6-2
Phaser 440 Color Printer
6
Troubleshooting
Print engine troubleshooting
This topic is a step-by-step procedure for systematically verifying aspects of the
printer's operation. Following this procedure should help determine the cause
of a printer's failure.
Verifying image processor operation by using the Test Pattern Generator
Instructions for using the Test Pattern Generator are provided in Appendix D
“Test Pattern Generator.”
1.
Attach the Test Pattern Generator to the printer's parallel port. The
Test Pattern Generator can be attached to the printer while the printer
is turned on.
2.
If the printer does not power up go to the later topic “Verifying power
supply operation” on page 6-4.
3.
Observe that the READY light is on (not blinking). If it does not light,
go to the later topic “Verifying power supply operation” on page 6-4.
4.
Select any test pattern using the Test Pattern Generator's four DIP
switches and then press its print button.
5.
After the print is made, remove the Test Pattern Generator.
If the printer prints a test pattern, then the printer's image processor board and
print engine are working correctly. The printer's problem resides with the host
computer-to-printer connection, or the host computer. Refer to the appropriate
topics in Chapter 3 “Verifying the Printer and Hosts Connections.” (Note that
since the Test Pattern Generator prints only through the parallel port, the
possibility also exists that the hardware of any of the other host interface ports
could be non-functioning, and could be the source of the printer failure. In this
case, the printer should be able to print from another port, except the
non-functioning port.)
If the printer does not print a test pattern, then a problem exists with the
printer's image processor board or the print engine. Proceed with the next topic
“Verifying print engine operation by using its self-test print” on page 6-3.
