Citizen Systems Compact desk-top dot matrix printer CBM-910 Type II - Manual (Page 26)

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4.8 General Remarks
(1) Do not print without ink ribbon properly provided. It may cause damage on the
print head.
(2) Replace the ink ribbon with a new one before it becomes worn-out. Do not
replenish ink.
(3) Be careful not to drop foreign substances, such as a clip and a pin into the
equipment. Otherwise, equipment failure may result.
(4) To operate the printer, be sure that the printer is placed on a flat stable place. If
the table is not flat or stable, the printer may be displaced by vibrations during
printing, resulting in a possible danger. Fixing it stationary is also important to
avoid erroneous operation.
(5) To clean the surface of the printer, never use organic solvent (alcohol, thinner,
benzine, or the like).
(6) Paper, if left for a long time with a ribbon cassette mounted, may cause the print
paper to be stained. Also, continuous printing, if conducted at a low temperature,
may cause thin printing due to the ink characteristics.
(7) Do not deliver the printer with a ribbon cassette loaded.