Question about KLH R3100 Receiver

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Power supply board

The power supply board seems to be the problem because I switch this reciever on and it immedialy shuts down, the fuses are fine

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Re: Power supply board

That also can be a PROTECT mode. Maybe you should check connections.

Posted on Oct 11, 2007

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Shut off during loud play

Many receivers have a thermal "overload" switch that will shut down power to protect the rest of the unit if it senses an issue like excessive heat, or if the ohms or impedance gets too high. This is a safety mechanism and you should probably seek a qualified audio repair shop for further troubleshooting.

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My Yamaha rxv496 switches off after about 20 mins then switches on after about 10 mins.

sounds Like a power supply issue and u should always have speakers connected before u turn on maybe power supply is about done open case an check for any leakage on power supply unit or small cracks on it ...if so its pretty well done
Never good to power up without speakers connected can blow power outputs

Feb 07, 2012 | Yamaha RX-V496 Receiver

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Has reciever plugged into a dimmer switch and when I turned it on it was blinking on and off. So I turned the switch all the way on and the receiver made a zip noise shut off. Now it will not turn back on

In the first place I was wondering if you connected the set to the dimmer for a current test. Now did the fault occur after this was plugged into the dimmer or did the amplifier show fault prior to the test.
Remove power plug and test the main fuse. If there is no supply to the sections, then you need to check the power supply. If not the receiver can be on a protect mode.
If so the set will come on and shut off and if so the outputs must be checked, remove speakers to confirm if the amplifer works, if not the boards must be tested one by one to confirm. Use a multimeter for a continuity test for a short or a voltage test for a missing volage to the board.

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I am fixing a sansui rz-5000av receiver /amp. the problem is the power supply,it does not switch on. the fuse is fine, capacitors are all ok. But power does not reach connector for the standby supply to...

So you're saying ac doesn't get very far into the unit. THAT should be easy to diagnose with CARE since ac is usually passed unmodified to the fuses and power supplies, maybe through a relay. Get a digital voltmeter and find out where it disappears after getting into the unit.

Dec 31, 2010 | Sansui RZ-5200AV Receiver

1 Answer

Reciever shuts down by itself

Hi, i have similar/same problem, on initial power on, you have after 3 -4 secs an audible click from inside and all is good... if you then try to change inputs either via front panel and or remote, the unit switches off. if you change input prior to audible click, ie within 2-3 secs of power on , all is good and amp works fine, until you change input etc...very painful fault.. i thought it is sensing /checking the speaker outputs and detecting short etc ,so powering off to protect.. but then just my thought, i suspect something else, if anyone has the fix and can repair , please let me know.

Dec 24, 2009 | Yamaha RX-V800 Receiver

1 Answer

Power wont come on at all

May be the power supply check for power to the power supply and the output voltage from it as well !! May need to be replaced ! It cost $125.00 for part and $225.00 for a new one installed !!

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Denon AVR-1803 keeps shutting down

check your speaker wires make sure none are touching each other this will cause a short and shut the reciever down

Mar 17, 2009 | Denon AVR-1803 Receiver

1 Answer

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Disconnect everything from the amp except the power cord, then power on the amp. If the receiver still shuts down, your problem is inside the case and unless you can perform electronic repair yourself you will probably need to take it in for service. If it does not shut down with nothing connected, power it off, connect one speaker or component and power on again. Repeat the process until the amp shuts down and you may have found the bad speaker or other component.

Jan 01, 2009 | Onkyo TX-SR503 Receiver

1 Answer

Standby light on pioneer vsx-d308 receiver

I have the same problem. my sandby light is on but my receiver will not turn on! I checked my power going into the power supply board that was good. But i do not have power going to the transformer or the receptacle. And both of my fuses r good. check ur fuses and go from there . If u know how to get a power supply. please let me know.

Jun 14, 2008 | Pioneer VSX-D308 Receiver

1 Answer

Unit no longer powers up after shorting the switched plug in back of unti

you most likely fried a circuit board trace on the power supply

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