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120 Chapter 2 – Service mode EN
LJ 4100 Service mode functions
Service mode should be used only by authorized service personnel.
The following can be done in Service mode:
• Verify and set the page count and serial number. These are shown
on the configuration page.
• Set the cold-reset paper size default. (This sets the factory default
paper size to either Letter or A4.)
• Turn the diagnostic functions on or off (for software developers
only).
• Clear the event log.
Set the interval at which the
PERFORM PRINTER MAINTENANCE
message appears on the control-panel display.
Entering Service mode
1 While turning on the printer, hold down SELECT and CANCEL JOB
until all of the lights on the control panel are lit.
2 Press the right side of M
ENU, and then press SELECT. The message
SERVICE MODE temporarily appears and will reappear when the
printer completes the initialization process.
3 To exit Service mode, press G
O.
Note
If READY appears in the control panel, the buttons might have been
released too soon, or the wrong buttons were pressed.
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.