Replacing CAPs in NAD C370

silversweden · 29th January 2008, 08:59 PM

Hello i am working on two nad c370.

Allt the bigger electrolyts are swollen because of heat
(they put them in a gym in a closed box, smart

and needs to be replaced.

4x10 000uF 80V

2x1000uF 100V (power supply)

2x2200uF 50V (preamp or something)

Just want to hear with you experts if there is something
i should consider or maybe some tips?

Dont want to buy original NAD parts think it will be the double
price.

Jamicon, is it a god Brand? Considering replacing
All electrolyts with Jamicon same value.

Think it should be OK, but i want to hear from you guys.

Also, should i replace the smaller one because of the heat?
Even if they work i mean. Maybe i should consider it.

Let me hear!

rob3262 · 29th January 2008, 10:27 PM

As long as the caps aren't in the signal path, I wouldn't be real worried about the manufacturer

My

- Rob

silversweden · 30th January 2008, 04:14 AM

ok, i noticed that the "Big" lyts have 4 legs.
3 positive and 1 negative.

But i supposde 3 of them are common and
itshould work fine with just 2 of them?

Or ill have to look at the schematic.

Now i got worried :P buying parts today

jaycee · 30th January 2008, 10:40 PM

Standard 2-pin ones will be fine. The other pins are just mounting pins, and most often arent connected to anything at all in the case.

Jamicon should be just fine.

Leolabs · 31st January 2008, 01:04 AM

Musical Fidelity does use a lot of Jamicon caps,so need not to worry much.You can try other brand too like BHC or Cornell Dubilier for the big caps.

bluewave · 22nd October 2009, 03:28 PM

Hello, I've been advised by NAD to have caps replaced in my c370 for a protection circuit fault. It is long out of warranty, and so I am contemplating doing this job myself.

They recommend the main filter caps and the protection circuit caps. I have found several web pages that walk through doing the protection circuit (4.7, 10, and 47 uF all 50v) but haven't seen anything specific about the filter caps.

Tracking down parts, it looks like many 10000uF/80v caps are 'snap in.' Wondering if this is possibly the case with the c370, or if replacing them will require removing the main circuit board.

Sorry for the probably dumb question - any advice you guys have on this job would be much appreciated!

Thank you,
Scott

scansp7 · 28th December 2009, 11:52 AM

Did any of you end up going through with this fix? If so where did you get your caps from and how much were they?

pdul · 28th December 2009, 07:26 PM

Brand is not so important as temp. endurance, you should look for 105c caps
and the longest lifespan at that temperature.I know rifa makes some pretty good ones regarding that

pdul · 28th December 2009, 07:27 PM

and for the small ones Panasonic FM or FC

pdul · 28th December 2009, 07:36 PM

And most important. A happy new year to all of you!

29th January 2008, 08:59 PM	#1
silversweden diyAudio Member Join Date: Oct 2007	Replacing CAPs in NAD C370 Hello i am working on two nad c370. Allt the bigger electrolyts are swollen because of heat (they put them in a gym in a closed box, smart and needs to be replaced. 4x10 000uF 80V 2x1000uF 100V (power supply) 2x2200uF 50V (preamp or something) Just want to hear with you experts if there is something i should consider or maybe some tips? Dont want to buy original NAD parts think it will be the double price. Jamicon, is it a god Brand? Considering replacing All electrolyts with Jamicon same value. Think it should be OK, but i want to hear from you guys. Also, should i replace the smaller one because of the heat? Even if they work i mean. Maybe i should consider it. Let me hear!

29th January 2008, 10:27 PM	#2
rob3262 diyAudio Member Join Date: Jan 2005 Location: southern New Hampshire	As long as the caps aren't in the signal path, I wouldn't be real worried about the manufacturer My - Rob __________________ Scientific Principle and Common Sense

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30th January 2008, 04:14 AM	#3
silversweden diyAudio Member Join Date: Oct 2007	ok, i noticed that the "Big" lyts have 4 legs. 3 positive and 1 negative. But i supposde 3 of them are common and itshould work fine with just 2 of them? Or ill have to look at the schematic. Now i got worried :P buying parts today

30th January 2008, 10:40 PM	#4
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	Standard 2-pin ones will be fine. The other pins are just mounting pins, and most often arent connected to anything at all in the case. Jamicon should be just fine.

31st January 2008, 01:04 AM	#5
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	Musical Fidelity does use a lot of Jamicon caps,so need not to worry much.You can try other brand too like BHC or Cornell Dubilier for the big caps.

22nd October 2009, 03:28 PM	#6
bluewave diyAudio Member Join Date: Oct 2009	Hello, I've been advised by NAD to have caps replaced in my c370 for a protection circuit fault. It is long out of warranty, and so I am contemplating doing this job myself. They recommend the main filter caps and the protection circuit caps. I have found several web pages that walk through doing the protection circuit (4.7, 10, and 47 uF all 50v) but haven't seen anything specific about the filter caps. Tracking down parts, it looks like many 10000uF/80v caps are 'snap in.' Wondering if this is possibly the case with the c370, or if replacing them will require removing the main circuit board. Sorry for the probably dumb question - any advice you guys have on this job would be much appreciated! Thank you, Scott

28th December 2009, 11:52 AM	#7
scansp7 diyAudio Member Join Date: Mar 2005 Location: california	Did any of you end up going through with this fix? If so where did you get your caps from and how much were they?

28th December 2009, 07:26 PM	#8
pdul diyAudio Member Join Date: Jan 2009	Brand is not so important as temp. endurance, you should look for 105c caps and the longest lifespan at that temperature.I know rifa makes some pretty good ones regarding that

28th December 2009, 07:27 PM	#9
pdul diyAudio Member Join Date: Jan 2009	and for the small ones Panasonic FM or FC

28th December 2009, 07:36 PM	#10
pdul diyAudio Member Join Date: Jan 2009	And most important. A happy new year to all of you!

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