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4 Microline 420/421 User’s Guide
• Unplug the printer before you clean it. Use only a damp
cloth. Do not use liquid or aerosol cleaners.
• To protect your printer from overheating, make sure no
openings on the printer are blocked. Do not put the printer on
or near a heat source, such as a radiator or heat register. If
you put the printer in any kind of enclosure, make sure it is
well ventilated.
• The printhead can get quite hot when it has been printing for
a length of time. Do not touch the printhead until it has had a
chance to cool off.
• Do not use your printer near water. Do not spill liquid of any
kind into it.
• Do not poke anything into the ventilation slots on the sides of
the printer. You could get a shock or cause a fire.
• Aside from the routine maintenance described in this
document, don’t try to service the printer yourself. Opening
the cover may expose you to shocks or other hazards. Don’t
make any adjustments other than those outlined in the
document. You might cause damage requiring extensive
repair work.
• If anything happens that indicates that your printer is not
working properly or has been damaged, unplug it
immediately. Then, follow the procedures in “Service and
Support” for having your printer serviced.
These are some of the things to look for:
– The power cord or plug is frayed or damaged.
– Liquid has been spilled into the housing, or the printer has
been exposed to water.
– The printer has been dropped or its cabinet has been
damaged.
– The printer doesn’t function normally when you’re
following the operating instructions.