Question about NAD C320 2-Channel Amplifier

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23HCV87 DVD problems

Unit will not olay BVB disks. Unit will accept disks, and load them but will not play. Unit has played well untill recently.

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Re: 23HCV87 DVD problems

May be dirty lens get a cleaning disc for cd player and insert to clean then try player again. If you can take cover off insert disc see if disc spins,if not spinning you need a motor drive.

Posted on Dec 01, 2007

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Why do I get buzzing each time I increase the volume on my hi -fi?

What type of set up do you have old zenith that was a turn table,radio in a cabinet or independent units, such as separate receiver, tape/CD /DVD Playing Recording unit? Also check connections in back of speakers (if they are separate from unit. It can be a number of things from bad Volume pot to a "magnetic' device to close to speaker system,to a bare connection to accidentally shorting against another connection. Check all your connections first. Hope this helps, Best Regards,Steve

Feb 11, 2012 | Amplifiers & Preamps

1 Answer

I have an Onkyo A-7055 amd want to hook up two speakers. Looks like a dozen connectors in the back of the unit... which ones to use. If I experiment is there a chance I could blow out the unit?

Do you mean you want to connect 2 pairs of speakers, or just 2 speakers like you say in your question? There are 4 pairs of screws on the back of your amplifier on the upper right side of the rear panel near the fuse cap and the AC outlets. Each pair of screws will be connected to one speaker. Your Onkyo can be connected to 4 speakers. If you want to connect only 2 speakers, use the screws labeled "SPEAKER A" and connect the speakers to the left and right channels, and make sure you connect the + speaker wire to the screw with the red marking around it. Connect your other speakers the same way, one speaker per pair of screws.

Nov 15, 2010 | Onkyo Amplifiers & Preamps

1 Answer

Recently, after about an hour of play, when my Adcom GTP-760 is warm, a low level hum begins and can be heard on all channels regardles of the source selected. The hum cannot be heard when the unit is...

The filter capacitors are probably going bad is the likely cause.

It may also be bypass capacitor in the preamp section.

Noting whether the hum volume varies with the setting of the volume control would aid troubleshooters.

One might be able to isolate the bad component with freeze mist/circuit cooler.

Apr 21, 2010 | Adcom GTP-760 Amplifier

1 Answer

Technic problem

well you need to go your local electronics store, to a spare or need to replace the tuner unit, and need to be repaired.

Jan 09, 2010 | Amplifiers & Preamps

1 Answer

I have a Teac a-R600 integrated amp. The muting light strarts to flash after about an hour playing and mutes the sound until unit is switched off and re started. Any ideas . Thanks Ian


Dec 19, 2009 | Amplifiers & Preamps

1 Answer

Amp Turns off after 30 seconds of song play

Since the unit recovers once it has powered down. I suspect that the internal protection circuit is kicking in. Check the wiring and be sure that there are no crossed wires anywhere. These amps are designed to work with 2 ohm loads and can take a direct short for a short period of time. If the wires appear ok, measure the speakers with an ohm meter. If the speakers are 4 ohm rated, they should measure just under 3 ohms with the meter, If they measure less than 2 ohms, there is a problem with the speakers.

Also, does the amp shutdown regardless of the volume level or just when played loud?


Apr 15, 2009 | Kenwood 1000W Class D Bridgeable Mono...

2 Answers

My Cambridge azur 540C compact disc player won't read CDs.


After about 100 CD-DVD units, I've found that most problems are from debris/film on the laser lens.
If taking the cover off the unit doesnt scare you, unplug it and blow out the CD assembly with a can of compressed CO2
and VERY lightly clean the laser lens with 91% or better alcohol on a cotton swab.
If that doesnt work , contact Cambridge Audio for a repair service.

Jan 02, 2009 | Cambridge Audio Azur 640P Amplifier

1 Answer

Yamaha DSP A-1000 input selector switch not working properly

i did not post that....and why would fixya be asking the poster of a problem for a solution?????
Bug? Pls delete these posts moderator.

Mar 09, 2008 | Amplifiers & Preamps

1 Answer

Yamaha HTR-5170 amplifier shutting off & not powering up

I agree with Jango. Go back to the setup when it last worked. If adding the DLP is the problem, you may have some sort of a ground loop formed between the TV and the receiver. good luck...Rob

Mar 02, 2008 | Amplifiers & Preamps

5 Answers

Yamaha DSP A-1000 input selector switch not working properly

As that unit is well over 5+ years old, I seriously doubt the part is available any longer. I doubt that you will even find a used part, and even if you do, it will probably be as bad as your switch. As I have worked on audio for over40 years, I would use LPS 2. It is a lubricant. Do not try this with WD40 or similar. Just spray the LPS on the wafers, or through any open holes in the switch. You just need a little. If you just squeeze the button, you will see just a little bit of foam. That is all you need. No more; no less. Rotate the switch from from left to right and back again multiple times. Try that. BTW, no manufacture uses these mechanical switches any more.The controls are now called Rotary Encoders, which basically are inputs to a display microprocessor IC(a computer within the new product) which in turn controls the inputs of a switching IC. It's the same as your old switch, just electronic, and much more complicated. If you need more information, or would like to inquire about repairing your unit, please visit my website at You may contact me there. Thank you.

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