Question about Yamaha HTR-5650 Receiver

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Receiver shuts off intermittently, when you turn it back on it says "check SF wires". What are SF wires?

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It's "check SP wires". It means (do I have to say it?) Check the Speaker Wires for short circuits.

Posted on Apr 25, 2010

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1 Answer

The protect mode is active - what are the fixes


It could be that there is a frayed speaker wire touching the back of the receiver and when playing at a low level the speakers do not require that much power, however when the level from the speakers increases more power is required and if there is a frayed speaker wire touching the back of the receiver there could be a short causing the receiver to shut down. A way to avoid the frayed wire is to use "Banana Connectors" that the speaker wires goes to and the connector will plug into the speaker posts. Please try the following to see where the issue is coming from. Have the receiver turned off, make sure all the speaker wires are labeled, and disconnect them from the speaker terminals.
Turn the receiver on select a source that would give you sound if the speakers where still connected and turn the volume all the way up. If the receiver shuts down than it would need to go to a service center as it is an internal problem with it. If the receiver does not shut down, turn the volume down, shut the receiver off and connect one speaker and than turn the receiver on selecting the same source as before and raising the volume up. If the receiver shuts down, remove that speaker from the post and connect it to another speaker post to determine if it is the receiver or the speaker itself that is giving you the problem. If the receiver should shut down after moving that speaker you know it is a problem with the speaker or the wiring. If the receiver does not shut down, turn the volume down, shut the receiver off and connect another speaker followed by doing the previous test procedure. Keep adding speakers until you have them all reconnected to the receiver as long as it has not shut off while trying the test procedure. After determining whether it is the speakers or the receiver you would need to bring either to a service center to be repaired. To locate an authorized independent service center, check the dealer and service locator at our website:
http://www.onkyousa.com/Support/servicecenterLocator.php?source=globalnav

Apr 12, 2015 | Onkyo TX-DS787 Receiver

1 Answer

Car stereo cuts out


It is possible a self-protect feature may be shutting down output. Check all of your wiring, following the manufacturer's instructions exactly. Faulty wiring is a major cause of poofed audio output devices in car audio. Any short in wiring, or an open (intermittent or otherwise) can cause a problem here. Internally, bad solder connections where the output devices solder to the board could cause problems too.

Jul 03, 2007 | iLO XM-MP3-CD Car Stereo

1 Answer

Cooling fans are wont turn off


Check for broken wires in the wires you are moving around Check for broken connector pins in the wires. You have an intermittent connection in the circuit.

Mar 08, 2013 | Cars & Trucks

1 Answer

Get several codes , when i turn it on all the lights come on and display has a 888, then a 180. all goes off, receive a code sf 1, then an r4


Check your stack flu sensor. Sensor can not be jumped. As soon as the heater fires hold down the pool or spa button until the stack temp appears. At 500 degrees the heater will shut off giving a code. The heater should not restart. I would also check for wire damage based on the description of your issue and the board restarting on it own. You may also have damage to the "user interface board" , hard to say with out on site trouble shooting.

Jun 04, 2017 | Sta Rite Sta-Rite Max-E-Therm High...

1 Answer

Similar situation as previously described with the Denon AVR-1508, but mine will shut off after about 10-12 minutes the first time around and then ~2 minutes after it is turned off and then back on. Unit...


Most new receivers have a fan on the back, if you have one check to make sure it is working, most won't activate until the unit gets warm, other issues are bad solder connections on the audio outputs causing intermittent shutdown, as a final inspection check speaker connections to the receiver and speakers.

Sep 18, 2011 | Denon AVR-1508 Receiver

2 Answers

Pool heater shuts down indicates SF code


Temperature sensor failure code.Check the wiring on the sensor or might be a bad sensor. Here is the link for the heater manuals. This is a general code depending on Make and Model...

Jun 27, 2010 | Hayward 250kbtu Ng Pool Heater - Inground

1 Answer

My receiver clicks on a off randomly.


Hello Fixya customer,

Thank you for your question.

Are you getting on the display, possibly a "P" or "Protect" that indicates it is in the protect mode?

Hitting the top of the receiver indicates a possible intermittent component or board connection. The receiver will shut down when the Microprocessor receives various fault conditions, including shorted speaker and wires, but if it develops an internal fault it will also shut down to protect itself and the speakers.

Remove all speaker wires and inspect th terminals for any stray wires shorting the terminals.

If it still shuts down, then a professional servicer would be required.

Thanks for using Fixya, and if I can help you further, please let me know.

May 01, 2010 | Sony STR-DE545 Receiver

1 Answer

My Denon AV-3801 will just turn itself off if volume is turned up. I have checked for crossed wires and such,not sure what is going on. Any answers?


Disconnect all speaker wires at the receiver, then turn it back on. Turn up the volume. If it shuts down, it needs to be serviced. If it stays on, reconnect speakers one at a time and turn on the receiver then turn up volume. When you find the speaker that causes the receiver to shut down, disconnect the wire at the speaker and re- test. make sure wires are separated. If it shuts down, replace the wire, if it stays on, meter the speaker itself to check for a bad vioce coil. If you don't have a meter, you can take the speaker to any audio shop or Radio Shack and they will usually test it for free. Hope this helps.

Sep 27, 2009 | Denon AVR-3801 Receiver

1 Answer

8001 Receiver keeps going into protect mode. What


Fastest way to check the receiver is to disconnect all speaker wires at the receiver and turn the unit back on. If it does not go into protect, your receiver is ok and you need to check all wires and speakers. If just one piece of braid on a speaker wire touches the other, it may not shut off immediately, however, as you turn up the volume the current level rises in the wire and creates a short. Thus, shuts down the receiver. If you need further help troubleshooting, post a comment and I can walk you thru it. Hope this helps.

Aug 16, 2009 | Audio Players & Recorders

1 Answer

Sound turns on and off intermittantly through unit


You may have a bad protection relay or solder joint at the relay mount position. This relay prevents power supply "thumps" when the unit is first turned on, and also shuts the amp down when there is an overload problem....accordianman

May 29, 2008 | Yamaha RX-V661 Receiver

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