HP (Hewlett-Packard) LJ 4000T Printer User Manual


 
126 Chapter 2 Service mode EN
Testing the printer
When you print a configuration page, the printer checks its internal
controller and I/O interface and then prints a test page. You can review
the configuration page printout to verify proper installation of such
options as paper trays or printer languages. For more information, see
the service manual.
Engine test
The printer has a built-in test pattern (pairs of vertical lines). The test
print can be made by pressing the test-print switch located on the left
side of the printer once after the photosensitive drum has stopped and
the printer has entered the Standby mode. If the switch is held down,
the test pattern is printed continuously. The switch can be used when
media is loaded in any tray other than tray 1.
Note
For the printer to perform an engine test, tray 2, 3, or 4 must be
installed and loaded with media, and the toner cartridge must be
installed in the printer.