When the
BACKUP BATTERY LOW!
In this situation you should upload your data from the PT- 500 to a PC and have the Lithium battery replaced. Contact your local sales or service representative for replacement of the Lithium battery.
Note: Data may not be backed up and data loss may occur if both the main battery and the Lithium battery are discharged.
2.3 Using the Keypad
The Keypad of the
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