Question about JVC RX-554V Receiver

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No Power The Reciever does not power up, The mains comes in and through the switch, but diappears in the tap switch or transformer. dont have wiring diagram so cant realy test for voltage. All fuses are correct, non have blown.

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Re: No Power

Low voltage problem most likely in the secondary supply...accordianman

Posted on Oct 25, 2007

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Denon dra 25 no power

If you have a multi meter then unpug from mains supply.With meter
on "ohms" range check the following:-
Fuse F501 (and F502 if mult-voltage model)
yellow to white on mains transformer this should show some resistance.If you have a mult-voltage model check
brown to gray and orange to white. Both should show some resistance, if not your mains transformer has an open circuit primary winding.....

Mar 03, 2014 | Audio & Video Receivers

1 Answer

My Kenwood KR-v8050 reciever will turn on, but will not go out of stand by mode, the visual screen also is not working, what am I looking at to fix this?

Sounds like either the main power fuse is blown,or the power transformer is bad. If the fuse is blown, probably means the amp is shorted.

Dec 31, 2012 | Audio & Video Receivers

2 Answers

Sr 4300 reciever will work for 10 mins or so then cuts out

It may be an overheating problem. Make sure it is well ventilated. Also it could have a build up of dust bunnies inside in some of the heatsinks. If you are comfortable with it, take of the cover and gently blow it out with a compressor (low PSI) or canned air so it is clean inside. May also be an intermittent part which is a bit harder to find.

Jul 01, 2010 | Marantz SR-4300 Receiver

1 Answer

Reciever will not turn on, has power before the main transformer but none after?? woud that be the transformer or would it be another component?

the transformer has a thermal cut out inside the winding.if you peel back the varnish coated paper where the wires go in ,you will see a cylinder .about 1/2 inch long with a cone shaped end.The thermal rating is on it.Replace that and it works again.
The typical output on that type of tranformer is a 12v 36 volt and 100 volt center tap winding set.when rectified,will put out +-9,+-27 and +-70 volts .

Feb 12, 2010 | Yamaha RX-V1700 Receiver

2 Answers

It powers off immediately when I turn it on


Thanks for using FixYa. From what you have described it seems the fault is in the voltage selector rotary switch, it’s the round voltage selector switch not the other one, because you'll notice that there are 2 voltage selector switches at the back. The lock might be broken so you couldn't switch the primary terminals of the main transformer. In other words this amp has 2 power transformers, the small standby transformer and the large main transformer. Try to press that round switch and press the front panel power switch. If it goes ON, then fix the center lock of that round switch. If not then you might have to replace the switch.

Please do accept the solution if the issue is resolved or else revert for further assistance.


Jan 16, 2010 | Pioneer VSX-D508

1 Answer

When I power the reciever on all i hear is a click noise and it does nothing else.

Check the main fuse if it is open (blown) it will probably need output transistors MP1620 MN2488, if not it may need the main power transformer.

DO NOT use a slow-blow fuse this will cause more damage to the receiver!

Oct 21, 2009 | Sony STR-DE485 Receiver

2 Answers

Yamaha rx-v461 not working

you have a faulty circuit somewhere, whether its in speaker wiring, or power source, i dont know, but your reciever has an automatic circuit breaker in it for protection, and a faulty circuit will trip it, i would assume it is a power source problem since it wont turn back on, check wiring, plugs and look around, and smell for burnt, or hot components.

Jan 21, 2009 | Yamaha RX-V461 AV Receiver

1 Answer

I have a cambridge audio A300 V2.0 amplifier that wont power up. i've checked for power at the switch and there is power and i've checked on the main board at the fuses but there is no power there, the...

Hi there get a multimeter place across mains input on transformer,FIRSTLY DISCONNECT AMP FROM MAINS,set your meter to contiuity ,if good you should get a low ohms reading (resistance),then check the secondaries (output of transformer) either 3 wires or four going into amp board..if readings acroos all wires are low ohms then transformer is good if one is open ,transformer has had it ...hope this helps

Dec 08, 2008 | Audio & Video Receivers

1 Answer

Unit won't power up completely

The clicks you hear are the relay that completes the circuit for 110V AC to the main power transformer. Mine had the same problem and here's how I've gotten it to work. A lightning strike near our house caused it to fail, and I traced it to the power transformer relay activation circuit. The tuner and amp were fine. I found a bad transistor in the relay circuit, but didn't have a replacement on hand, so I soldered a jumper wire across the relay switch connections on the power transformer circuit board. This connects the 110V AC directly to the power transformer. DC Power to the amp and tuner circuits will still be controlled by the power switch, but the transformer will be supplying all the AC voltages to the main board. If there is a real problem with the circuits that load the transformer or the transformer itself, then the fuse will blow. If the fuse doesn't blow then I suspect the problem is just in the power sequencing circuit itself, that is not needed for operation other than to make the unit "Energy Star Compliant". A lot of electronic items have a transformer that is not switched, and only fused, so that the supplies are available at all times.

Jan 24, 2008 | Audio & Video Receivers

1 Answer

Power off

check the fuses, there is one (fu1) behind the transformer and 2 under the transformer board (fu3, fu4)

Jan 28, 2007 | Optimus STAV-3560

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