Controls And Functions - rcf UP 4061 Manual De Uso Y De Instalación

- Dual power supply in alternating current
(115/230 Vac)
- 24 Vdc power supply
- Removable front knobs, with closure caps

Controls and functions

(Fig. 1 - page 42)
1) Bass tone control
This knob emphasizes (clockwise rotation) or
attenuates (anti-clockwise rotation) the low
frequencies. With the knob in the central position,
the frequency response is not altered. To prevent
the level from being modi ed, the knob can be
removed and the hole can be covered using the
special cap supplied.
2) Treble tone control
This knob emphasizes (clockwise rotation) or
attenuates (anti-clockwise rotation) the high
frequencies. With the knob in the central position,
the frequency response is not altered. To prevent
the level from being modi ed, the knob can be
removed and the hole can be covered using the
special cap supplied.
3) Master volume control
This knob is used for adjusting the nal volume of
the signal present on the speaker POWER
OUTPUTS (ref. 12 and 14). To prevent the master
volume from being modi ed, the knob can be
removed and the hole can be covered using the
special cap supplied.
4) POWER switch
For switching the power ampli er on and o .
5) "STD-BY" light
This led lights up when the unit is in "stand-by"
mode.
6) OVERLOAD indicator light
This light comes on when the power ampli er is
operating in overload, a condition which is
generally caused by a problem on the speaker
line.
NOTE: When the power ampli er is switched on,
the OVERLOAD light comes on for a few seconds,
but this is part of normal operation and does not
indicate a problem, as a preliminary test is carried
out each time the power ampli er is switched on.
7) SIGNAL light
This light comes on when the audio signal is
ready on the POWER OUTPUTS of the speakers.
8) PEAK light
This light comes on when the volume is set at to
excessively high levels, and the audio signal on
the speaker outputs is distorted. For correct use
of the power ampli er, it is necessary to adjust
the master volume in such a way as not to cause
this light to come on, though momentary lighting
up is acceptable.
9) ON light
This light comes on when the power ampli er is
switched on.
10) Terminals for direct current supply
These two terminals enable the power ampli er to
be supplied in direct current by means of an
external 24 Vdc source (e.g. 24 V battery).
Whenever the alternating current is interrupted,
the power ampli er is automatically supplied in
direct current, thus ensuring continuous
operation.
NOTE: The unit is not equipped with a battery
charging device for the external battery source,
and thus it is advisable to have an appropriate
charger on hand.
11) DC protection fuse
The fuse that protects the direct current power
supply circuits of the power ampli er can be
accessed by removing the fuse-holder. The fuse
must only be replaced by an
RCF S.p.A. SERVICE CENTRE.
12) Output terminals
These four terminals are used for connecting the
speakers to the 50V, 70V, and 100V outputs.
13) Earth terminal
Used for earthing the metallic parts of the unit
when the current outlet used for power supply is
not equipped with an earth terminal. This
connection must only be made by a quali ed
electrician.
14) Output terminals
These three terminals are used for connecting
speakers to the 4 ohm and 25V outputs.
15) "PRIORITY" terminal
Short circuiting this terminal with terminal (16)
(e.g. using an electrical contact) activates the
priority function of BALANCED IN over
UNBALANCED IN, which completely excludes the
latter input (no signal transmitted). This function
can be used, for instance, for transmitting alarm
signals or microphone announcements. In this
case, the UNBALANCED INmust be connected to
the musical source to be used and the BALANCED
IN must be connected to an ampli ed microphone
stand or an alarm source.
16) "GND" terminal
Earth terminal, common to the BALANCED IN and
PRIORITY inputs.
11