If You Have A Question - Fujitsu CD5425 Owner's Manual

If you have a question:

First check the items mentioned below before attempting to troubleshoot
problems.
If a problem occurs, for instance when the unit does not respond to
any button presses, or the display doesn't work correctly, press the
[RESET] button using a paper clip or similar item.
Pressing the [RESET] button will delete all the entries from memory.
The settings will return to those made at the factory prior to shipment.
[RESET] button
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If you have a question: