Operating Elements And Connections; Front Panel; Rear Panel; Safety Notes - Monacor PA-1250D Mode D'emploi

All operating elements and connections de -
GB
scribed can be found on the fold-out page 3.
1 Operating Elements
and Connections

1.1 Front panel

1 Display
2 Button MENU
To activate one of the setting menus, keep
the button pressed for two seconds until
EDITING MODE starts flashing on the dis-
play. Then either press the knob PUSH/
LEVEL (8) to activate menu 1 (fig. 3) or press
the button MENU again to activate menu 2
(fig. 4).
The first line of the menu is selected. To go to
the next menu line, briefly press the button
MENU.
3 Button SELECT to change the setting in the
menu line selected
4 Button ENTER / INFO
When the setting menu is activated
to save the menu settings and exit the
menu
When no menu is activated
to activate info menu 2 (fig. 6)
5 Button ESC / BUZZER
– To exit the menus
– If there is an acoustic warning signal in
case of a fault, press the button to deacti-
vate the warning signal.
6 Button MASTER RST to reset the master
microprocessor
7 LEDs
CLIP lights up when the amplifier is over-
loaded. Reduce the volume accordingly.
SIG lights up when a specific signal volume
has been reached.
ON lights up when the amplifier is switched
on.
8 Knob PUSH / LEVEL
To adjust the volume, first press the knob for
two seconds until VOLUME SETTING
pears on the display. Then turn the knob to
adjust the volume. Finally briefly press the
knob to save and lock the volume adjusted.
To show the amplifier settings, briefly press
the knob. The information is inserted on
the display (fig. 5). Press the button MENU
(2) to go to the next line. To exit the infor-
mation menu, press the button ESC (5).
9 Button CPU RST to reset the second micro-
processor
10 Button OCP RST to reset the protective cir-
cuit when OVER CURRENT appears on the
display ( chapter 7)
11 Button POWER to switch between operation
mode (press button briefly) and standby
mode (keep button pressed until the display
is extinguished)
12 LED STAND-BY: lights up when the amplifier
is in standby mode
8

1.2 Rear panel

To make handling easier, all green screw termi-
nals (15, 17, 18, 19) can be disconnected from
their plug-in connections.
13 Mains jack for connection to a socket
(230 V~/50 Hz) via the mains cable provided
14 RS-485 interface for remote control of the
amplifier, e. g. via a PC
15 Screw terminal AC PWR REMOTE for a
switch to change between operation mode
and standby mode via remote control
16 Support for the mains fuse
Always replace a blown fuse by one of the
same type.
17 Screw terminal SPEAKER OUTPUT to con-
nect the PA speakers
18 Screw terminal PGM IN for the input signal
19 Screw terminal PRIORITY IN for an input sig-
nal taking priority over the signal at the input
PGM IN (e. g. for emergency announce-
ments): As soon as a signal is present at the
terminal PRIORITY IN, the signal at the ter-
minal PGM IN is muted.
20 Screw terminal 24 V
power supply unit.

2 Safety Notes

This unit corresponds to all relevant directives of
the EU and is therefore marked with
WARNING The unit uses dangerous mains
voltage (230 V~). Leave servicing
to skilled personnel only and do
not insert anything into the air
vents! Inexpert handling of the unit
may result in electric shock.
During operation, there is a hazard of contact
with a dangerous voltage up to 100 V at the
speaker terminals (17). Always switch off the
amplifier before making or changing any con-
nection.
Please observe the following items in any case:
G
The unit is suitable for indoor use only. Protect
it against dripping water and splash water,
high air humidity and heat (admissible ambi-
ap -
ent temperature range: 0 – 40 °C).
G
Do not place any vessel filled with liquid on the
unit, e. g. a drinking glass.
G
The heat generated inside the unit must be
dissipated by air circulation; never cover the
air vents of the housing.
G
Do not operate the unit and immediately dis-
connect the mains plug from the socket
1. if the unit or the mains cable is visibly dam-
aged,
2. if a defect might have occurred after the unit
was dropped or suffered a similar accident,
3. if malfunctions occur.
In any case the unit must be repaired by
skilled personnel.
G
Never pull the mains cable to disconnect the
mains plug from the socket, always seize the
plug.
G
For cleaning only use a dry, soft cloth; never
use water or chemicals.
G
No guarantee claims for the unit and no liabil-
ity for any resulting personal damage or mate-
rial damage will be accepted if the unit is used
for other purposes than originally intended, if it
is not correctly connected or operated, or if it
is not repaired in an expert way.

3 Applications

The amplifier PA-1250D with a 250 W
power is specially designed for PA systems. It is
equipped with a switch mode power supply unit
and a class D power amplifier and provides an
efficiency of more than 90 %. An LC display
shows the most important operating parameters
and allows to make settings via a menu.

4 Setting up the Amplifier

The amplifier is designed for installation into a
for an emergency rack for units of a width of 482 mm (19") but can
also be used as a tabletop unit. In order to
ensure sufficient cooling of the amplifier, air must
always be able to flow freely through all air vents.

4.1 Rack installation

.
For rack installation, the amplifier requires a
space of 2 RS (2 rack spaces = 89 mm). To pre-
vent the rack from becoming top-heavy, insert
the amplifier into the lower section of the rack.
The mounting brackets are not sufficient for fix-
ing it safely; additionally use lateral rails or a bot-
tom plate to secure the unit.
The hot air given off by the amplifier must be
dissipated from the rack; otherwise heat will
accumulate in the rack which may not only dam-
age the amplifier but also other units in the rack.
In case of insufficient heat dissipation, install a
ventilation unit into the rack.

5 Connecting the Amplifier

All connections must be made by skilled person-
nel. Always switch off the amplifier before mak-
ing any connection!
To make handling easier when screwing on
the connection cables, all green screw terminals
(15, 17, 18, 19) can be disconnected from their
plug-in connections.
1) For making announcements and repro-
ducing music, a PA preamplifier (e. g. PA-
1412MX from MONACOR) is required which
allows connection of microphones and audio
units (e. g. CD player, radio). Connect the
output of the preamplifier to the input PGM IN
(18).
2) For making emergency announcements or
other important announcements, the PA-
1250D is equipped with the input PRIORITY
IN (19). As soon as a line level signal is pres-
ent at this input, the input PGM IN is muted so
that only the emergency announcement is
audible.
If the unit is to be put out of operation
definitively, take it to a local recycling
plant for a disposal which is not harmful
to the environment.
RMS
output