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Chapter 9
Appendix
Troubleshooting
Phenomena Response
Does not start. The battery pack may be dead. If the battery pack is dead, the device will not start and the
LED will not light up. Restart it again after recharging the battery using the AC adapter.
Cannot operate the keys and the displayed
information does not update.
Remove the battery pack and then reconnect it.
Reference: P1-7 Battery pack installation method
It is hard to see the display Adjust the contrast.
Vertical lines appear on the display. If the device has not been used in a while and the battery pack has been removed
incorrectly, vertical lines may appear on the display. Remove the battery pack and then
reconnect it.
Communication is bad or the phone suddenly
disconnects.
It is possible that you are too far from the access point, the signal is being weakened by an
obstruction such as a wall, or there is electromagnetic interference. Confirm the reception
level.
The standby time is different to that in the
specifications.
The battery pack standby time may differ according to the configuration or settings of the
access point.
The device heats up. When the device is located outside the range of the access point, the device may consume
power. This device may become somewhat warm.
The device heats up when communicating or
recharging.
The device may become warm during calls or recharging. Continue to use as normal as
this is not unusual.
The volume is low. Adjust the volume.
After turning the power on, the time reverts to the
default value.
Although this device cannot retain the time when the power is turned off, there is a function
that automatically sets the time by matching the time information on the NTP server.
The battery pack becomes unable to be used. If the device will not be used for more than a month, remove the battery from the unit. The
battery pack may become unusable due to self-discharge. Store the battery pack at less
than 20°C in a low-humidity environment that is clean and free of dust.
The sound is interrupted when backing up or
restoring phonebook data from a WEB server
during communication.
Sound may be interrupted when backing up or restoring phonebook data from a WEB
server during communication. Continue to use as normal as this is not unusual.