Panasonic GTWIN Reference Manual page 246

GTWIN Reference Manual
Problem
displayed (error codes
and erroneous date
and time items noted
above do not apply).
Switch does not work
(grid and validity
settings noted above
are correct).
No sound is output
Possible cause
The speaker is not connected.
The setting for using sound is not on.
6.6 What to do if Something Unusual Occurs
Possible solution
system menu and initialize the memory
(F-ROM), then transfer data again from
GTWIN to the GT main unit.
Note: When doing this, all base screen
data, GT setting data, keyboard screen
data, and bitmap data will be lost. Before
doing this, back up all data.
3) If 2) produces no change, set the
operating mode setting switches 2, 3 and 4
on the rear of the GT unit to ON and reset
the power supply.
Note: When doing this, the factory default
settings will be reset and the GT unit's
memory will be cleared. Before doing this,
back up all data.
Connect an audio output equipment
(speaker with a built-in 3.5-mini plug
amplifier).
Set the sound setting of the GT
configuration settings to ON.
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