Panasonic VL-MV75 Operating Instructions Manual page 28

11. Troubleshooting
Ringtone
Problem
The ringtone for the
doorphone does not
sound.
Calls
Problem
Sound cuts in/out or
fades.
Calls cannot be heard
because of noise or
feedback.
Your voice cannot be
heard by the visitor but
the visitor's voice can be
heard.
Others
Problem
R "Demo mode" is
displayed on the
screen.
R The ringtone regularly
sounds.
R You cannot talk or
make calls.
The product does not
work with correct
operations.
The product does not
work properly.
The main monitor does
not work properly.
R Nothing is displayed
on the monitor.
R The ringtone does not
sound.
R Voices cannot be
heard.
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R The ringtone volume is muted.
→ Activate the sound for the ringtone.
R The area surrounding the main monitor, extension monitor, or
doorphone are noisy, causing the sound to cut out or fade.
→ Try using the "Press-to-talk" mode.
R Noise or feedback may occur when you are too close to the other party.
→ Move away from the other party.
R You are using the "Press-to-talk" mode. (
monitor/extension monitor.)
→ When using the "Press-to-talk" mode, the visitor can hear your
voice only while you are pressing M
R The "Demo mode" feature is enabled.
→ Set "Demo mode" to "Off".
Perform the following operations.
→ Press the MRESETN button on the side of the main monitor with a
pointed object. (Recorded images and configured settings are not
affected.)
R Check the power connection.
R If the power is connected, there may be a problem with the electrical
wiring.
→ Contact an authorised service centre.
Cause & Solution
Cause & Solution
is displayed on the main
N.
Cause & Solution
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