Question about Onkyo TX-SR502 Receiver

1 Answer

Standby light on

The manual says that when this light comes on it means I have activated the units overload protection. I had volume on 55 or so when it shut down and it was pretty warm. Can this be repaired by a mechanical minded person who is not well versed in electric issues?

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  • Onkyo Master
  • 1,054 Answers

You might have shorted out one of the amp channels. If this is the case, it needs to be looked at by a pro.

Posted on May 03, 2013

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Posted on Jan 02, 2017

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SOURCE: PROTECT Mode issue

Well let us start here ok one of my speakers blew the woofer blew out on my infinity speaker on the right side. Your amp will protect itself from being overloaded on one side of the power amp. This is what happened to me. So you should check your connections also this may also pose a problem. Make sure your speakers got 4 ohm or 8 ohm speakers switch dialed correctly on the rear of your power amp. check your ohm rating on your speakers also with a volt meter on your ohm setting which is very important which can damage your power amp if it is set wrong. You all have a great holliday season hope this helps.

Posted on Dec 15, 2007

  • 4234 Answers

SOURCE: Onkyo TX-DS838 Issues

The problem here is that the output amplifier section has a problem. This is detected internally and the system shuts down in a "protect" mode. The output section really only kicks in when you attempt to bring up the volume. Another possibility is a problem in the "front end" where DC current is being passed to the amp section. Without takeing measurements, it is difficult to determine the exact cause. This should be a relatively stright-forward repair for a service shop and should cost about $20-$40 in parts plus the local labor charge.
Dan

Posted on Mar 17, 2008

dunnbiker
  • 8546 Answers

SOURCE: TX DS838 WHEN TURNINGVOLUME DOWN UNIT MAKES A POP SOUND

Sight unseen my money says the new problem is a direct result of the 'repair' to the channels that are giving you problems now. You didn't elaborate on what it was you were trying to fix in the first place. Backtrack your steps and undo what you can to see if the bug changes.

Posted on Apr 30, 2009

smarthome2
  • 1114 Answers

SOURCE: I turn my Onkyo TX-SR600 receiver on. After a few

The most common problem found on FixYa for Audio Video2_bing.gif Receiver's is:

My receiver say's "Protect" or turns on then off. What's wrong? Seven times out of ten it is a shorted speaker or speaker wire2_bing.gif. To determine your exact problem, the first step is to disconnect all speaker wires "at your receiver" Next: Turn the receiver back on. If your receiver still says "protect" or turns off, it needs to be serviced. If your receiver stays on; reconnect your speakers one at a time and power back up after each speaker. You may find that after reconnecting all speaker wires it works! Most commonly the small braids of wire from the + to the - have touched and have caused the problem. In some instances, you noticed the problem only when turning the volume up. either way, make sure the exposed wires to your receiver are no longer than 1/2" long and are completely under the screw down terminal or slide in. When you've found the wire or speaker with the problem, your receiver will go back into "protect" At this point, disconnect the wire from the speaker at the speaker that may be causing the problem then test again.* Note* Make sure speaker wires do Not touch each other as this Will cause a short! If you turn the receiver back on and it stays on, you now know the problem is in your speaker itself. To test your speaker, you will need a multimeter. Set it to ohms resistance and touch the speaker terminals, if there is a short internally the meter will read "1......" If it's an analog meter, it will peg to the right. There's your problem. Now, within any speaker there are quite a few possibilities as to what could be causing the problem. Most common is a blown coil and the speaker needs to be replaced. Some speakers have internal crossovers (usually floor standing speakers2_bing.gif) and may have a shorted or burnt board (usually very visible brown burn marks on the board) and can possibly be repaired if your handy with a soldering iron. Now, if you disconnect the speaker wire at the speaker and it still says "protect" Check your wire for the obvious cut or nail thru the wire if possible. If your system has wiring that runs behind walls, you may need to use your meter again. Disconnect the wire at both ends, keep the ends separated, put your meter on ohms resistance and touch probes to the + and - wires at one side. If the meter pegs to the right or reads "1...." the wire is shorted and needs to be replaced or repaired at the short. Hope this helps.

Posted on Apr 11, 2010

  • 6771 Answers

SOURCE: Have Onkyo TX-NR808 receiver. Not

The problem is the audio output ic's, one or more channels has developed a short causing the safety shutdown to engage. The only solution is take it back where it was purchased and since it is under warranty it should be repaired free of charge if not a possible exchange.

Posted on Jan 09, 2011

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1 Answer

My onkyo HT RC330 will not power up at all. Have had problems past couple of months with starting it but if you played around with swith it would start. Now nothing.


Try resetting the AV receiver To reset the AV receiver to its factory defaults, turn it on and, while holding down VCR/DVR, press 8 ON/STANDBY. "Clear" will appear on the display and the AV receiver will enter Standby mode.

It is possible that the protection circuitry has been activated. Remove the power cord from the wall.. Disconnect all speaker cables and input sources, and then leave the AV receiver with its power cord disconnected for 1 hour. After that, reconnect only the power cord and set the volume to maximum. If the AV receiver stays on, set then 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 dealer.

