Question about NAD C370 2-Channel Amplifier

4 Answers

Power light switches to red.

My amp plays fine for 10 minutes or so then suddenly stops and the green power light turns red. The unit doesn't feel hot at all and the speakers are not having wiring problems. Any thought?

Posted by Scott Strasser on

  • 1 more comment 
  • Anonymous Nov 08, 2007

    The unit goes into protact mode ie; red light with or without speakers.

    I suspect the protection circuit could be faulty as the sound (when working) is good.

  • BodyWorks Nov 14, 2007

    Have a similiar problem with a rather old NAD c320 amp which I am usuing as a switching box and gateway connecting to the graphic equalizer and 2 NAD THX 218 amps in bridge mode.



    This problem has been developing over the past year or so in a more or less prgressive manner.



    The c320 will either be turned off or cuts out (I have the whole system wired to a motion sensor on/off delayed relay switch). When the unit is switched back on it will immediately go into protected mode (which will last anywhere from 20 minutes to several hours before it suddenly resumes functioning properly).



    I've had the unit out to the local tech guy who seemed unable solve the problem for me. Would very much appreciate some advice here...is the problem repairable or should I just invest in a new unit. Many Thanks in advance for any help.



    Alex

    BodyWorks Fitness Centre

    Guernsey

  • crispycronk Jan 18, 2008

    I have a similar problem, the unit trips the protectin circuit when first turned on, after 10 minutes the light goes to green and works fine as long as I dont turn it off.



    The local tech looked at it and said 2 of the large filter caps are fried along with approximatly 38 small caps are cooked.



    He also stated the overall design is poor with low heat rated caps in close procimity to resisters etc that generate heaps of heat.

    The end result is approx 5 hours tech time to repair, cheaper to buy a new amp, DONT THINK IT WILL BE AN NAD THOUGH.

×

Ad

4 Answers

Anonymous

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 26 Answers

This a common problem with NAD amplifiers.
The caps dry up.Look on the protect pcb, this mounted verticaly near the rear of the main pcb, it has a metal frame around it.
Check the 4 x 10000uf smoothing caps, if the tops are not flat, they will need to be replace with 100volt ones.
Also on the right side of the main pcb around a couple of heat sinks there are other caps which dry out.

You have to remove both output modules to remove the main pcb as there is limited access from underneath.

Best of luck
John

Posted on Nov 09, 2007

Ad

Anonymous

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Expert
  • 42 Answers

Hey, check speaker connection as informatica says. Also i have experienced that nad 216thx, 218thx, etc has problem with bad soldering on the psu pcb i the buttton of the chassic, chaeck for bad soldering on this pcb. Might do the work. i have a schematic, one channal only, on my homepage www.miguelovitch.dk best regards michael miguelovitch

Posted on Sep 27, 2007

Ad

Anonymous

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

The problem should be few bad electrolytic capacitors inside the protection circuit. It cause the unit go to protection mode.

Posted on Aug 25, 2007

Greg Cann

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 1,114 Answers

I suggest rechecking the speaker wiring in case there is a small "whisker" of wire touching either the case or adjacent terminal, also check the speaker end of the wires for same. Do you have a pet? I have seen wires chewed partly through by cats (& rabbits)! See the information from the manual below: http://207.228.230.231/manual/NAD-C370.pdf

Posted on Jul 26, 2007

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Dennis my 1995 lincoln towncar JBL radio quit producing sound the system comes on fine but I get no sound could u help me please, what is the problem?


The Amp in the trunk might have blown,
Town Car Radio Wire Diagram
Car Radio Battery Constant 12v+ Wire: Pink/Light Blue
Car Radio Accessory Switched 12v+ Wire: Yellow/Black
Car Radio Ground Wire: Black/Light Green
Car Radio Illumination Wire: Light Blue/Red
Car Stereo Dimmer Wire: Blue/Red
Car Stereo Antenna Trigger Wire: Blue
Car Stereo Amplifier Location: Trunk
Car Audio Front Speakers Size: 5? x 7? Speakersir?t=modilife-20&l=as2&o=1&a=b00009uhre
Car Audio Front Speakers Location: Doors
Left Front Speaker Positive Wire (+): Orange/Light Green
Left Front Speaker Negative Wire (-): Light Blue/White
Right Front Speaker Positive Wire (+): White/Light Green
Right Front Speaker Negative Wire (-): Dark Green/Orange
Car Audio Rear Speakers Size: 6? x 9? Speakers[img src="http://www.assoc-amazon.com/e/ir?t=modilife-20&l=as2&o=1&a=B00009UHRE" width="1" height="1" border="0" alt="">
Car Audio Rear Speakers Location: Rear Deck
Left Rear Speaker Positive Wire (+): Gray/Light Blue
Left Rear Speaker Negative Wire (-): Tan/Yellow
Right Rear Speaker Positive Wire (+): Orange/Red
Right Rear Speaker Negative Wire (-): Brown/Pink
Check the fuses

24851106-prgqozi4aluuon54ixeydqz4-5-7.gif 24851106-prgqozi4aluuon54ixeydqz4-5-0_0.jpg

Jul 20, 2014 | 1995 Lincoln Town Car

1 Answer

Dennon gets hot shuts off


how are your four outside speakers hooked up? If you have four speakers hooked up to only two output channels on the receiver, the receiver is sensing a short and shutting down to avoid damage to the amp.

