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I've ruled out both inputs Channel 1 and channel 2 in both inputs after about 10 minutes stop working and it goes to humming what's the next step

Posted by John William Thomas on

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ADMIN Andrew

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  • The Master
  • 49,870 Answers

This is a follow-up to your other post. This doesn't not work because posts aren't threaded by user. Therefore, this post has no relevance to the other. You can go back to your other post, click EDIT and add this bit back in with copy and paste and then Delete this one. Or I can Edit it in.

Posted on Feb 28, 2021

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5 Related Answers

Anonymous

  • 17 Answers

SOURCE: Kenwood Receiver KR-V127R - left channel not working

Select an input that is not connected, for example select CD with no cables going to the CD input on the backside. Will you then hear equal humming on both channels? If so, the amp stage is ok,
and the problem lies in the signal level circuitry.
Open the cover and use a plastic (insulated) stick to touch suspectible cables and components. When the sound returns, you've found the cause. Resolder or reseat the component/cable/card.
Use the insulated stick, NOT your fingers!

Posted on Jan 01, 2008

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Anonymous

  • 33 Answers

SOURCE: No channels?

Try going into the setup menu and make sure the ANT input is set to cable. Then look for Auto Program or Channel Setup and let it scan and find all the channels it can receive. After it's done you should be able to go up and down through the channels.

Posted on Feb 16, 2008

Anonymous

  • 3 Answers

SOURCE: RCR460 with Emerson Tv doesnt change channel to input sources

found the answer but it doesnt help.......i got the number to who makes RCA remote controls and called them and talked to tech support to see what i could do for this problem. According to them, some universal remotes are compatible with most tvs but sometimes the remote can only give you the basic functions (chan up/down, volume up/down, #'s, mute an so on.) i dont really understand why it wouldnt work for the input channel but i do know i have a lower end and low priced tv. so....just like everything else the more you pay...the better it is. I checked the remote on my other tv in the living room and everything works just fine, even the input button. Hope this helps...

Posted on Mar 17, 2008

Anonymous

  • 304 Answers

SOURCE: My tv keeps turning off and changing channels.

You have a bad Main bd.

Posted on Jul 17, 2009

Anonymous

  • 2335 Answers

SOURCE: SAMASUNG 32 INCH TV FROZEN ON DTV CHANNEL 1

These are the steps to reset the DTV features and unfreeze your TV:

  1. Ensure the tv is in analogue mode, not dtv and turn it off.
  2. With the remote: press info, then menu, then mute, then power. These buttons need to be pressed sequentially, not all at the same time, and in quick succession. A menu will appear on the tv.
  3. Navigate to the reset option and press the left arrow key on the remote (or press the enter/ok button). The tv will reset itself and turn off.
  4. Turn the tv back on & it'll re tune all its channels. DTV should be working again.
I hope that helps.

Posted on Dec 26, 2009

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Hi, When an two channel (stereo) amplifier is connected in bridge mode the polarity of one channel is reversed, for this example say channel B. An identical (mono) signal is applied to both channel inputs.
The output is now connected between the two channel +ve outputs. As channel A's output goes +ve , channel B's output goes -ve, thus doubling the output voltage.
On this Behringer powered mixer, the bridge switch simply connects the power amp section inputs, the required way.
The bridged output is wired to the B output between pins 1+ and 2+ of the 4 pole Speakon connector. (Because usually pins 1+ and 1- are used, stereo operation is unaffected.)
So.... If you connect a speaker from the A output alone then I would expect it to work, BUT if there is already a speaker connected from the bridge output, then what happens will depend on the amplifier design.
At best the A channel will see too smaller impedance, and hopefully shutdown.
This is a Behringer, it has digital (class D) power amps, and it does Not claim any amplifier protection !!!
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Generally the hum is one of two things. If a sensor, pickup, per-amp, or mini-amp are too close to the receiver or speaker, Feed-back may occur or a hum and buzz join the audio signal out. The usual problem is: line in port on the instrument can be defective or the male jack is not making proper contact. If a cord is tested and working, the condition is in the input on the instrument. If a terminal has a loose wire inside the instrument the problem can be intermittent ( come and go) and thus a buzz or line noise may be present.
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I have a Behringer PMP 6000 powered mixer. Channels 4 & 5 yellow overload light is constantly lit. No sound from either channel (just a faint hum when volume slider approaches max level...

