HP — Diagnostics

Page count The page count that is stored in nonvolatile memory (NVRAM) and is shown on the configuration page printout represents the number of pages the printer has printed (excluding engine test prints). If it is necessary to install a new formatter in the printer, the page count must be reset so that it represents the age of the printer engine rather than the age of the formatter. Note Before replacing the formatter or firmware DIMM, print a configuration page and a menu map to verify the current printer settings. Use the information on these pages to reset the customer’s printer settings.

Maintenance count The maintenance count should be reset only after a maintenance kit has been installed. For more information, see page 86. Maintenance interval The MAINTENANCE INTERVAL in the service-mode menu sets the page count interval at which the next service is due for the printer. This is set initially at the factory to 200,000 pages. (For example, the PERFORM PRINTER MAINTENANCE message appears at 200,000 pages. If the printer maintenance kit is installed at 200,114 pages, the message reappears 200,000 pages later, at 400,114 pages.) The procedure for editing this number is similar to editing the PAGES item. Serial number The printer serial number is stored in NVRAM.

If a formatter is replaced, then the printer serial number must be reentered. The procedure for editing this number is similar to editing the PAGES item. Note Before replacing the formatter or firmware DIMM, print a configuration page and a menu map to verify the current printer settings. Use the information on these pages to reset the customer’s printer settings. Cold reset paper The cold reset paper size is stored in NVRAM. When a printer cold reset is performed, the default paper size (in the printing menu) is set to the value saved for the cold reset paper size. Possible values are COLD RESET PAPER=LETTER and COLD RESET PAPER=A4 .

When replacing the formatter in countries that use A4 rather than letter-size paper, set the cold reset paper size to A4 . Diagnostics This menu item enables or disables the use of the firmware diagnostic features for software development. Possible values are DIAGNOSTICS=OFF* and DIAGNOSTICS=ON . When enabled, the diagnostic features are available when the printer is in the online READY state by pressing the S ELECT key. Note The feature above is for software developers only. EN Chapter 3 Printer operation 77