Any help would be great thanks.
My Line output transformer for the CRT has blown in my Goldstar OS-7020A Oscilloscope. part number on the transformer and in the service manual is 622-017-9 and description is HVT-3D(4011). thats all the info i have, the transformer looks like a small black cuble about 1 inch square roughly.
Thanks for any help leading to a compatible or similar transformer.

 

I would suggest the only way is as a spare part from Goldstar or a spares distributor.

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but the suppliers here cant get one, its possible that i may be able to adapt a flyback transformer to suit it, but would have to find a small one and rewire it without the diodes, surley there are other transformers of the same type that would do a similar job. thanks if anyone has more info

 

no luck finding it yet, anyone else have any ideas? would a photo be of any help, or is the model number and description enough? it is NOT a flyback, the diodes are on the PCB not on the transformer.

 

You've already had the answer, wishing it wasn't so isn't going to make any difference - it's almost certainly specifically made for Goldstar, and will only be available through them.

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but there is no goldstar office in New Zealand, so its not much use asking the suppliers here, why make a product that cant use standard parts? its pathetic, they know its technicians that use this sort of equipment, if they cant supply parts i think its bad on their part.

 

Perhaps I don't expect Nigel to add another reply that you may have to contact the manufacturers, may be Korea or any other country, and try placing an order and import by paying duties.
Alternatively any T&M equipment repairer would know methods of how to go about in such cases. you may find some local services in your country and get it done by payment if you don't feel like importing a spare part.


look up to north and you might find Korea's helping you.

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Regards,
Sarma.

 

Did you buy the scope in New Zealand?, if so there's presumably a service system in place 'somewhere', but probably only authorised service agents will have access to spares.

An EHT transformer in a scope (or indeed anything else) is a specially made part for a specific model, there never have been any 'standard' parts.

__________________
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http://www.winpicprog.co.uk

 

be able to get in parts from them, but not anymore, if worst comes to the worst i will try and contact korea, its now LG electronics anyway. however i have been advised it shouldnt be too much trouble to make it take a flyback by a few mods, i will try and find more specs on the transformer, if i can find something that puts out the same voltage, it should work fine

 

I moderate my opinion towards a replacement of the scope as it is just 20MHz one.

to purchase another secondhand one may be cheaper than searching for the spare part and the transportation of same to reach you. I was watching few ads on e-bay -- better ones like 50 or100MHz at a reasonable price.

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Regards,
Sarma.

 

if i dont get anywhere, however, it is far better quality than alot of the cheap chinese scopes i see even if they are 100mhz, ive never really needed to go over 20mhz

 

Have you checked eBay?

You might be able to buy a new scope for cheaper than the cost of repairing it or buy a broken scope with a working transformer for next to nothing.

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its probably will be cheaper to buy a new scope, but i will try and see if i can rewind it, it looks like its not that hard to rewind, here is the photos of it, to see if anyone knows if they have seen one:

 

My 'scope was an American kit, is about 43 years old and still works fine.

I worked with some Goldstar telephone systems in 1980 and they had the worst circuits, pcbs and soldering that i have ever seen.
No wonder they changed their name!

My monitor is an LCD Samsung made in Korea and it works fine so they learned how to make things properly recently.

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Uncle $crooge

 

Hai, Nzoomed,
After observing the photos, I feel hopefully that the transformer may not be faulty. please have a check at other components at the voltage multiplier at the output of the transformer. some times either a diode or a capacitor might be responsible and we may suspect the transformer. try removing ONE limb of each component and have a thorough check with Multimeter for any leakage.

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Regards,
Sarma.