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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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  • The Master
  • 37,667 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

Cary Leonardt

  • 304 Answers

SOURCE: My tv keeps turning off and changing channels.

You have a bad Main bd.

Posted on Jul 17, 2009

pabloloco

Paul Sager

  • 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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1 Answer

Accidently had peaker connect to A side while in bridge mode wud mixer be damaged
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 !!!
If the powered mixer works in normal stereo, then it is probably OK.
If it then does Not work in bridge mode it is likely to be the connector wiring.
All the best.

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1 Answer

Mackie DL 1608-1 channel hums w only 1 guitar
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.

Dec 15, 2013 | Audio Players & Recorders

1 Answer

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...

Sep 24, 2011 | Behringer PMP6000 VP1520 PA Package

1 Answer

I have a turntable with a white and a red male RCA output cable. I am trying to hook it up to a Marathon DJ-1000 amp which has two TRS input channels - Channel 1 and Channel 2. Should I buy a twin female...
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.

Jan 25, 2011 | RCA Audio Players & Recorders

1 Answer

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!

Jun 21, 2010 | Adcom GFA-5802 2-Channel Amplifier

1 Answer

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.
After you have done that test, let me know.

Oct 26, 2009 | Adcom GFA-5400 2-Channel Amplifier

1 Answer

No stereo signal out from yamaha p 2500 s
It's unclear what type of connectors are on the end of the cables(s) coming from your computer.

This amp only works with mono 1/4" TRS and XLR connectors, not standard RCA connectors.

Did you try the Right one in the Left Channel to see if the Left Channel worked?

Refer to the following manual and read up on the connectors (page 7) and the use of the Stereo/Parallel/Bridge Switch (page 8). When it is NOT in Stereo Mode the unit only uses the Right Channel controls and input.

http://img3.musiciansfriend.com/dbase/pdf/man/m_480824.pdf

STEREO/PARALLEL/BRIDGE switch
 Use this switch to select the operating mode.
• STEREO mode
Channels A and B operate independently (as with a conventional
stereo amplifier). The Channel A input goes to the Channel
A output jacks, and the Channel B input goes to the
Channel B output jacks.
• PARALLEL mode
The Channel A input signal is output through both the Channel
A and Channel B output jacks. The Channel B input jacks do
not function. Channel A and B volumes can be independently
adjusted.
• BRIDGE mode
The Channel A input signal is output from the BRIDGE output
jacks. To adjust the volume, you must use the Channel A volume
control knob.

Apr 03, 2009 | Yamaha P-2500 Amplifier

1 Answer

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!

Dec 31, 2007 | Audio Players & Recorders

1 Answer

Earthquake phd 1 channel and 2 channel
check for broken rca input ground

Mar 10, 2007 | Earthquake Sound PH-D3 Car Audio Amplifier

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