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Service Mode
The Service Mode should be used only by authorized service
personnel. The following can be executed while in the Service
Mode:
• Print a Service Mode Self Test.
• Verify the Page Count, (the page count also is displayed on the
standard self test).
• Set the Page Count.
• Set the Cold Reset Default (This sets the factory default paper
size. Use when replacing non-U.S. Formatters).
• Set the Diagnostic Functions ON or OFF (for software
developers use only).
• Demo Page=On/Off. Removes the Demo Page option from the
self test menu.
• BIG Data=On/Off. Setting BIG Data to ON increases the size
of the printer’s status Readback Buffer.
Service Mode has messages only in English. However, certain
messages (i.e. “PCL CONFIG PAGE”) that are used in user-mode
and in service-mode, are displayed in the selected display
language while in Service Mode.
The following procedure is used to initiate the Service Mode.
1 Hold down the [Menu+] and [Value+] keys while powering ON
the printer. Hold the keys down until SERVICE MODE is
displayed.
2 The interrupted power-on self test is resumed. If the test
completes successfully, the message SERVICE MODE is displayed.
To exit Service Mode, press the Go key.
* Indicates factory default.
LaserJet 5/5M/5N Printer B-25