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.
If you are talking about a phono preamp, take the output rca cables from the turntable, "red and white" plug it into the preamp input, "labled" next take a red and white cable wire male ends, "3 to 6" feet long, and plug the one end in the output of the preamp, "labled" and finally plug the remainder into the AUX input of the Marantz receiver matching the colour codes so the left and right channels don't get mixed up, you now should be good to go.
It is possible that while you cleaned the top with a damp cloth , some drops of water could have fallen on the board and shorted. If so it is possible that the amplifier had encountered a fault with a higher current drain which had triggered it to a protection fault condition. The fault can be your output drivers- the MOSFETS/IC's fitted for both the channels, Use a meter after disconnecting to check for short in the drivers. Disconnect the positive and negative voltages to the output and see if the protect changes. Even a fault in the preamp stages that drives in high current into the output can shut the Amplifier. Sometimes this can be a noise like a HUM or HISS before the protect works. Faulty capacitors in these circuits also can cause similar issuesand needs close observation. You need to confirm and replace the specific stages or outputs. If not there can be issues in the mother board, maybe the protect circuit by itself is shutting off due to a faulty bias , maybe a leak in any voltage/current sensing circuit. Also disconnect the speakers and test, if the protect is off then check for short on the speakers.
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..
The X792 has 3 pairs of preamp outputs, so you can directly connect a 4-channel amp and a monoblock amp for subwoofers directly to the receiver. If you need additional amps connected, you can use RCA "Y" cables to split the signals. Also some amps may have preamp outputs that allows you to "daisy chain" more than one amp to the same set of outputs from the head unit.
Yes, sounds like your DSP chip has an issue. Not an inexpensive repair if that's the culpret. Around 400-500 to replace the chip. It's an awesome receiver and worth 300-400 in repair, however, a 3800 or 1800 can be had for 600-800 depending where you look. If you need more help, post a comment and I can help you some more.
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!
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.