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Phaser 8400/8500/8550/8560 Color Printer Service Manual 4-47
General Troubleshooting
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.
This test determines if the purge pump system (pump/hose/purge valve/
printhead) is operating normally.
Temperature Status
R# Definition
Typical
Value
(8400)
Typical
Value (8500/
8550/8560)
Actions
0 Reservoir Temp
~127.7
o
~135.0
o
Reports the current
temperature
1 Left Jetstack
~134
o
~138
o
Reports the current
temperature
2 Right Jetstack
~134
o
~138
o
Reports the current
temperature
3 Preheater Temp
~62
o
~70 Reports the current
temperature
4 Drum Temp
~60
o
~60
o
Reports the current
temperature
5 Ink Melt 1 Temp
~50
o
~50
o
Yellow (usually off)
6 Ink Melt 2 Temp
~50
o
~50
o
Cyan (usually off)
7 Ink Melt 3 Temp
~50
o
~50
o
Magenta (usually off)
8 Ink Melt 4 Temp
~50
o
~50
o
Black (usually off)
Purge Pump
R# Definition
Typical
Value
(8400)
Typical
Value (8500/
8550/8560)
Actions
0 Jetstack
Temperature (deg)
~134
o
~138
o
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.
1 Start Power (watts) 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.).