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230V
50-60 Hz
870 WATTS
MAINS FUSE
T10A/L/250V
CAUTION:
FOR CONTINUED PROTECTION AGAINST RISK OF FIRE
REPLACE WITH SAME TYPE AND VALUE FUSE INDICATED.
ATTENTION:
REMPLACER PAR UN FUSIBLE DE MEME TYPE
COMME INDIQUE.
AUDIO TRANSFORMER OUTPUTS
B
LOW IMPEDANCE
+
100V
BRIDGED
1200W/8
+
+
25V
70V
B
DUAL
+
600W
4
100
70
0
DIRECT OUTPUTS
ISOLATED OUTPUTS
S
--
PIN 1: SHIELD
PIN 2: a, +
PIN 3: b, -
+
Instructions On How To Install NRS 90208 Extension Kits
•
unplug the power amplifier from the mains
•
detach all screws holding the cover plate of the appliance
•
lift and remove the cover plate
•
disconnect the flat-wire cable of the printed board assembly 81340/1
•
detach all screws holding the printed board assembly 81340/1
•
remove the printed board assembly 81340/1 and unsolder the resistors R106 ... R109
•
attach insulators to the input transformers according to the corespondent marks on the printed board
assembly
•
re-assemble the appliance by performing all steps described in the opposite order
CIRCUIT
TO
CHASSIS SWITCH
POWER
GROUNDED
UNGROUNDED
SEE OPERATING MANUAL!
WARNING:
TO REDUCE THE RISK OF FIRE
OR ELECTRIC SHOCK, DO NOT EXPOSE THIS
APPLIANCE TO RAIN OR MOISTURE.
AVIS:
RISQUE DE CHOC ELECTRIQUE. NE PAS OUVRIR.
A
+
+
100V
+
+
70V
25V
A
+
0
70
100
OUTPUT WIRING MUST BE CLASS 1
Inputs INPUT CHANNEL A&B
With an input sensitivity of 775 mV = 0 dBu and an input impedance of
20 k ohms, the electronically balanced inputs – INPUT CHANNEL A&B
– are meant for the connection of control amplifiers, audio controllers,
+
mixing consoles, etc.
Peripheral pieces of audio equipment are either connected via the XLR-
type input connectors or using the parallel-linked binding posts. For the
latter option you can utilize the supplied screw-plugs. Thus, carrying the
audio signals through to feed additional power amplifiers can be conve-
niently achieved without the need for special split-cables.
The XLR-type input connectors' pin-assignment is in accordance to the
IEC 268 standard:
In case the controlling device does not supply balanced output connec-
tors, it is also possible to configure the connectors for unbalanced ope-
ration. Therefore, the common ground (pin 1) has to be connected to the
(–) input (pin 3). The audio signal is now solely fed through the (+) input
(pin 2).
So, to be able to entirely make use of all the advantages the electroni-
cally balanced input stage offers – like the suppression of humming and
interference noise – it is beneficial to re-establish balanced input con-
nection whenever possible.
CAUTION
CHANNEL B
RISK OF ELECTRIC SHOCK
INPUTS
DO NOT OPEN
POWER REMOTE
+
+24V
ON
0V
OFF
NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
19
CHANNEL A
INPUTS
INPUT
ROUTING
-6
-6
+
-5
-5
+
-4
-4
-9
-9
-3
-3
DUAL
-12
-12
-2
-2
-16
-16
-1
-1
-30
-30
0 dB
0 dB
LEVEL
LEVEL
PARALLEL
DPA 4260
121715
MADE IN GERMANY
BRIDGED MODE
NORMAL
BRIDGED
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