System Maintenance
6-11-8 Checking Interfaces
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 242).
The NT31/NT31C allows the following communication functions to be checked.
• Communication with the Support Tool
• Communication at serial ports
• Communication with printers
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