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Anonymous Posted on Nov 04, 2013

I'm searching for nad 5440 power transformer specifications - secondaries voltages ....

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Anonymous

  • 1 Answer
  • Posted on Dec 08, 2005

SOURCE: MS9700 secondary voltage

I am working on the same situation. DId you first check to see if it isn't the fuse that has blown? Radio Shack has a 4 pack of 2 amp fuses for $2.49 which I think will work. Their catalog number is 270-1064. These as 5x20mm in size (the 1-1/4 x 1/4 inch is way to large) and they are slow blow - designed for this type of household equipment to protect from short circuits and power surges. If you are lucky maybe it is just the fuse. Since I can find no other information about this unit - especially the transformer - I'd check eBay for a working one. If you can get it cheal and it works test the power output with a VoltOhmMeter (VOM) and once armed with the info you can let me know too what the output is . You can then get a new transformer - have 2 working units - can keep or sell one to recoupe your eBay purchase. Just a thought. Hope it is only the fuse.

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Anonymous

  • 68 Answers
  • Posted on May 25, 2008

SOURCE: power supply (transformer)

You should have just one supply voltage on an AM type dishwasher. Find the data plate in one of these places - frame behind RH door, on the control box, under the front cover. The required voltage and phase (1 or 3) will be listed there.

What is the problem with the unit?

ltfrc

Mike Schmidt

  • 227 Answers
  • Posted on Jan 14, 2009

SOURCE: Transformer has failed in my Trutech M#KLV3112

The transformer should have the input and output rating labeled on the unit itself. Such as input 110vac, output ...... dc.

Anonymous

  • 21 Answers
  • Posted on Nov 19, 2009

SOURCE: HP printer AC power adaptor 0950-4399

I just get one from www.order-bulk.com my print is working now

j2easy

Allen

  • 152 Answers
  • Posted on Dec 11, 2009

SOURCE: Pioneer SX-203 power transformer ATS1526 secondary voltage???

just a question.1st.. if you don't know what you should have... then what are you going to do... if it's lower or higher ... seems like you should have a print before you go looking...go check at the off and on switch for the standby .. 9v more or less to trip the relay to turn the sys. on... now get a print...or go backwards to the transformer to see if it's blown. or something in between is open

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My Electrolux EWF1090 PCB burn.There is one Transformer with Printed "Hartu 717162-51" burn. May i have detail of this transformer ? Primary Side voltage (2 pins) ? Secondary Voltage (3 Pins) ? VA ?

I would investigate what voltage the transformer connects to for primary and what voltage devices connect to secondary. Bring in a temporary power source and read the amperes it draws to operate and find the product of secondary volts and amps to select a new replacement txr
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PIONEER PL-720 TURNTABLE MAINS SELECTOR VOLTAGE TRANSFORMER OPEN CIRCUIT, CAN I ELIMINATE IT NAD OPERATE FROM 110vac DIRECT?

What you are talking about is rebuilding the power supply for the turntable. A tricky job. Can you not find a replacement transformer?
Otherwise you could find a pre-built power supply, providing it has the correct secondary supply for the turntable.
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Schematic malibu 8100-9120-01

http://waterheatertimer.org/Malibu-power-pack-stopped-working.html

I don't think they post schematic for the transformer
But generally, the primary coil receives 120Volt AC input from household electrical outlet
And the secondary coil produces 12Volt AC output for the low voltage lights.
The 'coil' is a coil of insulated wire wrapped around a metal core. Two coils set side by side create a transformer... when primary is energized, the secondary responds to the magnetic field caused by primary core... resulting in a current that flows on the secondary coil.
Output voltage on secondary coil is determined by the number of wraps and diameter of wire.

Some transformers offer a choice of secondary output... Kichler for example... you can select 12-13-14-15 Volt AC output
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Gene

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

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Yamaha ca 1000

Probably 60-70 volts. If you need a service manual, I may have one at a cost. For a guesstimate on the voltage, you can check the DC voltage on the large filter capacitors on the filter capacitors following the bridge rectifiers.
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How to test for bad transformer

  1. To test a transformer you need to know what type of transformer it is first. There is a step up transformer which steps the voltage up and a step down transformer which steps the voltage down.
  2. You will still test the transformers the same way for step up and step down transformers. If it is a step up transformer apply the incoming power to the transformer or plug it up. Now take your multimeter and place it on the AC volt scale and test the voltage if the voltage on the data plate says the transformer should step up to 220 volts and it doesn't then your transformer is bad.
  3. Now repeat the same steps for a step down transformer. Plug up the incoming or primary power and test voltage on the outcoming or secondary side the voltage should step down to the proper value. If you don't read any voltage on the secondary or outgoing side then the transformer is bad.
  4. To read the voltage place the two meter leads on the secondary side, or the side you will plug your equipment into. If the secondary side is an outlet then place the two meter leads into the top two slots in the plug and read voltage. You also want to make sure the incoming power is working as well. Otherwise you will be reading a bad reading every time.
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I have a Yamaha preamplifier CX-800/U where the Powertransformer is defect which let the primary 220V transform into secondary voltages.I know the transformer is no longer available but i would like to...

I asked for more info, but I have replaced many hundreds of unobtainable transformers. All the voltages can be found by a bit of logic thinking & observation. If I have the item in front of me I will have the solution in minutes.
Double red with black, expecially together is normally a X-0-X winding, identified by the rectifier & smoothing caps. The voltages on them will give some indication, but tracing the voltage to an regulator is an accurate solution.
What are the voltages used for?
Normally the one winding will be a low voltage like 12-18 volt for the pre-amps mixers etc. This very often will go through oner or more voltage regulators. Their voltage is written on them,and they will have have small heatsink on them & live near the rectifiers & caps. Look for three legged items marked something like 7812. This is a 12 volt reghulater while a 7809 is a 9 volt regulater. The split voltage say from 20-0-20 to 80-0-80 max will drive the power amp. A 20 watt stereo amp will most likely use two integrated circuits. Luckily you can find their operating voltages very easily by typing in their number like TDS2005 into google. As for an output stage like a 60 to 100 Watt amplifier, a voltage like 60 0 60 and 80 0 80 is used. If in doubt, go a bit lower & play safe. All you will loose is a few watts. If logic (computer circuitry) is used, all computers use basic only 12 volt and 5 volt. Very easy.
Before you give up or look for a new transformeer, just check!!!!!
Most *** xformers have a secret fuse inside them which is easily replaced if you know how!
Send photos! (under 60Kb)
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7250PE preamp works, power amp both channels out. Could this be a fuse? Thanks, Mike

Could be possible considering the power amp would be running on a higher voltage rail than the preamp. It really depends on how the manufacturer designed the power supply. If they just have a step down transformer driving a bridge rectifier and then derive the voltage for the preamp by regulating with some for of linear regulator than the fuse theory is not correct. Best bet would be to pop it open and examine what comes after the transformers secondary. Depending on the power this amp is capable of the power supply could be a switch mode instead of linear. You can tell by the weight of the amp, heavy = linear light = switch mode.
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What are the secondary voltages off the transformer supposed to be?

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It happens sometime with low voltages. Try putting in a voltage stablizer in the path and test it. If it works, get a high quality component to give you correct voltage.
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