There are NO "yellow" overload LED's period. The clip or overload RED LED's are just above the PFL buttons for selecting a solo channel. There are "yellow" signal received lights (level set) up near the trim controls. In normal operation these will light when signal is received. Here is schematic for the PMP5000 which is really identical for the 6000.
http://elektrotanya.com/behringer_europower-p0569_hca2400_sps1000_dpx_pmp-1280s_5000_sch.pdf/download.html This has part of the DSP and PS and the PA circuits.
Scroll down to "get manual" and click on it to download. Ignore other download links on the page.
Try turning off the Phantom power if it might be on... If that stops the hum, something is the matter with the bypasses feeding Phantom power to those channels... Possible problem might be shorting of one of the coupling caps at the preamp input. The PMH5000 drawings are more accurate at the input circuits. You will note that the level set LED's are the yellows, and the clip/PFL LED's are the red ones. I suspect that RF bypass caps such as C110 or C121 (example typical for channel one) might be shorted. This makes noise on the Phantom power line unbalanced and will get into the channel where one of these caps is shorted. Do a test: Plug a shorting jack that shorts the tip to the sleeve intot he inssert for the channel. With the LOW CUT button up, observe is the level set LED for that channel dims or goes out. If it does, then I supect you have a shorted RF bypass cap at the input..The next test involves driving a KNOWN balanced signal into the XLR jack and using a TRS in tthe inout 1/4 inch, test the levels with an oscilloscope to verify the hot and the return have equal amplitudes. I they don't, congratualtions you have to tear the main board out... lots of knobs and screws to access the inout circuits and verifuy the cause... it could ALSO be a bad transistor in the inout pair, etc...
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If I understand you correctly each channel has a single input in the amp, then yes! white goes into channel 1 and the red plug goes to channel 2 this way your signal will be stronger which translates into louder sound.
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Humming when no input in jack; works fine with rca inserted; worries me that somethings is not right even though works fine with RCA or XLR plugged in, right channel only

Sounds like it could be feedback hum. Is there anything near it that could cause a reaction when unpluged? Such as a turntable, cassette etc. If so move them and see if it goes away. Even then it won't hurt the amp. I think otherwise worry when there's a hum when they are plugged in. PS check any earth connections too!
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I just purchased a GFA 5400 Amp and only 1 channel is working - Seller claims it worked when he Shipped. Is there a way to test the channel that doesn't work? Right Channel works Great!

Can I assume that you have input signals going to both channels and that you have SWITCHED the cables to make sure that both cables going to the power amp are actually sending signals to it?
That will rule out any cable / pre-amp problems.
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Kenwood Receiver KR-V127R - left channel not working

Select an input that is not connected, for example select CD with no cables going to the CD input on the backside. Will you then hear equal humming on both channels? If so, the amp stage is ok,
and the problem lies in the signal level circuitry.
Open the cover and use a plastic (insulated) stick to touch suspectible cables and components. When the sound returns, you've found the cause. Resolder or reseat the component/cable/card.
Use the insulated stick, NOT your fingers!
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Virtually new CV XD5's suddenly lost the right channel. Any help is appreciated!!! By virtually new I mean that this pair were the last unboxed pair I could find anywhere. Loved the performance so much, I gave my last pair to our son who also edits video. Anyway, they have less than 100 hours on them since purchase. Fix it history so far and unfortunately I don't have a manual: 1 Cables visually appear OK and I'd just replace this, yet I can't find this funky cable system anywhere. Any clues? 2 Everything in the right speaker appears solid and tight. 3 Left speaker driver appeared to have a loose solder connection behind the left to right cable connection. These were all carefully re-soldered. 4 Still no right speaker. Left speaker plays both left and right channels. 5 I have attempted other devices, to no avail. I'm guessing crossover or fuse at this point but without a manual, I haven't a clue where to begin form here. Can anyone help please??? Thanks ahead, RS ... Well, I solved and fixed the problem and wanted to share it here with you. Actually, I wished to "answer" it, but I see that's not allowed when you've solved your own problems. Regardless and in a nutshell, after checking all the internal components for anomalies and finding none, I took a gamble on extending the contacts that I had repaired in the first place. I did so by reheating the solder while applying pressure to the contact to drive it closer to the receiver/male contact of the wonderfully inept crossover cable. This worked! ...And oh yeah, as I had assumed, this system does not need or utilize fuses. Also, should anyone have any clue on this crossover cable system and what it is, please let me know. If I've got the info I'll build my own. Cerwin Vega only supplies a 6' crossover. Ridiculous! The monitors in my editing bay stretch wider than that!

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