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6-11SectionSystem Maintenance
215
Note When The voltage is lowered is displayed, replace the built-in battery immedi-
ately. For details on the replacement method, refer to 7-3-1 Replacing the Bat-
tery (page 244).
6-11-8 Checking Interfaces
The NT31/NT31C allows the following communication functions to be checked.
• Communication with the Support Tool Page 215
• Communication at serial ports Page 217
• Communication with printers Page 220