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PR-01737 Ribbon Low
The print ribbon is low.
This message does not indicate a problem; it means that at least 90 percent of the print ribbon has been used. This message is for your information so that you can plan to replace the print ribbon.
When you press the Ready key on the LCD panel, or the OK button on the message box, the message is not displayed again even if the condition continues, until you power off and power on the printer.