dead NAD 304

Xicarius · 30th August 2006, 08:02 AM

i've got an nad 304 amp, just the amp (can't find the remote) thats dead- won't power on. looks to me like the transformer is dead (multimeter can't get any voltage anywhere bar the power switch.)

offer?

2002tii · 31st August 2006, 01:54 PM

Probably the termal fuse in the transformer that`s blown.
Happens quite often on these amps...

You can put a fuse across it, I think it is the black and the white wire on the little pcb by the transformer to get it working again.
I have done this several times, but cant remember 100% the color of the wire but you can measure it.

Of course the termal fuse is now bypassed and safety goes down the hill;-))

anatech · 31st August 2006, 03:26 PM

Hi Xicarius,
Unplug your unit and measure resistance across the primary wires. If you have continuity there, measure each leg to the plug end. If you get continuity between the ends at the plug, your problem is else where.

Joining P16 to P14 will bypass the thermal fuse, but you should replace it with a similar type if you can. Look for the type used in coffee makers and so forth.

-Chris

anatech · 31st August 2006, 03:27 PM

Hi Xicarius,
Moved you to the solid state forum. You will get more attention here.

-Chris

Xicarius · 1st September 2006, 01:59 AM

Interesting suggestions- which I'll have to look into, but I'll be honest & say I'm interested in any offers to buy it as is...

Leolabs · 1st September 2006, 02:02 AM

No doubt.NAD makes good amps.

Leolabs · 1st September 2006, 02:04 AM

I have the service manual.If you are interested,I can email it for you.

anatech · 1st September 2006, 03:16 AM

Hi Xicarius,
It's almost worth nothing not working. Pocket change. What range where you thinking? I'm not interested, the shipping far exceeds what it's worth.

-Chris

bekim · 1st September 2006, 07:04 AM

Hi all,

I have one NAD 304 in non working condition. Schema will be nice if someone can send it to me.

Thanks

bekimh@gmail.com

nlRenderman · 25th May 2010, 12:17 PM

I have an NAD 304, it's transformer doenst output any voltage, and it is not the thermal fuse. I think the primary coil is fried. I can not read the voltages in the schematic. Would anyone owning a NAD 304 be so kind as to measure the voltages? They are probably around 35 and 70 AC volts. Then i can look for a replacement transformer.

Thanks in advance,

Mike

30th August 2006, 08:02 AM	#1
Xicarius diyAudio Member Join Date: Aug 2004 Location: Sydney	dead NAD 304 i've got an nad 304 amp, just the amp (can't find the remote) thats dead- won't power on. looks to me like the transformer is dead (multimeter can't get any voltage anywhere bar the power switch.) offer?

31st August 2006, 01:54 PM	#2
2002tii diyAudio Member Join Date: Apr 2002 Location: Norway	Probably the termal fuse in the transformer that`s blown. Happens quite often on these amps... You can put a fuse across it, I think it is the black and the white wire on the little pcb by the transformer to get it working again. I have done this several times, but cant remember 100% the color of the wire but you can measure it. Of course the termal fuse is now bypassed and safety goes down the hill;-)) __________________ Regards Dan M.

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31st August 2006, 03:26 PM	#3
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi Xicarius, Unplug your unit and measure resistance across the primary wires. If you have continuity there, measure each leg to the plug end. If you get continuity between the ends at the plug, your problem is else where. Joining P16 to P14 will bypass the thermal fuse, but you should replace it with a similar type if you can. Look for the type used in coffee makers and so forth. -Chris

31st August 2006, 03:27 PM	#4
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi Xicarius, Moved you to the solid state forum. You will get more attention here. -Chris

1st September 2006, 01:59 AM	#5
Xicarius diyAudio Member Join Date: Aug 2004 Location: Sydney	Interesting suggestions- which I'll have to look into, but I'll be honest & say I'm interested in any offers to buy it as is...

1st September 2006, 02:02 AM	#6
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	No doubt.NAD makes good amps.

1st September 2006, 02:04 AM	#7
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	I have the service manual.If you are interested,I can email it for you.

1st September 2006, 03:16 AM	#8
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi Xicarius, It's almost worth nothing not working. Pocket change. What range where you thinking? I'm not interested, the shipping far exceeds what it's worth. -Chris

1st September 2006, 07:04 AM	#9
bekim diyAudio Member Join Date: Jul 2004 Location: Prishtina, Kosova	Hi all, I have one NAD 304 in non working condition. Schema will be nice if someone can send it to me. Thanks bekimh@gmail.com

25th May 2010, 12:17 PM	#10
nlRenderman diyAudio Member Join Date: Jan 2007 Location: Holland	I have an NAD 304, it's transformer doenst output any voltage, and it is not the thermal fuse. I think the primary coil is fried. I can not read the voltages in the schematic. Would anyone owning a NAD 304 be so kind as to measure the voltages? They are probably around 35 and 70 AC volts. Then i can look for a replacement transformer. Thanks in advance, Mike

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