Service manual

5-1

Diagnostics and Tests

This chapter describes the several diagnostics and testing procedures available

on the LJ 110/120 printer. These procedures are designed to help the user to

check the machine correct functioning.

Power On Diagnostics

The machine firmware has been designed so that a check is made on the

printer's major function each time the printer is powered on.

If errors are detected during this autodiagnostic phase, the On-Line indicator

on the printer console will begin to flash rapidly.

Monochrome Print Test

This test checks whether the print head operates correctly, displays the printer's

operating parameters and reviews the character fonts available in the printer.

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