Xerox PHASER 8500 Service Manual page 177

Phaser 8400/8500/8550/8560 Color Printer Service Manual
This test scans the thermocouples and reports data on the current
temperature with the goal of providing a picture of the current temperature
state of the printer. All degrees are reported in Celsius.
Temperature Status
R# Definition
0 Reservoir Temp
1 Left Jetstack
2 Right Jetstack
3 Preheater Temp
4 Drum Temp
5 Ink Melt 1 Temp
6 Ink Melt 2 Temp
7 Ink Melt 3 Temp
8 Ink Melt 4 Temp
This test determines if the purge pump system (pump/hose/purge valve/
printhead) is operating normally.
Purge Pump
Typical
Value
R# Definition (8400)
0 Jetstack
~134
Temperature (deg)
1 Start Power (watts)
Typical Typical
Value Value (8500/
(8400) 8550/8560)
o o
~127.7 ~135.0
o o
~134 ~138
o o
~134 ~138
~70
o
~62
o o
~60 ~60
o o
~50 ~50
o o
~50 ~50
o o
~50 ~50
o o
~50 ~50
Typical
Value (8500/
8550/8560)
o o
~138
General Troubleshooting
Actions
Reports the current
temperature
Reports the current
temperature
Reports the current
temperature
Reports the current
temperature
Reports the current
temperature
Yellow (usually off)
Cyan (usually off)
Magenta (usually off)
Black (usually off)
Actions
Reports current jetstack
temperature. If the
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.
Reports initial peak pumping
power after pump power on.
This reflects the inrush current
to the pump motor. An unusual
value could indicate a defective
motor (windings/brushes/etc.).
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