
69
Appendix
Trouble
Detail
Page
Cannot connect
to Wi-Fi
®
Is Wi-Fi
®
signal strong enough?
P. 60
Is Wi-Fi
®
setting completed?
-
Is the product or the battery at a
high temperature?
The product may stop functioning
if at a high/low temperature.
-
Is "Airplane mode" still set?
P. 62
Display /
F
(Power button)
turns on but
ringtone does not
sound
Is the "Ringtone/Notification
volume" set to the minimum?
-
Is "Silent mode" set?
P. 61
Cannot operate
button/touch
panel
Is the power turned on?
P. 52
Is the security setting for the start
screen set?
-
Turn off the power and then turn it
on again.
P. 52
Cannot operate
the touch panel
as intended
Check for the correct operation of
the touch panel.
-
Turn off the power and then turn it
on again.
P. 52
A message
indicating that
charging is
necessary is
displayed
The battery is almost empty.
P. 46
The product
answers calls
when it shouldn't
Is "Auto answering" set?
-
Trouble
Detail
Page
The battery can
only be used a
short time
Is the battery adequately charged?
• Charge until the red charging
indicator turns green.
P. 46
Does the internal battery have
adequate service life remaining?
P. 23
Is the product often used in a
place where " " (out of service
area) appears?
P. 60
When making a
call, there is a
busy signal and
the call does not
connect
Is the product within the service
area or where signal is good
enough?
P. 60
The wireless line is extremely busy
or the party is calling. Retry later.
-
Display goes off
shortly
Is the time period before entering
"Screen timeout" set to short?
-
Display is dark
Is the "Brightness level" set to dark?
-
Is the temperature of the product
or battery high? The display may
become dark depending on the
temperature of the product.
-
Cannot hear/hard
to hear the other
party's voice
Is the call volume set to the
minimum?
P. 65
Hold the receiver to your ear.
P. 39
Cannot use
microphone
of earphone
microphone
Is the connector inserted
correctly?
Insert all the way in earphone
microphone terminal.
P. 75
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