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

Posted on Oct 25, 2007


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?Location and photo of the transformer for a gaffers and sattler wall furnace model S 90 FE.

No. The transformer "transforms" 240 volts to 24. Meaning the high voltage coming into the machine. Normally has a "c",208,240 written on one side. Follow your main power wire into the machine. Branches to heater and transformer. Look at wiring diagram

Mar 01, 2017 | Heating & Cooling

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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 Players & Recorders

2 Answers

I am trying to wire this unit to a honeywell t stat model T87N1026

Wiring a new sub-panel to an isolation transformer is one method of wiring for balanced power. With a balanced power system, the power sent to each "hot" bus of the power panel is 50 percent per bus. This means that the total power of the system is split evenly between each side of the panel. Balanced power systems have the advantage of reduced noise generation. This characteristic makes this type of system great for audio.
1.Shut off the power feeding the isolation mains transformer at the main power panel. Use the documentation supplied with the isolation transformer to locate the center-tap wire on the secondary side of the transformer. Connect that wire to the sub-panel's ground bus bar.
2.Route the remaining two wires from the secondary side of the isolation transformer into the sub-panel. Loosen the two "hot" wire main bus screws in the top center section of the sub-panel. Strip 1/2-inch of insulation off of the two wires.
3.Insert each wire separately into each of the wire screw terminals.Tighten the screws to hold the wire in place. Do not over-tighten these screws. If there is a neutral wire, connect it to the neutral common bar. Once these screws are tight, close the sub-panel.8_8_2012_9_21_38_am.jpg

Jan 18, 2011 | Heating & Cooling

1 Answer

I have just set up a new mains powered electric fence and i need to install a cut out switch but i wired it in the way i was told and the system dont work. what am i doin wrong

Where are you checking the power at? The transformer? Or the fence wire itself? The power to the transformer is basic 110 volt, 15 or 20 amp circuit, need to be in a pipe or somewhat protected, , like through a wall. The transfomrer should be accessible, and can be switched by a light switch in a box. Your fence wire has to be a continuous run, no breaks, and make a complete circuit. It comes in different voltages, And will blow out a tester in a flash if it is on the wrong setting, so start with the high voltage and work your way down when testing. Some are just a tickle, some will knock you on your ****. So be careful. Make sure the breaker is on and good, and the plug is good if it has one. Also, it should hum or buzz when running. The horse will only have to touch it one time and he will never go near it again. Hope this helps.

Oct 05, 2010 | Electrical Supplies

1 Answer

My mini max NT 400 shows it is not getting power. Nothing on the display is lit. Not sure where to start, any help is appreciated. Thanks

Start at the begining, make sure you have power going to the heater and check to see if it is 110 or 220v. If you have power and it is correct the next stop is your transformer and how it it wired. You should have a diagram inside the main power junction box for the heater. If you have good power in to the transformer and 24v coming out it will be in your safty circut. Roll out switch and pressure switch are good places to start. The main power or transformer are probally where you should look.

May 09, 2010 | Pentair Minimax NT Heater

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

1 Answer

How do i hook up my humidifier using a seperate transformer

If you chose to install this with an auxilary transformer. Turn the main power off to the furnace. Mount the transformer on the handi box to the furnace or inside the furnace cabinet. Wire the primary wires from the transformer to the main power coming into the furnace. Connect black to black and white to white. Wire the secondary side of the transformer in "series" with a #50 relay, the humidistat, the solenoid valve and back to the transformer. Determine which wire powers the blower motor for the heating speed. Clamp the #50 relay to the wire.
Good luck
HVAC Teacher

Feb 22, 2009 | Honeywell HE260A1010 Whole House...

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 Players & Recorders

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 Players & Recorders

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