Tektronix Phaser 780 Color, Service Quick Reference Manual

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26 Phaser 780 Color Printer
Image
Contains Too
Much
Coverage Image density exceeded design
specifications.
The engine control board detected that
the first 70mm of the lead edge of the
four color image about to be printed
exceeds the design specification for total
image density. The specification is 280%
or less image density. For example, a
density setting of 100% for each of the
four colors creates a layered four color
image with a combined density of 400%.
1.
Power cycle the printer
2.
Print a less complex, color
image to determine if it is
overly dense.
3.
Replace the engine control
board
Replace
Fuser Roll
Cartridge The fuser oil roll has reached end of life.
The engine control board detected that
the fuser oil roll has processed the
equivalent of 20,000 sheets of paper
since it was installed.
1.
Replace the fuser roll
cartridge
2.
Power cycle the printer
3.
Ensure the fuser connectors
are properly seated
4.
Test the fuser using internal
diagnostics
5.
Replace the engine control
board
Waste
Cartridge
Full The waste cartridge is full. The engine
control board detected that the waste
cartridge sensor was on for 1250 print
cycles.
1.
Replace the waste cartridge
2.
Test the waste cartridge full
sensor using internal
diagnostics
3.
Inspect the electrical
contacts and wiring Replace
the waste cartridge full
sensor
4.
Replace the engine control
board
Replace
Black Toner
Cartridge Black image density is too low. The
engine control board detected that the
auto-density calibration sensor reads
the black patch density as being below
specification and that the reading is
either slow to raise or does not raise
after the printer attempts to increase
density.
1.
Replace the black toner
cartridge
2.
Test the toner/developer
dispense motor
3.
Test the auto-density
calibration sensor
4.
Replace the engine control
board
Error code
and
message Description Corrective action