HP LaserJet Enterprise Flow MFP M575

The product contains extensive internal engine diagnostics that help in troubleshooting print quality, paper path, noise, assembly, and timing issues.

Defeating interlocks

Different tests can be used to isolate different types of issues. For assembly or noise isolation, you can run the diagnostic test when the front and right doors are open. To operate the product with the doors open, the door switch levers must be depressed to simulate a closed-door position.

WARNING! Be careful when performing product diagnostics to avoid risk of injury. Only trained service personnel should open and run the diagnostics with the covers removed. Never touch any of the power supplies when the product is turned on.

1. Open the right and front doors.
2. Locate the slots on the right and front of the product.
3. Insert a folded piece of paper into each slot at the same time until the product is in a Ready state.

Disable cartridge check

Use this diagnostic test to print internal pages or send an external job to the product when one or more toner cartridges are removed or exchanged. Supply errors are ignored while the product is in this mode. When the product is in this mode, you can navigate the troubleshooting menus and print internal pages (the print quality pages will be the most useful). This test can be used isolate problems, such as noise, and to isolate print-quality problems that are related to individual toner cartridges.

NOTE: Cartridges are not keyed and can be interchanged. An error will display on the control panel if a toner cartridge is installed in the wrong position. The Manage Supplies menu explains which toner cartridge is misplaced.

NOTE: Do not remove or exchange toner cartridges until after you start the disable cartridge check diagnostic.

1. From the Home screen on the product control panel, scroll to and touch the Administration button.
2. Open the following menus:
   • Troubleshooting
   • Diagnostic Tests
   • Disable Cartridge Check

Engine test button

To verify that the product engine is functioning, print an engine test page. Use a small pointed object to depress the test-page switch located on the rear of the product. The test page should have a series of horizontal lines. The test page can use only Tray 2 as the paper source, so make sure that paper is loaded in Tray 2.