Xiamen Hanin Electronic Technology HM-A400, Руководство пользователя

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Operating Environment for the Printer
Before actually unpacking the printer, remember the following points when doing this.

Do not use the printer in an environment in which it will be subject to strong shaking while
it is printing.

Be careful to ensure that the printer is not exposed to direct sunlight.
The appropriate environment for using the printer is described below.
Temperature: -10°C to 52°C
Humidity: 10% RH to 85% RH (no condensation)

Do not place the printer near a copying machine or other device that produces a strong
electromagnetic field.

Keep the printer sufficiently removed from heaters and other sources of heat.

Use the printer in a clean, low-humidity environment that is free from dust.

Avoid using the printer in high-humidity rooms.

Printer Maintenance
Please perform the following maintenance every 6 months.

Thermal head
Dip a cotton swab in an alcohol solvent (ethanol, methanol, or isopropyl alcohol), and
clean the heating area of the head.

Platen
While turning the platen, use a soft dry cloth to lightly rub the entire surface of the platen
and remove any foreign objects.

Paper storage unit and the surrounding area
Remove any dirt, dust, pieces of paper, etc., from the paper storage unit.