I receive a radio channel in one of the outputs of the preamp
After a brought the preamp, I noticed that from the second output I receive not only the good signal from the microphone, but also a bad signal of about -70dB: a radio channel. I would prefer noise instead of radio, because it's more tolerable.
Although I catch a radio channel in my apartment with it, when I changed the preamp location, going to the warranty service, there the engineers couldn't hear any radio, so that they could not fix my preamp, because in their opinion it worked perfectly.
What can I do?
Re: I receive a radio channel in one of the outputs of...
I would use sheilded wire on the mic with the least amount of cable. You can relocate the pre amp with aluminum foil wrapped around the pre amp. also turn the gain on the mic down as to eliminate any interference from your strong radio station nearby.
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The fault is on the tuner section of the receiver. FM radio signals are processed by one IC in the tuner section. Since you can hear the station, it won't be that one. The only other is the Stereo Decoder. The radio signals are passed to this and that splits the signal into the left and right channels. If you can't here one of the channels then the Decoder IC will have failed. If you are lucky the board will label the IC, otherwise find the tuner section (look for coils). Then read the numbers of the IC's. If there are several enter each number into Google and find what it does. If you find one that says "decoder" or "FM multiplex" that is the one you need to replace.
You probably want to connect the av Audio output from your tv and connect to the RX-V5000. The audio that you are getting from Radio through the tv is probably coming from the output of the RX-V5000 coming to your tv, to which the desiredd route is the other way.
The Outputs at the back should be labeled to tell you which channels are inputs or outputs.
You should hear 2 clicks..one when you first turn the unit on, and a second one about 5-20 seconds later. I'm going to guess you don't hear the second click, which means that your NAD has DC Offset, meaning a damaged amplifier.
Unfortunately can't connect it that way. The pre out is only meant to go directly into an amplifier that has all of the same inputs (front/rear, center and surround), not a standard receiver. (Pre amp to amp only, not pre amp to receiver) If your Onkyo doesn't have all the same inputs as your Kenwood preamp has outputs you will just use your standard left/right outputs from the Kenwood to your Onkyo input (CD, Tape, Phono,DVD etc) then use the outputs (front/rear, center and surround) from your Onkyo receiver and connect directly to your speakers..
if you're using the receiver as a preamp, you'll need a low level output on the receiver which tracks with the volume control on the receiver. Some receivers have "preamp out" jacks which are tracked with the volume control on your receiver. This is what you're supposed to use. However, if you don't have this feature, you can use the headphone jack on your receiver. This is what I do with my amp and it works great!
The first click is the power relay connecting up the main transformer, the second click you normally hear is the speaker protection relay. When a fault condition is present in the amp, the protection circuit prevents the speakers connecting to the amp by NOT operating the relay. As the unit "settles" and works after the delay you noticed, what ever issue the amp is balancing itself it. It sounds like a leaky capacitor in transistor in the output stages. This can often be located with quick bursts of freeze coolant spray. It may also be a dry joint in the soldering about the driver and output transistors, always pays to have a visual look at it whilst you are in there. I also check power regulator stages for dry joints. The fault will be on one channel if it is signal path related, and both channels if power supply related. If you are familiar with electronic repairs, get in and have a look yourself. If not, get a NAD service guy to take a look at it for you. Good luck. Feel free to ask me any questions you may have about it.
Feed the amp with the left channel preamp to the right channel input on amp and check output.
If you get output from amp then pre amp nedds to be checked out if still no output then amp is suspect.