3.1 Front panel controls
The
Monolog-
Display
DOT
BAR
OFFSET
TEMP
32dB
26dB
20dB
BAL
UNBAL
TRIGGER
10V DC
dB
-13
-16
-19
-22
-25
-28
-31
-34
-37
-40
-10
-7
-5
-3
-1
0
+1
+2
+3
Monolog
2
3
7
8
6
5
4
1
A single control is found on the
Monolog
front panel: the STANDBY/POWER
switch. This push button controls the microprocessor driven logic circuitry which in
turn starts the soft power-up circuit limiting the rush-in current, the main power relays
and the output stages. If you desire to use the
AUTO-POWER
function (see
3.2
“
AUTO
“ switch), you need to depress the corresponding push button. When turned
off, the
Monolog
amplifier is electrically disconnected from AC mains, thus it will
not use any power.
[ 1 ]
Status LED
This LED will light to indicate that the unit is turned on and functioning normally. A
flashing
Status LED
(
1
) indicates a malfunction. Should the operating temperature of
the unit reach its maximum permissible value the output relays will be automatically
de-activated (no sound) and the
TEMP LED
(
5
) will be lit while the
Status LED
(
1
)
blinks. Once the temperature returns to normal design parameters, the output relays
will re activated, the
Status LED
(
1
) will be constant and the
TEMP LED (
5
)
dims.
If
the DC-protection circuit detects DC present at the output terminals, the
Status LED
(
1
) flashes, the
OFFSET LED
(
5
) brightens and the output relays will be de-activated
to protect the loudspeakers. In this case the amplifier must be switched off to reset
the protection circuit. The
Monolog
can be powered up again after approx. 10
seconds. If the
OFFSET-LED
(
5
) is still rightly lit and the
Status-LED
(
1
) is flashing,
there may be a defect in the output stage and the unit must be sent in for service.
