SATO LM400E - Manual (Page 12)

Avoid dust
Dust buildup may result in poor print quality.
This may cause not only malfunction but
also shorten the life span of the printer.
Keep out of direct sunlight
This printer has a built-in optical sensor.
Exposure to direct sunlight will make the
sensor less responsive and may cause
the label to be sensed incorrectly.
Close the cover when printing.
Do not place the printer near crane or pressing machine.
Machineries such as crane and pressing
machine require large amount of power.
This may cause electrical noise or voltage
reduction.
Avoid such locations to reduce the risk of
malfunction or damage to the printer.
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