10
English
6.2 Display Messages
The display indicates various operating modes
and faults . If there is an acoustic warning sig-
nal in case of a fault, press the button BUZZER
(5) to deactivate this signal .
6.2.1 Inputs
Priority Input
Be Careful..
This message keeps flashing on the display as
long as a signal is available at the input PRIOR-
ITY IN (19) . The input PGM IN (18) is muted .
AMP Sleeping
Be Careful..
This message is displayed when the input
signal is missing for one minute and
ON
has
been set in the line
AMP SLEEP?
of setting
menu 1 . The amplifier is in the sleep mode . It
is switched on again when the button ESC (5)
or the knob PUSH / LEVEL (8) is pressed or
when the input signal is available again .
If the signal is missing for four minutes,
the amplifier will change to the standby mode
and the LED STAND-BY (12) will flash . The
amplifier will change from standby mode to
operation mode as soon as an input signal is
available or the button POWER (11) is pressed .
6.2.2 Power supply
AC Line Check
LOW VOLTAGE
This message appears when the mains voltage
falls below approx . 190 V . In this case, the
power amplifier is switched off .
VOLUME STATUS
[ .. ] [DC LOW]
If the amplifier is connected to an emergency
power supply unit and the mains voltage fails,
the amplifier will switch to the emergency
power supply . If the setting
YES
was selected
in the line
BATTERY?
of setting menu 1, the
display will alternately show
[BATT.]
and
[Normal]
beneath the line
STATUS
.
Battery Check
LOW VOLTAGE
This message appears when the voltage of the
emergency power supply unit falls below ap-
prox . 21 V and the setting
YES
was selected
in the line
BATTERY?
of setting menu 1 . The
standard display will reappear after approx .
30 seconds or when the button ESC (5) is
pressed:
VOLUME STATUS
[ .. ] [DC LOW]
The line beneath the line
STATUS
, how-
ever, will alternately show
[DC LOW]
and
[Normal]
.
6.2.3 Overload
SKP-LINE SHORT
Output MUTE
This message appears when there is a short
circuit at the speaker output . The speaker
output is muted .
OVER CURRENT
Protection
This message appears when the power con-
sumption is too high (e . g . speaker output
overloaded or fault in the amplifier) . The
standard display will reappear after approx .
30 seconds or when the button ESC (5) is
pressed:
VOLUME STATUS
[ .. ] [OCP ON]
The line beneath the line
STATUS
, how-
ever, will show
[OCP ON]
. The protective
circuit has switched off the power ampli-
fier . To find the fault, disconnect the screw
terminal SPEAKER OUTPUT (17) and then
press the button OCP RST (10), using a thin,
non-conductive object . The power amplifier
is switched on again . If no fault indication
appears, the fault is due to the speaker cable
or the speakers . If the fault indication reap-
pears, the amplifier is defective and must be
repaired .
6.2.4 Overheating
OVER TEMP
Limited Output
This message appears when the amplifier is
overheated (e . g . in case of insufficient heat
dissipation) . The output power is limited to
1
⁄
8
of the rated power . The standard display will
reappear after approx . 30 seconds or when
the button ESC (5) is pressed:
VOLUME STATUS
[ .. ] [ LIMIT]
The line beneath the line
STATUS
, how-
ever, will alternately show
[LIMIT]
and
[HEATED]
. If the temperature of the heat
sink continues to rise, the speaker output
will be muted and the following message
will appear:
OVERTEMP MUTE
Output Mute
The standard display will reappear after
approx . 30 seconds or when the button
ESC (5) is pressed:
VOLUME STATUS
[ .. ] [ MUTE ]
The line beneath the line
STATUS
, how-
ever, will alternately show
[MUTE]
and
[HEATED]
. As soon as the temperature is
back to normal, the amplifier returns to the
rated output power .
6.2.5 Amplifier fault
AMP FAULT
Please AMP Check
This message appears when the micropro-
cessor of the PA-1250D has detected a fault
in the power amplifier by means of a test
signal . A self-test is performed when the fol-
lowing conditions are met: ON is selected in
the line
AMP CHECK?
of the setting menu 1
(
☞
chapter 6) and no input signal is available .
The standard display will reappear after ap-
prox . 30 seconds or when the button ESC (5)
is pressed:
VOLUME STATUS
[ .. ] [ Fault]
The line beneath the line
STATUS
, however,
will show
[Fault]
.
7 Specifications
Block diagram see page 29
Output power
Rated power: . . . . . . . .250 W
Music power:: . . . . . . .350 W
THD: . . . . . . . . . . . . . . . .< 0 .5 %
Speaker output: . . . . . . .100 V, min . load
impedance: 40 Ω
Inputs: . . . . . . . . . . . . . .1 .2 V, 30 kΩ, bal .
Frequency range: . . . . . .50 – 18 000 Hz,
± 3 dB
S / N ratio: . . . . . . . . . . . .> 100 dB
(A weighted)
High-pass filter: . . . . . . . .200 Hz, 6 dB / oct .
Power supply
Mains operation: . . . . .230 V / 50 Hz
Power consumption: . .350 VA max .,
8 W standby
Emergency
power supply: . . . . . . .24 V (
⎓
)
Power consumption: . .20 A max .,
280 mA standby
Ambient temperature: . .0 – 40 °C
Dimensions
(W × H × D): . . . . . . . . . .482 × 88 ×
410 mm, 2 RS
Weight: . . . . . . . . . . . . .7 .5 kg
Subject to technical modification .
All rights reserved by MONACOR
®
INTERNATIONAL GmbH & Co. KG. No part of this instruction manual
may be reproduced in any form or by any means for any commercial use.
