BSS Audio DPR-901II Owner's Manual - Manual (Page 8)

8
DPR-901ii
Voltage Setting
Safety Earthing
AC Power Fusing
2.4 Voltage Setting The mains voltage selector switch provides a simple external adjustment
to allow operation on all international AC power standards. The allow-
able ranges for the supply voltage are:
96VAC up to 132VAC on the 115V position and
195VAC up to 264VAC on the 230V position.
An additional internal tap change is available for 100V working. Refer
to Appendix A.2. The tap change gives:
90VAC up to 110VAC on the 120V position
Outside these ranges the unit will not work satisfactorily, if at all.
Voltages in excess of the maximum will probably cause damage.
Voltages below the minimum will cause the power supplies to drop
out of regulation, degrading the performance of the system.
The Green and Yellow wire of the mains cord must always be con-
nected to an installation Safety Earth or Ground. The Earth is essential
for personal safety as well as the correct operation of the system, and
is internally connected to all exposed metal surfaces. Any rack frame-
work into which this unit may be mounted is assumed to be connected
to the same grounding circuit.
The incoming mains power is fused within the DPR901ii by the fuse
holder mounted on the rear panel. Should it be necessary, the fuse
must be replaced by one of the same size and current rating.
20mm T250mA for the 230V setting
20mm T315mA for the 115V setting
It is most important for continued safety that this specification is strictly
adhered to. Spare fuses of the correct rating are supplied with the unit
from new.
It is unlikely that the AC fuse will fail during normal use and caution
should be exercised if it does. The most likely reason at first power up
is the incorrect setting of the mains voltage switch on the rear panel.
Alternatively the unit may have been connected across two lines of a
three phase supply. In both of these cases the internal transient sup-
pressors may have been damaged and will continue to blow replace-
ment fuses, even if the supply is now correct. The suppressors will
have protected the DPR-901ii from damage and need replacing
before the unit can be used again.
Refer to Appendix A.1 for the replacement procedure.
2.5 Safety Earthing
2.6 AC Power
Fusing