Question about Sherwood RD-8108 6.1 Channels Receiver

1 Answer

I am not getting sound from my receiver from any source. The unit powers up. I think it might be the speaker protection relay but am not sure. The "digital" indicator light on the receiver is flashing. When the receiver is working properly, that light only flashes when the receiver isn't picking up a signal: i.e. source is coming through optical 1 and receiver is set on optical 2. Any ideas? If it is a relay, how difficult are they to replace? Where can I purchase one from?

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You should check the speaker wiring to be absolutely sure the wiring is correct. If the wiring is correct you should power down the receiver and completely disconnect ALL the speaker wires. Then turn the receiver ON, without any speakers connected, to see if the receiver flashes.
If it does not flash then there could be damage internally. If it remains on (this is usually a good sign) turn the volume up to about half way and connect one speaker at a time until the receiver flashes. You can single out which speaker is causing the problem at which point you should repair or replace the problem speaker/speaker wire.
Thanks. Keep updated for any more query. You can rate this solution and show your appreciation.

Posted on Aug 06, 2010

  • sarapio Aug 06, 2010

    I disconnected all speakers from the receiver while in was powered down. I turned the power back on and still am not getting the speaker protection relay to connect or "click". What do you think the issue could be? A bad relay?

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Can you help with in-depth technical troubleshooting as the service manual does not go into detail.


Doubt that it is either of the STK's. If they are bad, then you would get a DC protect error and the unit would shut off. Most likely problem is either your digital board is bad or the volume control IC on the bottom of the main board.

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My teac ag-v1200 audio/visual receiver isn't


check speaker connections - unit might be going into protection

Sep 03, 2014 | Audio Players & Recorders

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Denon AVR 883 no sound from any source including zone 2 speakers


This sounds like a thermal issue, meaning after the receiver has been on for a while it gets to warm and then fails. I suspect after 8 years the unit may have accumulated some dust that is not allowing the heat sinks to dissipate heat adequately. I would use compressed air and blow the unit out. Some computer stores have blow stuff in a can that work well. If you have and air compressor, dial it back to 10 psi or so. You will be amazed at how much dust will come out of that unit so you may want to unhook the unit and take it outside. Also be careful not to stack anything on top of your receiver. Make sure there are lots of openings around the unit. High temperatures kill electronics.
Hope this helps.

Apr 03, 2010 | Denon AVR-883 Receiver

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When push the power button, I can hear a relay click but the unit will not power up. I took the cover off and fuses are good. Can't find anything in the trouble shooting section of the manual. What do you...


When the unit functions correctly, you should hear 2 clicks. The first is the power relay that "starts" the unit. The second is the speaker protection relay that will kick in the speaker connection. If you do not hear the second click, the unit is in protect mode. This means that a problem was detected in the amp section and the unit is prevented from connecting the speakers. This is done to prevent further damage. Typically the output transistors fail and cause this. Expect a parts cost in the $25-$50 range for this repair.

Dan

Sep 30, 2009 | Yamaha RX-V1500 Receiver

1 Answer

I have a pioneer receiver..vs 812....and sound has ceased to come out of it. It comes on....and switches between sources...but there is no signal coming from ANY source


First make sure the speaker A/B switch is on.
If still no sound, dissconect ALL speakers from the rear of amp.
Now turn on amp and listen for the relays to click in.
One relay will click when you press power. A couple of seconds later, the speaker relay will click in.
If it does, you could have blown outputs, bad speaker wiring, faulty speakers.
If it does not, the speaker relay may be faulty.
Hope this helps.

Sep 12, 2009 | Pioneer VSX-D812 Receiver

1 Answer

No sound listening to music and audio stopped


Tape monitor is it on? Muting? How old is this unit? Does speaker relay click on secoinds after unit powers on? If relay does not click probably output problem. Try disconnecting speaker wires to see if relay will click. If it does click the suspect bad wire or speaker if not bad amp. The first step to diag is to diconnect everything and simplify the citems needed to get sound. 1 Known good signal source and cable, Minimum affects, check speaker switch, Known good wire and 1 speaker to front l or r terminal. iIf still know sound seek serv.

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2 Answers

Intermitting sound problems on Onkyo SR-705


Does it only happen when its being stressed (played really loud)? Is it hot? If so, is it well ventilated and away from other heat sources?

Somewhere in here is the answer.


"The AV receiver turns off as soon as it’s turned
on
• The amp protection circuit has been activated.
Remove the power cord from the wall outlet immediately.
Disconnect all speaker cables and input sources,
and leave the AV receiver with its power cord disconnected
for 1 hour. After that, reconnect the power cord
and set the volume to maximum. If the AV receiver
stays on, set the volume to minimum, disconnect the
power cord, and reconnect your speakers and input
sources. If the AV receiver turns off when you set the
volume to maximum, disconnect the power cord, and
contact your Onkyo dealer."

That last sentence is misleading. I don't think they actually want you to play an active signal at MAXimum as a test. I think they mean with all sources attached and an idle one selected, like CD, crank the volume knob. If the amp is not in Protection mode you should always be able to detect some hiss up close.

For another thing, if it shuts down only with speakers attached the problem could be outbound at one or more of the speakers. I would isolate that piece somewhat before throwing my hands up and calling Onkyo. Make sure that the speaker cables are not shorting. Disconnect certain speakers and try it again until you figure out which one(s) are involved. Then it could be the speakers.

Apr 16, 2009 | Onkyo TX-SR705 Receiver

1 Answer

MPA-101 Amplifier powers on, receives source signal, the fuse is not blown inside, but no sound comes out of the amplifier. The amp is pretty new, doesn't even have dust inside the unit.


Hello, is this a Radio Shack PA amp or Jamo amp? The unit is probably in "Protect" mode. Is this a PA system or a receiver...receivers have a protection circuit that will not let the speaker relay activate if the amplifier output section is shorted and sending voltage towards the speakers...so they won't fry!!The speaker relay should activate within 3 to 5 seconds if your output section is ok.

barneyluc

Oct 13, 2008 | Audio Players & Recorders

1 Answer

Denon DRA-25/25L Stereo Receiver. On power up the display lights but no sound is produced by the unit. When working normally a click (relay?) is heard about 5secs after power up and normal speaker output...


Without looking at the schematics for this particular model, I'd surmise that the click is indeed a speaker protection relay. Generally this is fed by a number of different sense circuits that watch for power amp issues and/or excess speaker current and/or power supply output stability. Although the relays do indeed fail at times, generally it is not the relay that is at fault. If you have a scope and a schematic, you can check the various circuits that feed the relay for the exact cause. If not, you can do some experiments that might help deduce the problem: e.g. do headphones work when speakers do not, does the relay click on when no speakers are connected (or selected), etc. In my experience, it is most often the output transistor(s) in the power amp. But not always ;-)

Apr 15, 2008 | Denon Audio Players & Recorders

1 Answer

Onkyo receiver


It sure dosent sound good!! The clicking sound you here are the protection relays to assist in protecting your speakers from blowing out. Your output devices are shorted it sounds like. Do not ever ever attemp to jump out those relays as it will burn out your speakers and possibly burn down your house!. Theres alot of current inthese amps for high power so if your not a tech and you think its worth it take the unit in to be looked at as there are no serviceable user parts inside these units . Sorry to have to tell ya this.. Good Luck

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