Newbie help in final wiring of G9, quick question?

[monty]

First project, almost done. This is a great place ! :0)

Can someone please tell me...

I need to wire the primaries to the 220V point on the main PCB...

I have four wires, two from each transformer representing a primary winding from each of them...

Do any of the two connect to the 220V position, while the other two are not used or just wired together ?

Do I join the two primary windings from one TX together, same with the second one, then connect them to the 220V point?

OR have I got it completely wrong?

I have the wiring diagram from NRG recordings site, but I am unclear on this last connection still, and want to be sure with HT.

Thanks so much, sorry bout the dumb first up question ! :grin:

 

[monty]

anyone?

 

[matthias]

if you look at franks (nrg) diagram everything should be clear...

 

[monty]

[quote author="matthias"]if you look at franks (nrg) diagram everything should be clear...[/quote]

As I mentioned it is still unclear....

Ok, so the diagram shows where the primaries go...

BUT, I have four wires...

So do I join them together to make two pairs then connect them. Do I only use one primary and just terminate the other winding?

Franks diagram dosent show or mention any of that...

 

[mfdu]

the two orange wires go to either side of the IEC 220V input. thats the feed to the trafo.

the white and yellow are the 0V - tie them together and onto the PCB 0V they go. finally, the hot coloured wires (red and purple, maybe?) - these are the + voltage (24, or 15, or whatever). doesnt matter which is which, but one goes into the +24V and one into the -24V on the PCB.

hope that helps. scary, innit?

chris.

 

[monty]

Shouldnt there be two wires on either side of the IEC? Man, its very confusing. Not sure what to do.

 

[monty]

Ok..

maybe with this info someone can help me out please...


the secondaries I have a handle on and they are ok...

Primary blue/grey AND violet/brown.

So...

I have two transformers obviously, so two sets of the above colours...

 

[Sammas]

Ok now im confused?

Do you have two different transformers? or one transformer with a tapped primary for 110v/220v operation??

 

[monty]

Hi Sammas,

Thanks.

I have two TX's that are the same, each has 2X primaries.

One primary is listed as the blue/grey, the other primary as vio/brown.

Same for each TX. Am I still not making sense , sorry if Im not....


My problem is not knowing how to connect one of the TX to the mains, and not knowing which wires to connect to the 220V on the board...

 

[Rob Flinn]

Normally there is a legend of what wire is what on the side of the transformer.

You have 2 primaries they are normally listed something like this

0-120 blue-grey
0-120 viol-brown

If it is for 120v operation you would connect blue & violet for one connection & grey & brown for the other.

For 240v operation connect grey & violet together & make your connections to blue & brown.

Remember this is an example so check the legend for your particular transformer.

 

[monty]

It just says pr. 1 115V and lists blue /grey , and vio./brown for the other one. Nowhere does it say 0V ??

Now when I check continuity on the primaries, i/e blue grey on either probe on a DMM, I get nothing...

May have destroyed the TX ?

 

[monty]

On the TX that is connected to the mains, I have 55V showing on the secondary !!! :shock: :shock:

I am guessing that that means its useless now.

Think I might scrap this one.

 

[Rob Flinn]

Now when I check continuity on the primaries, i/e blue grey on either probe on a DMM, I get nothing...

May have destroyed the TX ?

Does it smell burnt ?? Also If its burnt it`s usually the enamel insulation that`s burnt so you wind up with the turns shorting & less of a resistance reading on a meter. Are you reading resistance on your meter on continuity ?

 

[monty]

[quote author="Rob Flinn"]

Now when I check continuity on the primaries, i/e blue grey on either probe on a DMM, I get nothing...

May have destroyed the TX ?

Does it smell burnt ?? Also If its burnt it`s usually the enamel insulation that`s burnt so you wind up with the turns shorting & less of a resistance reading on a meter. Are you reading resistance on your meter on continuity ?[/quote]

Thanks Rob,

No it didnt/dosent smell burnt, BUT im not getting continuity on the primaries. On probe on each winding, and no reading. In guessing that isnt good ? :0)

Ill have to go back and check resistance. Any rough figure I should be looking for ?

 

[peter purpose]

Monty,
Make sure you've scraped off the enamel coating on the wires.

peter

 

[Rob Flinn]

Ill have to go back and check resistance. Any rough figure I should be looking for ?

Don`t know off hand. If you continuity check the resistance may be too high for the continuity check, depending on your meter. That`s why I`d use a resistance check.