Lexmark C520 Service Manual - Page 89

5022-xxx CACHE Test The CACHE Test is used to verify the processor CACHE is functioning properly. 1. Select CACHE Test from HARDWARE TESTS in DIAGNOSTICS. The machine initiates a POR of the printer, and the following screen is displayed: Resetting the Printer Upon completion of the POR, the following screen is displayed: CACHE Test x100 P:###### F:###### P:###### represents the number of times the CACHE test has passed, finished successfully. Initially, 000000 is displayed. The maximum pass count is 999,999. F:###### represents the number of times the CACHE test has failed, finished with errors. Initially, 000000 is displayed. The maximum fall count is 999,999. 2. To exit the test, turn the printer off. Duplex Tests Quick Test (duplex) This test prints a duplex version of the Quick Test that can be used to verify the correct placement of the top margin on the back side of a duplex page. You can run one duplexed page (Single), or continue printing duplexed pages (Continuous) until Stop ( ) is pressed. For information about changing the margin, see "Top Margin (duplex)" on page 3-14. Note: Before you set the duplex top margin, be sure to set the registration. See "Registration" on page 3-4. 3-12 Service Manual