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Sa 606 Fuse blows on step down transformer primary winding, Where can I get spares from?

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

MicrowaveSvc
  • 9047 Answers

SOURCE: Samsung M1630 stepdown transformer details

That model doesn't show up at my normal Samsung US parts supplier. Can you post all the numbers found printed on the transformer? One of them should be the Samsung part number. Normally you can look at the voltage rating of the large filter capacitor on the control board and assume that the AC secondary voltage will be about 2V less (in ACrms) than that DC voltage. Now what I'm saying may seem a bit twisted - and it is - but what I mean is this: If the cap is rated at 15VDC, then I'm saying that a secondary voltage of about 13VAC rms should be a good safe level for testing. To confirm this, multiply 13VAC by .635 (assuming it uses a full-wave rectifier) and you get about 8.26VDC. Then allow for about 50% derating by mulitplying the 8.26VDC by 2. This gives you 16.5VDC, which with my generous derating, is pretty close to the caps 15VDC. Then you can remove the transformer and use an isolated Variac(tm) to apply that calculated AC voltage to the secondary connections at the circuit board to see if it powers up. You can measure the DC voltage across the cap as you adjust the Variac(tm), making sure you don't get too close to or exceed the DC rating of the cap. Once you get it working with a main DC voltage of about 50-75% of what's printed on the main electrolytic capacitor, you can start shopping for a sub transformer. It's much easier if it's not a VFD display which would require a separate filament winding, but there's nothing wrong with using a small second transformer for that. You can even mount them both on the chassis and run long leads to the board. As long as the leads are of sufficient gauge, routed and secured well, and protected from nicks, there's nothing worng with that technique. You should make them long enough that if the front panel is later removed for service, the next technician will be able to see the wires before he pulls them out or otherwise damages them. I would also add a varistor on the primary if there's not already one! *grin*

Posted on Nov 01, 2006

SOURCE: LG MS-2143RSL MICROWAVE OVENT NO HEAT

hi i am suggesting that it is probably the magy as the res to grndis a bit low and therefore loading the sec supply down , just a thought
cheers grant

Posted on Oct 23, 2008

sardanadixit
  • 813 Answers

SOURCE: Transformer

For transformers, the voltage to turns raio is calculated by formula:

V1 / N1 = V2 / N2 where,
V1 >> Voltage at primary
N1 >> number of turns at primary winding

V2 >> Output voltage at secondary
N2 >> No. of turns at secondary winding

So in your case:

V1 = 230 and V2 = 10. If you know the no of turns of winding at one side, you can calculate the turns on the other side.

Posted on Aug 12, 2009

Grubhead
  • 5017 Answers

SOURCE: The main transformer in my Sherwood amplifier is

I would contact Sherwood as Transformers are deemed to be safety components and should be replaced with excat parts or those recommended by the maker.

Posted on Jan 25, 2010

  • 64 Answers

SOURCE: WAVE radio transformer bad ???

If you can check ohms,you can also read volts. Open the radio again and look for DC volts on the rectifiers capacitors.They look like :cans", normally the color is blue. Check for positive dc v. against chassis ground. If no + tension,your rectifier or your secondary are open.

Posted on Feb 15, 2010

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1 Answer

Sa 606


Dave , If that fuse is blowing , there is a problem in the power supply or output section. If you have a meter that can test diodes / transistors. please check the output transistors first. Most likely one or more are shorted. If they check ok , you should check the power supply diodes .You can order new ones from a number of online stores by simply putting the part number into google. Hope this helps ?

Apr 20, 2014 | Pioneer Audio Players & Recorders

Tip

Lowrance LCX power up problem


On Lowrance LCX-19 and I would assume other LCX series units.
The T3 Transformer shorts out and when the sonar kicks in it causes the unit to go over current and will eather cause the unit to reset and start again or blow the fuse. If you have the ability you can re-wind the transformer.

The primary is 46 turns of 24awg inverter duty magnet wire,
The secondary is 164 turns of 26awg inverter duty magnet wire.

Be sure to keep the same winding direction as what you take off as it may be phase sensitive. Be sure to use mylar tape between the primary and secondary windings.

Just a note this board has very heavy power planes and is very hard to solder/de-solder on.

If you have any questions or need help you can contact me at info@jtechnicalservices.com

on Jul 20, 2010 | Lowrance LCX-19C GPS Receiver

1 Answer

How to identify the matching transformer terminal by means of terminal resistance? and which terminals is for input or output?


