Lexmark T420, Service Manual

Page: 104 / 208

3-6
Service Manual
4048–00x
Printer Diagnostics Mode
The Printer Diagnostics mode is for service use only. Its
manipulation is the same as the Configuration mode. The following
functions can be performed in the Diagnostics mode. See
“Configuration Menu Group or Diagnostic Menu Group” on
page 3-2
for more information.
1. Print diagnostic instructions and menu settings by pressing and
holding Continue until the lights cycle.
We recommend this sheet be run and checked anytime
Diagnostics mode is entered. It provides instructions in the
manipulation of the menu.
2. Set edge–to–edge printing on/off.
– Off is the default and normal setting which allows the printer
graphics and printing engine to set the margins accordingly.
– When edge–to–edge is set on, the printer graphic and
printing engine shift all four margins to the physical edges of
the paper.
3. Print the Print Quality Pages.
– These are the same pages that are run in the Configuration
mode.
Note: The toner cartridge lockout function is disabled in this
mode.
– In the Configuration mode, the lockout function is enabled
which means the pages cannot be printed unless the toner
cartridge has a machine class ID that matches the machine
class ID held in NVRAM on the RIP card.
Note: The next two items run continuously until interrupted by
pressing Cancel or powering off. The printed page comes from
printer ROM and is useful for printhead alignment and skew
measurements.
4. Print simplex from tray 1, MPF, or tray 2 (if installed).
5. Print duplex from tray 1, MPF, or tray 2 (if installed).