Jul 20, 2013 | Denon AVR-3806 Receiver

1 Answer

I have a JL total mobile audio T500.1 mono amp and it was playing then all the sudden it stopped and the power light which is usually green is now red and stays red and no sound comes from the subs any...


This happens when the amp goes into protection mode. 90% of the time, it means there is a short or has another issue inside the unit and has to be fixed or replaced. Hope this helps and good luck!

Jul 09, 2010 | Jl Audio Car Audio & Video

1 Answer

Red color turns green after 10 minutes of play. This happens with all my driving games including the new FORZA 3. In the begining it would take about 15 minutes to turn green and now it is only about 7 to...


Yes this is the GPU overheating you will get this and then it will go to freezing and then the red lights, you need to stop the heat build up you can do this yourself or you can send it in to get it fixed.

Jan 01, 2010 | Microsoft Xbox 360 Console

1 Answer

Amp works for a few minutes


too much power. turn your amp down a bit and let er rip.

Oct 01, 2009 | Sony Xplod 1100 Watt Max 10" Subwoofer,...

2 Answers

Jh202 amp works for a few minutes stops for a few minutes any ideas


Sounds like the amp is going into Protection Mode. Does yours have green LED light then RED LED on it? The green is power and the red is Protection. You will need to either change the OHMS wiring or Put A Fan on it to Keep it Cool Inside.

May 11, 2009 | MTX JackHammer JH202 Car Audio Amplifier

1 Answer

I need no color code for 2006 ford taurus


+12V DC Battery(Constant) Red/yellow - Control unit in left side of luggage compartment 17 20 amp Junction box in front center of engine compt.

Switched Accessory Red/orange - In-line with the starter relay 27 5 amp Junction box in front center of engine compt.

Ground Black/lt.green

Remote Turn On(output) Brown/orange Pin 8 of CD changer. Also light green/black between rear control unit (C388B-2) and front panel (pin 4).

Illumination See notes *

Left Front + Orange/lt.green

Left Front - Lt.blue/white

Right Front + White/lt.green

Right Front - Dk.green/orange

Left Rear + Grey/lt.blue

Left Rear - Tan/yellow

Right Rear + Orange/red

Right Rear - Brown/pink


Notes
Information listed in the harness section refers (in this case) to the rear control unit in left side of the luggage compartment.

* Illumination is controlled from the integrated control panel, thru dark blue/white at pin 2.

INTEGRATED CONTROL PANEL has white/red for battery input (pin 11), with fuse no. 33 of 15 amps in the junction box under left side of dash; black/pink for acc. power (pin 6), with fuse 22 of 15 amps in the junction box under left side of dash; red/yellow for hot in start or run (pins 5 & 16), with fuse no. 32 of 10 amps in the same location.

AUDIO connections between the integrated control panel (front) and the rear control unit (rear) are as follows:

R+ dark blue/white wire between pin 9 of front unit & pin C388B-7 of rear unit;

R- gray wire between pin 19 of front unit & pin C388B-20 of rear unit;

L+ brown/light green wire between pin 20 of front unit & pin C388B-6 of rear unit;

L- white/pink wire between pin 10 of front unit & pin C388B-19 of rear unit.



AUDIOPHILE SYSTEM has right and left tweeter speakers branching to right and left front speakers with the same colors.


Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

Apr 12, 2009 | Car Audio & Video

1 Answer

Protection Light Comes on


your amp isnt getting enough power to it you may need to install a compacitor unit

Mar 23, 2009 | Sony NTX-2136 DHD 2Channel Car Amplifier...

2 Answers

Radio wiring


The factory wiring connector hook-up for the Mustang is:

Radio / Power Connector:

Light Green / Yellow - Hot at all times (Fuse 8)
Yellow / Black - Hot in ACC or Run (Fuse 11)
Light Brown / Red - Goes to instrument panel dimming rheostat (Fuse 4)
Red - Ground
White / Purple - Hot in ACC or Run (Fuse 11)

Speaker Connector:

White / Light Green - (+) Right Instrument Panel & Door Speaker
Dark Green / Orange - (-) Right Instrument Panel & Door Speaker
Brown / Pink - (+) Right Rear Speaker
Pink / Light Brown - (-) Right Rear Speaker
Pink / Light Green - (+) Left Rear Speaker
Tan / Yellow - (-) Left Rear Speaker
Light Brown / White - (+) Left Instrument Panel & Door Speaker
Orange / Light Green - (-) Left Instrument Panel & Door Speaker

Your best bet is to buy a radio install kit and adapt it to the Mustang connector. Hope this information helps.

Oct 19, 2008 | 2002 Ford F250 Super Duty SuperCab

Not finding what you are looking for?
NAD C370 2-Channel Amplifier Logo

1,633 views

Ask a Question

Usually answered in minutes!

Top NAD Audio Players & Recorders Experts

The Knight
The Knight

Level 3 Expert

76573 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1189 Answers

Marvin
Marvin

Level 3 Expert

85239 Answers

Are you a NAD Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...