Canton Smart Amp 5.1 Operating Instructions Manual page 122

English
Problem
The speaker connec-
ted to the Amp 5.1
is buzzing.
The Amp 5.1
unintentionally
switches to the input
[BT].
The Amp 5.1
unintentionally
switches on.
122
Possible cause
1. The signal cable from the source device to
the analoque input [AUX] of the Amp 5.1 is too
long.
2. Used signal cable not shielded or the shield on
the cable used is interrupted (defective).
3. Ground loop (hum loop) "generated".
A ground loop can occur if at least two
interconnected devices with safety plugs
(e.g. amplifier and computer) are connected to
locally separated power outlets.
4. You are operating a non-interference suppres-
sed consumer (e.g. fridge) at the mains.
1. The function BT Select [BTS] is activated and
your (mobile) device plays system sounds, such
as typing on the keyboard.
1. This can happen when your (mobile) device is
playing system sounds such as when typing on the
keyboard, a digital source is turned on, or an
analogue source is playing.
Solution
1. Use a shorter and/or higher quality (better shielded) signal
cable.
2. Replace the cable with a shielded and/or higher quality
cable.
3. Connect all devices connected to the Amp 5.1
with a safety plug to a single power strip (multiple socket).
4.1 For testing purposes, turn off any possible sources of
interference; have the relevant device suppressed for interfe-
rence if the humming sound disappears, or initially connect
the source of interference to another mains phase (L1, L2 or
L3) (consult a specialist, if necessary).
4.2 Insert a special "sheath current filter" (available from
specialist retailers) between the sound source and the Amp
5.1 to eliminate the humming.
4.3 Turn the power plug round to reduce the so-called hum
voltage (particularly important if the source device is not
earthed).
1. Deactivate the function BT Select [BTS] and set it back on
Manual [MAN].
2. Disable all system sounds on your (mobile) device.
1. Change the standby function from Auto [AUT] to ECO,
NSB or MAN.