BSS Audio FCS-960 Owner's Manual - Manual (Page 8)

8
FCS-930/960
AC Voltage Setting
Safety Earthing
AC Power Fusing
4.1 Voltage Setting The mains voltage selector switch provides simple, external adjustment
for operation on all international AC power standards. At each switch
position there is an acceptable tolerance over which the performance of
the unit will not be affected and this is 90v-132v for the 120v position,
and 190v-264v for the 240v position. If you subject the unit to voltages
in excess of this you are likely to cause damage. If the mains voltage is
below those specified, there will be reduced performance before the unit
finally fails to work.
The green/yellow wire of mains cord must always be connected to the
electrical installations Safety Earth or Ground. It is essential for personal
safety, as well as proper operation of the unit, and is internally
connected to all exposed metal surfaces. Any rack framework that this
unit might be mounted into is assumed to be connected to the same
grounding circuit. The FCS-930/960 has electronically balanced audio
connections and does not need disconnection of any safety earth for the
avoidance of hum loops.
The incoming mains power is fused within the FCS-930/960 by the fuse
holder mounted on the rear panel. If it needs to be replaced it must be
properly rated as: 20mm T200mA for 240v mains operation, and
T250mA for 120v mains operation. It is most important for continued
safety that this specification is adhered to, and you will have found that a
spare fuse of this rating is supplied together with your unit and manual.
It is very unlikely that this fuse will fail during normal use, and must be
treated with some caution as to the cause, if it should do so. One of the
most likely reasons will be following the incorrect setting of mains
voltage switch on the rear panel. Another reason can be the inadvertent
connection of line to line rather than line to neutral phase voltages when
using a three phase power connection. In either case internal transient
suppressors can become damaged and will consistently blow
replacement fuses. You can be assured that they have protected your
unit from damage, but they will need removal to allow further use of
your unit, and should be replaced as soon as possible to ensure
continued protection. If you feel this has happened please refer to the
appropriate section at the rear of this manual for the removal and
replacement procedure.
4.2 Safety Earthing
4.3 AC Power
Fusing