EAW Comprehensive Guide for NT29 Speaker Amplifier Service and Replacement

8 . 5 A m p l i f i e r S e r v i c e

WARNING: Disconnect the ac mains cable before doing this procedure.

ATTENTION: Déconnectez le cordon du secteur avant d'entamer cette procédure.

ATTENZIONE: Prima di procedere con questa operazione, disconnettere il cavo d'alimentazione AC.

PRECAUCION: Desconecte el cable de alimentación antes de realizar este proceso.

WARNUNG: Ziehen Sie den Netzstecker aus der Steckdose, bevor Sie mit dieser Prozedur beginnen.

Faulty electronics are serviced by replacing the entire amplifier module.

8 . 5 . 1 A m p l i f i e r M o d u l e s

There are two types of NT amplifier modules:

one for the NT full-range models and one for the subwoofer.

1.Full-range: Input, DSP, 1000 W @ 4 ohm LF amplifier, 500 W @ 4 ohm HF amplifier, and power supply.

2.Subwoofer: Input, DSP, two 1000 W @ 4 ohm amplifiers, and power supply.

For the NT full-range models (NT2x & NT5x), each amplifier module has the DSP settings for all models stored in on-board memory. The active settings are determined by on-board dip switch settings. Thus,amplifier modules for the full-range models are interchangeable by simply resetting the dip switches for that particular model.

8 . 5 . 2 N T A m p l i f i e r R e p l a c e m e n t M o d u l e s a n d D i p S w i t c h S e t t i n g s

An amplifier replacement module consists of the power amplifiers, DSP board, power supply, connectors, and indicators; all pre-mounted on the amplifier panel.

Amplifier Module Replacement Part Numbers & Dip Switch Settings

NOTE: If the incorrect DIP switch position is used, poor/incorrect performance will result, at best sounding bad, at worst causing equipment failure.

NT Model #	115 V Module	230 V Module		Dip Switch Settings
			1		2	3	4
NT26	#0016088	#0016584	Off		Off	Off	Off
NT29	#0016088	#0016584	Off		Off	Off	On
NT56	#0016088	#0016584	Off		Off	On	Off
NT59	#0016088	#0016584	Off		Off	On	On
NTS22	#0016090	#0016585	Off		On	Off	Off

NOTE: Off is up, On is down.

8 . 5 . 3 R e p l a c i n g t h e A m p l i f i e r M o d u l e

1.Remove the amplifier module from the other side of the enclosure by removing its12 retaining screws.

2.Disconnect the quick release connector for the transducer cabling.

3.Configure the replacement amplifier for the NT model by setting the dip switch. See the chart in Section 8.5.2 for the correct settings. The dip switch is located behind the input receptacles on the backside of the amplifier module.

4.Once the dip switch is programmed, connect the transducer cabling to the replacement module.

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