Mitsubishi t255 User Manual
74
Troubleshooting
Warning Tones
Problem
Possible cause and solution
Phone does not
turn on
turn on
• If the phone is new, see “Charging the Battery” on
page 8. Otherwise, recharge or replace the battery.
If this does not solve the problem, contact
your service provider.
If this does not solve the problem, contact
your service provider.
Phone turns on but
there is no display
there is no display
• Display contrast is turned down too low. Reset
contrast (see page 47).
The phone does not
work with the
handsfree adapter
work with the
handsfree adapter
• A battery is required to use the handsfree adapter;
verify a charged battery is installed on the back of
the phone. Verify the phone is attached to the
adapter.
the phone. Verify the phone is attached to the
adapter.
Dropped calls
• The signal strength will depend on your location.
Check the received signal strength indicator
,
make sure your antenna is fully extended, and try
again after the signal strength increases (another
bar appears). In addition to geographic location,
the signal will weaken behind walls, under bridges,
in tunnels, or due to other obstructions.
again after the signal strength increases (another
bar appears). In addition to geographic location,
the signal will weaken behind walls, under bridges,
in tunnels, or due to other obstructions.
Volume varies/mutes
briefly
briefly
• The system’s signal strength will vary depending on
your location. Audio level variations can occur due
to a weak signal or high speed travel.
to a weak signal or high speed travel.
Tone
Description
Error tone
• Sounds when an unexpected key is pressed (e.g.,
pressing Send after pressing Menu).
Fast busy tone
• Indicates that the system has not accepted your
call.
Siren tone
• Indicates an invalid phone number.
Triple high-pitched
tone
tone
• A short triple high-pitched tone generated every
20 seconds indicates the battery needs to be
charged.
charged.