Canton Digital Movie 5 Bedienungsanleitung Seite 56

English
Problem
DM system hums.
The DM system swit-
ches to the BT input
inadvertently.
The BT input cannot
be selected using the
"Input" keys.
56
Possible cause
1. Signal cable from source device to DM system
too long (AUX).
2. Signal cable is not shielded or shielding has
been damaged (defective).
3. Ground loop (ripple pickup) generated.
4. Another piece of equipment on the same
circuit has no interference suppression
(e. g. fridge).
This can happen when your mobile device produces
system tones e.g. typing on the keyboard.
The SEL function is activated (AUT).
Solution
1. Use shorter signal cable.
2. Exchange the signal cable by a shielded one.
3. A ground loop can be generated when two or more
devices connected via a signal line (cinch) are plugged into
separate sockets (e. g. amplifier and computer). Plug all
safety class I devices (with a safety plug) connected to the
DM system into one multiple outlet stripe.
4. Switch off possible sources of interference to test; unplug
the device concerned to see if the humming noise disap-
pears or connect the source of interference to a different
circuit (L1, L2 or L3). (Where necessary take advice from
your electrician) Insert a special "sheath current filter"
(available from specialist retailers) between the amplifier
and the DM system to eliminate the humming. Turn the
power plug round to reduce the so-called hum voltage
(particularly important if the source device is not earthed).
1. Deactivate the SEL function (MAN).
2. Deactivate the system tones on your mobile end device.
In this case the switching process happens automatically as
soon as the DM system detects an audio signal from the mobile
end device.