Fukuda Denshi DSL-8001, Service Manual

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Operation
The <Night Mode Active> message is displayed.
Cause : The night mode is set.
Solution : Cancel the night mode.
The <Alarm Sound Suspend (xx)> message is displayed.
Cause : Alarm sound is suspended.
Solution : Press the [Alarm Silence] key for more than 3 seconds.
System
The <Battery Communication Error> message is displayed.
Cause : Communication error with the battery control circuit has occurred.
Solution : Reboot the equipment. If the same message is repeatedly displayed, a failure of the
equipment can be considered. Cease the measurement and contact our service
representative.
The <System Error (RTC)> message is displayed.
Cause : An error has occurred on the clock control circuit.
Solution : Reboot the equipment. If the same message is repeatedly displayed, a failure of the
equipment can be considered. Cease the measurement and contact our service
representative.
Others
The display cannot be clearly seen because it is too dark or bright.
Cause 1 : The display brightness is not adjusted.
Solution : Adjust to the appropriate brightness.
Cause 2 : The monitor is set to night mode.
Solution : Cancel the night mode.