping Time To
Max (sec)
5 No Pressure
Pumping Power
(watts)
6 Pressure Decay
Time (sec)
General Troubleshooting
Typical
Value Actions
MFG Reports current jetstack temperature. If the
Only temperature is above current threshold (120
deg), the test will abort and following results
will report as 0. This avoids having ink extrude
out of the faceplate and onto the drum,
requiring both a wipe and a chase to clean up.
MFG Reports initial peak pumping power after pump
Only power on. This reflects the in rush current to
the pump motor. An unusual value could
indicate a defective motor (windings/brushes/
etc.).
MFG Reports minimum pumping power after start up
Only peak (R1). This is the first value to reflect the
system pressure. If the volume is normal
(hose/printhead), then the drop is large and the
pressure rises slowly. If the volume is small
(hose pinched plugged near the pump), then
the drop is minimal and the pressure rises
quickly.
MFG Reports average pumping power just before
Only maximum pressure is reached. May indicate
the efficiency of the pump, leaks, and/or the
setting of the pressure relief valve.
MFG Reports the time from pump on until the
Only pressure relief valve opens. May indicate the
conditions discussed in R3, as well as the
system volume.
MFG Reports the average pumping power after the
Only pressure has fully decayed. May indicate pump
motor condition/efficiency.
MFG Reports the time between purge valve opening
Only and the point when the pumping power
(relative to the current pressure), fades back
into the ripple of the no pressure pumping
power (see the R5 discussion above). This
time could indicate the operation of the purge
valve and the condition of the bleed orifice
(plugged, etc.).
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