Doing a resistance test on a transformer will not give the information you require as you will read very little, if any resistance. What you need to do is an impedance check and that gets involved. If it is a normally wound transformer, not an auto transformer, you can isolate which is the primary and the secondary windings. Unless the transformer is a multi voltage input unit, the primary side will have continuity through only two terminals. The secondary could be more than two if it is a multi output voltage one. If the transformer is a step down, the primary windings will be the thinner wired windings and vice-versa. To actually test the transformer, get hold of a transformer with about a 20 vac output and try it across the two terminals you have identified as the primary windings, you should ge a proportional voltage of the actual output. eg. with 20 vac input and a 2 vac reading at the secondary, the actual output would be 11 vac if your mains voltage is 110 volts. Take care that you are using the transformer at the voltage it is designed for, otherwise it will overheat and burn out.

May 11, 2011 | Kitchen Ranges

2 Answers

Getting f3 mag current reading


f 3 means blown fuse , which is located on the right side of the unit at the bottom , third one accross, once you have tested the fuse and found it to be faulty, before replacing it , you have to find out why it has failed, there are several reasons why this has happen , 1/ if primary and secondary interlocking door microswitches on left side panel open before monitor door switch on the other side ,it will put a short accross L1 AND L2 blowing F3 fuse , 2/ CHECK high voltage transformers to see if there are signs of burning on either primary or secondary windings, if you are not a tech or a electrician it is very hard to explain how to test to the other componets, capacitor doide or magnetron visual inspections is all you can do

Mar 11, 2010 | TurboChef C3 Single Oven

1 Answer

I plugged my 110 volt samsung 26 ln-s2651d tv into 240 volt ac. fuse? transformer? or garbage?


A lot of times it only pops the on board fuse, or if it has a transformer,  then it often simply "Blows" the Primary windings and not too much happens on the secondary, If it is a switchmode well then you probably will have to replace the entire thing.

Feb 01, 2010 | Samsung LN-S2651D 26 in. LCD Television

2 Answers

Element FLX-2611B won't turn on. The red light is not lit


Just because fuses are intact does not mean it is not damaged. Sometimes a small spike of power does not blow a fuse but damages Transformer windings Before the fuse! If there are no lights picture or sound think powersupply transformer primary.

Aug 14, 2009 | Element Electronics FLX-2610 26 in. LCD...

1 Answer

Kenmore Micro/Oven fuse keeps blowing


Disconnect the connector to the primary winding of the high voltage transformer. Put a new fuse . If the fuse is not blowing the problem may be in the secondary side of the high voltage transformer. Chek the highvoltage diode, capacitor, magnetron respectively. you can also check the primary winding of the low voltage transformer.

May 23, 2009 | Microwave Ovens

1 Answer

Roland Jazz Chorus 120 no signs of life! Plug fuse & back of amp mains fse OK Mains transformer??


The transformer on these units contains an internal fuse that may have blown. With the unit unplugged, measure across the primary winding of the transformer. It should read low ohms. If you get infinity, the primary is open and will require replacement.

Dan

Nov 11, 2008 | Audio Players & Recorders

1 Answer

I have a digitor subwoofer (A3111) and it looks like the fuse is blown. Looks like it needs a "F1AL 250V" fuse - but when I looked for one in the shops, I couldnt find it. Do they still exist?...


Firstly, the fuse is just a slow blow 1 Amp short style. You should be able to get an equivalent at any electronics parts supplier (a 1.25-1.5 Amp will do as long as it is the correct physical size).

Secondly, the cause of it blowing the mains fuse is probably a short in the primary winding of the Toroidal transformer. I have now replaced the transformer in mine twice over about 4 years.

If you cannot get the original Toroidal transformer (with the correct connectors) use a 50 or 80VA 12+12V Toroidal Transformer and connect the secondary windings in series. You should be able to get one for AU$30 to AU$40.

Oct 05, 2008 | Audio Players & Recorders

1 Answer

110v


Usually it "Blows" the primary winding of the step down transformer and often does nothing else, if ya lucky, so try replacing the transformer, sometimes it can also, as well blow the Bridge Rectifier OR rectifier Diodes, on the secondry side. I havent seen schematics have you Goggled for them?

Aug 08, 2007 | Philips Magnavox 20MS233S 20" TV

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