Print Engine Troubleshooting; Testing The Print Engine - Tektronix Phaser 550 Service Manual

6
Troubleshooting

Print engine troubleshooting

Testing the print engine

6-2 Phaser 550 Color Printer
After the fuser reaches its idle temperature the printer is placed on line
in its READY state.
The print engine is initialized. If the startup page feature has not been disabled
and no error occurred with the printer, the printer prints a startup page.
This topic is a step-by-step procedure for systematically verifying particular
aspects of the printer's operation. Following this procedure should lead to the
cause of a printer's failure.
1. If the printer does not power up, or does not initialize, or the printer
initializes but the motors do not run properly, go to the later topic,
"Verifying power supply operation" on page 6-3.
Note
If the image processor does not power up or is disconnected from its
power source, then the print engine will not power up.
2. Observe that the Ready message is displayed on the front panel. If it
is not, go to the later topic "Verifying power supply operation" on
page 6-3.
3.
Verify that the image processor's health LED is flashing. If it is not, go
to the topic, "Printer self-diagnostics" on page 9-6. The health LED is
viewable through the grill behind the manual feed tray (when the tray
is lowered).
4. Press the test button on the rear of the printer (in the center of the rear
cabinet panel). The print engine responds by making a gray fill test
print.
If the printer prints a gray fill, then the printer's print engine is working
correctly. Proceed with the next topic, "Verifying printer operation by using its
self-test print" on page 6-3.
If the printer does not make the gray fill print, then a problem exists with the
printer. If the printer does not print a test pattern, then a problem exists with the
print engine. Proceed with the topic, "Verifying power supply operation" on
page 6-3.