CITIZEN CT-S851 - Manual (Page 27)

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This printer can only be positioned horizontally. It cannot be positioned
vertically or on a wall.
3.5 Precautions for Installing the Printer
CAUTION
Do not use the printer under the following conditions.
„ Locations subject to vibration or instability.
„ Locations that are very dirty or dusty.
„ Locations where the printer is not level.
• The printer may fall and cause an injury.
• The quality of printing may deteriorate.
„ Oriented other than as specified.
• The printer may malfunction, be damaged, or cause an electric shock.
Horizontal position Vertical position