HP Designjet 4000 Service Manual - Page 80

Service Tests and Utilities 4 Once inside the Service Tests Menu use the Arrow keys to scroll through the "Service Tests" selections. Press the Enter key to begin a specific test when the required Service Test is highlighted. Press Enter to confirm selection Use UP and DOWN keys to select The Service Tests work in a special Mode which does NOT require the full Initialization of the Printer. Therefore it is important that once you have finished with the Service Tests, you MUST power OFF the Printer and Power ON again before trying to print. In some cases a quick press of a button may not be recognized by the Printer. When pressing a button, be sure to press it deliberately and all the way to the bottom of its travel. If the Printer hangs up during a test, switch the Printer OFF and restart from step 1. 4-6 hp designjet 4000 series printer service manual