Eaw DSA250 & DSA230 User Manual download pdf (Page 21)

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.

POWER END

CAP

FUSE

HOUSING

Figure 5.3.4 Fuse

Figure 5.3.3 Connecting AC Mains

OFF

LIFT

GROUND LIFT SWITC

SIGNAL END

EIA-485

TERMINATE

AUDIO

GROUND

LIFT

PHOENIX

CONNECTORS

AUDIO A

AUDIO B

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

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Eaw DSA250 & DSA230 User Manual Page 21

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