HP color laserjet 4500 Manuale Utente
68
Chapter 2 Service tools
EN
Engine test
The printer has one test pattern (vertical lines). When an image defect
appears, a test print can be made to identify the problem. The test print
can be made by pressing the test print switch located on the right side
of the printer (see figure below). A test pattern can be printed by
pressing the test print switch 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 paper is loaded in any tray other than Tray 1.
appears, a test print can be made to identify the problem. The test print
can be made by pressing the test print switch located on the right side
of the printer (see figure below). A test pattern can be printed by
pressing the test print switch 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 paper is loaded in any tray other than Tray 1.
The engine test does the following:
•
Verifies that the print engine is functioning correctly (the formatter
PCB is completely bypassed during an engine test).
PCB is completely bypassed during an engine test).
•
Isolates printer problems.
•
Checks and adjusts registration.
•
Prints from Tray 2 or 3 only, not from Tray 1.
•
Can be activated with the formatter PCB removed.
Note
For the printer to perform an engine test, Tray 2 or Tray 3 must be
installed and loaded with paper, and the toner cartridges must be
installed in the printer.
installed and loaded with paper, and the toner cartridges must be
installed in the printer.
Location of the engine test button
Engine test button