OPERATION
BEFORE YOU SWITCH ON
You should make all connections to the Nu-
Vista 300 before switching on.
Follow this routine before you listen for the
first time, and each time you change any
connections.
1
Check all the inputs and outputs to the
Nu-Vista 300.
2
Then check again.
3
Turn the volume control on the pre-
amplifier to nil.
4
Now you can switch on the power.
5
The NU-VISTA 300 has a switch on
delay circuit. This allows the
Nuvistors to warm up and stabilize
before the amplifier is connected to
the loudspeakers.
6
When the mains switch is turned on,
all the LEDs on the front of the PSU
unit should light. If any one of the
LEDs do not light, turn off the power
and recheck all the connections.
7
On the main amplifier unit the yellow
LH STANDBY and yellow RH
STANDBY LEDs will light.
8
After 15 seconds or so the yellow
STANDBY LEDs will go out and the
green OPERATE LED will light.
The amplifier is now ready for use.
WARNING - Heat
When in use the Nu-Vista 300 gives off
heat from its casework.
Never put anything on top of your Nu-
Vista 300.
Always ensure that the unit has adequate
ventilation.
WARNING - PROTECTION CIRCUIT
The NU-VISTA 300 is equipped with a
sophisticated protection circuit. If this cir-
cuit has been activated for any reason,
either of the red PROTECTION LEDs will
light, indicating which channel has been
protected. The amplifier will immediately
go into standby mode. The yellow
STANDBY LEDs will light and the green
OPERATE LED will go out.
After 15 seconds or so, the amplifier will
return to operate mode. If the problem that
caused the protection to operate has been
cleared then operation will resume.
If the condition that caused the protection
circuit to activate is still present, the red
PROTECT LED will light again and the
same sequence will be repeated until the
fault is cleared.
Listed below are possible reasons for the
protection circuit to activate.
a)
Amplifier is being driven into clip-
ping, - reduce volume control
b)
Short circuit on speaker terminals -
check that all speakers wires are ter-
minated correctly. no loose strands of
wire. If bi-wiring check this has
been done correctly.
Nu-VISTA 300 Power Amplifier
Instructions for Use. Page 11 of 12
