Operator`s manual

94 A-Class
5.4.1 Cleaning the Printhead
CAUTION
NEVER use a sharp object on the Printhead; damage can result.
If print quality declines (symptoms can include unreadable bar codes, or streaks through the text and
graphics), the typical cause is debris build-up on the printhead. Furthermore, if not removed, this build-up
may lead to premature dot failure. Clean the printhead every time a roll of ribbon has been used. If using
direct thermal stock, clean the printhead every time a roll of labels has been used, or as needed. To help
you remember this important maintenance procedure, the printer can be programmed to prompt you for
cleaning; see Section 4.2.2.
Faulty Label:
Instead of consistent patterns, streaks in the direction
of print indicate a dirty or faulty printhead. (To print
one of the resident test labels, see Section 4.4.)
According to the media, ribbon, and printing parameters used, different methods are recommended for
cleaning the printhead. In all cases, perform the following preliminary operations before cleaning the
printhead:
Preliminary Cleaning Steps:
1. Stop printing. Raise the Access Cover, and then raise the Head Lift Lever. Wait a minute for the
printhead to cool.
2. Remove media and ribbon from the printer.
Proceed according to your cleaning requirements.