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The LED should then go off. See Section 6.1.2 for other LED indications.
If it is desired to completely power off (de-energize) the loudspeaker,
a conveniently located AC mains disconnect must be supplied or
the power cable must be unplugged from the loudspeaker or the AC
mains supply.
The PowerCon connector is a locking connecter. To lock, twist 1/4 turn
clockwise after fully inserting into the jack. It is recommended the
connection be made at the loudspeaker before connection to the AC
mains supply.
5.3.4 AC MAIN FUSE:
If excessive AC mains input current is detected, the replaceable fuse will
blow. This can occur for a variety of reasons, such as internal failure,
excessive AC mains voltage, or excessive amplifier output levels.
If the fuse blows, replace it only with a fuse of the correct type and
rating as listed below. In the unlikely event the fuse blows again, inter-
nal failure is indicated. This will require troubleshooting and repair
by a qualified service technician. Do not attempt further use of the
loudspeaker until such repairs are made. See Section 8.2 “Troubleshooting”.
Fuse Type: AGC (0.25 in x 1.25 in) slow-blow
Rating: 115 V AC 230 V AC
DSA230 4 A 2 A
DSA250 8 A 4 A
5.4 Grounding
5.4.1 ELECTRICAL GROUND
Ensure that the AC mains grounding conductor in the power cable is
properly grounded in accordance with applicable electrical codes.
5.4.2 AUDIO GROUND
The Audio Ground Lift switch may help isolate audio ground loops.
This dip switch disconnects the shield pins on all the audio connectors
from the internal audio ground. This affects the audio shield pins on
the Audio A and Audio B connectors. Use this switch as needed for
reducing ground loop noise.
21
POWER END
CAP
FUSE
HOUSING
Figure 5.3.4 Fuse
Figure 5.3.3 Connecting AC Mains
ON
OFF
LIFT
GROUND LIFT SWITC
H
SIGNAL END
EIA-485
TERMINATE
AUDIO
GROUND
LIFT
LIFT
PHOENIX
CONNECTORS
AUDIO A
AUDIO B
2X
AUDIO
SHIELD
PINS
EMI
FILTER
EMI
FILTER
AUDIO
GROUND
LIFT
SWITCH
CHASSIS/MAINS
GROUND
AUDIO
GROUND
Figure 5.4.2a Ground Lift Switch
Figure 5.4.2b Ground Lift Function