If the standby light is lit it and the unit will not boot it is most likely that the protection circuit has been activated. If there is no standby light then check the fuses. These units check that the power supplies are operating near specification. If a capacitor or resistor in the circuit, or a broken solder connection the unit will shut down. Because of the temperature the thermal cycling around the power supplies a broken solder joint can occur. This will make for an intermittent operation.

Hope this helps.
26289825-owoa52fq3dbvw0lom3ojbzgr-3-0.jpg Failed resistor or capacitor


26289825-owoa52fq3dbvw0lom3ojbzgr-3-2.jpg

26289825-owoa52fq3dbvw0lom3ojbzgr-3-5.jpg

Sep 23, 2016 | Onkyo Ht-rc330 5.1-channel Home Theater...

1 Answer

Yamaha 2400IS Generator goes to overload when ie: 240 volt plugged in, or 700 watt angle grinder plugged in.


No idea but somebody else will probably come along with a better idea then mine, seems a lot of these generators have this thing installed on them (Has $25 hard start kit). Not sure what it does or how it works. Strangely enough you said you use it for 240 volt. Looked at the picture and didn't see a 240 volt connection.
If you are using the what look like the 120 volt circuits you can't over load the unit. Maximum current draw will cause it to go into protection mode and shut down the power load. The following is an exert from the owners manual which I got from Yamaha's site. Link at the end of this post.

Hope this helps


-
16
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q
760-029
AE00788
Overload indicator light
The overload indicator light
1
comes on when an over-
load of a connected electrical device is detected, the
inverter control unit overheats, or the AC output voltage
rises. The electronic breaker will then activate, stopping
power generation in order to protect the generator and
any connected electric devices. The AC pilot light
(green) will go off and the overload indicator light (red)
will stay on, but the engine will not stop running.
When the overload indicator light comes on and power
generation stops, proceed as follows:
1. Turn off any connected electric devices and stop
the engine.
2. Reduce the total wattage of connected electric
devices within the application range.
3. Check for blockages in the cooling air inlet and
around the control unit. If any blockages are found,
remove.
4. After checking, restart the engine.
http://www.yamahamotorsports.com/assets/service/manuals/0/LIT-19626-01-23_1423.pdf

Jun 06, 2016 | Yamaha EF2400iS Portable Generator

1 Answer

What if went in safety mode, safety mode is froze in screen. Won't do anything


"Safety" mode - literally? I don't see that anywhere in the manual.

Page 13

Speaker Connection Precautions

(North American and Taiwan models) You can connect speakers with an impedance of between 6 and 16 ohms. If you use speakers with a lower impedance, and use the amplifier at high volume levels for a long period of time, the built-in amp protection circuit may be activated.

Page 66

The STANDBY indicator flashes red


The 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.

Generally speaking, an amp protects itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.


Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.


You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.


If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.


If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Apr 04, 2011 | Onkyo TX-SR608 Receiver

1 Answer

Power button light keeps flashing and sound gos my marantz sr4001b


Register and download the manual for free at retrevo.com


http://www.retrevo.com/s/Marantz-SR4001-Receivers-review-manual/id/511ag801/t/1-2/


Page 48: See the note at the lower right.


After "PROTECT" appears on the unit's display, the standby indicator may start flashing. if it does, there is a problem in the unit or the connection. If this problem reoccurs even when power is activated from the remote control unit, call for servicing.


Generally speaking, an amp protects itself from heat, shorts and overloads by refusing to turn on or stay on.


Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.


You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.


If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.


If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.


Check for loose speaker connections as a root cause for intermittent shutdown.


Feb 21, 2011 | Marantz SR4001

1 Answer

Onkyo tx sr605 stopped playing music what should i do


If the receiver is indicating "overload" or "protect" there is a load on the system. Turn the receiver off and remove all speakers and wires, turn receiver on and reduce the volume right down, if the word "overload or protect" stays off! it means there is a short in the wiring or one of the speakers. If however the word "overload or protect" comes on when turned on, it indicates a short in one or more of the audio output ic's in your receiver, this is where you will need a tv technician to troubleshoot further. If you not sure about checking it out just call a professional in to have the unit assessed.

Jan 27, 2011 | Onkyo TX-SR605 Receiver

1 Answer

Unit turns on for 2 seconds then goes off, standby light remains however


The Amplifier Has A short. Do you play at high volumes or may your speaker wires have crossed for a second or two or maybe hooked up or disconected while unit was on. Probably just needs a fuse unless circuts burnt before overload protection engaged!

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After turning ON the power/standby switch, the unit(receiver) display comes ON (green light) then after approx.4-5 seconds the display goes OFF and the unit defaults back to the standby mode (red light). I...


Is the red light flashing at first?
The unit may be going into protect mode. Lets hope it has done the job and the receiver has protected itself from failure.
Protect mode can result from speaker wires touching each other or the Amps2_bing.gif metal case. Check that first.
It can also be caused by unstable ohm loads if too many speakers2_bing.gif are connected to any of the outputs especially zone 2.
If you can remove all speaker wires and turn the unit back on. If it stays on, turn the volume down on the main zone and zone 2 if connected. Then reconnect speaker wires.

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try this mate:
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Speaker wire contact with each other is the problem. Check the back of ALL SIX speakers including sub-woofer. You should find wires contacting each other. Fix that and your problem will be solved.

Barry Scholles
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