Print Engine Troubleshooting; Testing The Print Engine - Tektronix Z740/N - Phaser 740 Color Laser Printer Service Manual

Print engine troubleshooting

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.

Testing the print engine

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 33.
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 33.
3. Verify that the image processor's health LED is flashing. The health LED is
viewable through the grill behind the manual feed tray (when the tray is
lowered).
4.
Press and hold the test button for 4 seconds (on the rear of the printer in the
center of the rear cabinet panel). The print engine responds by making a
parallel line test print.
If the printer prints a test print, 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 33.
If the printer does not make the test print, then a problem exists with the printer.
Proceed with the topic, "Verifying power supply operation" on page 33.
32 Phaser 740 Color Printer