CIAAT BRAVA21, Operation Manual

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Chapter 5. In order to more comfortably use
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Paper Pre-Cut function can be turned off through the printer driver.
For longer Printer usage
Caution: Dust on the surface of the paper may damage the thermal head.
Clean the dust on the paper surface and install the paper roll into the printer.
Caution: Clean the finger print on the paper surface to avoid the finger print
on the print image.
Caution: Paper may be installed and fixed on improper direction, but maybe
oblique direction.
Caution: Not straight cut of paper edge may cause paper jam. To prevent
paper jam, recommend to use pre-cut function of paper roll. In case of paper
jam or print incompletion, reinstall the paper roll and use pre-cut function.
Caution: Printing continuous pattern of high density image in limited part
may cause uneven density print. Recommend not to print those images
continuously.