Bel Canto Design REF1000 - Manual (Page 7)

Front Panel Indicator Lamp
What to do if there is hum or ground noise:
The small blue LED lamp indicates that
the power is connected to the REF1000
and that the power switch is in the ON
position. If the amplifier detects a fault
or short circuit in the output connec-
tions then it will go into a protection
mode and stop playing. If this occurs
toggle the power switch to the OFF
position and check the speaker cabling
to insure that no speaker output is
either shorted together or connected to
a ground. When you are certain that
the loudspeaker cabling is correct,
power the unit ON again and insure
that the Blue lamp is lit and that music
will play. Fuse Protection
There is an internal fuse protection on
the REF1000. If the power switch is in
the ON position, the power cable is
connected to a functioning power out-
let at the correct voltage and the Blue
lamp is not lit,this indicates that the
internal fuse may have blown. If this
occurs contact your dealer, distributor
or Bel Canto for service. There are no
user replaceable fuses or other parts.
Opening the chassis will void your
warranty.
page 7 © 2005 bel canto design, Ltd.
1) Check that the RCA/XLR switch is in
the correct position for the type of
connection being used.
2) Insure that the preamplifier or any
source components are not produc-
ing hum by setting the preamplifier
to a MUTE or Standby setting.
3) The design of the REF1000 reduces
the chance for ground loop induced
hum but we still recommend that you
use shorter interconnect cables to the
preamplifier and connect all power
cables to a common outlet box or
power conditioner unit to reduce the
possibility for ground current noise
being induced into the audio signal
path. If you choose to power your
source and preamplifier components
from a different AC supply than used
for the REF1000 amplifiers, we recom-
mend that you use a high quality bal-
anced XLR cable driven from a true
balanced XLR preamplifier output. We
do not recommend that you resort to
‘cheater plugs’ or some other means
to disconnect the power ground from
the REF1000 as this may lead to dan-
gerous operation and void the warran-
ty.
REF1000 User’s Guide 1105 Rev.A