Electrohome g07s blowing Fly backs

mgb

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I read somewhere once that the G07s are prone to blowing flybacks.
Some how I haven't really dealt with alot of them but over a year ago I had one with a blown flyback and HO transistor, so I swapped them and if I remember correctly did the typical cap job. The monitor lasted a couple of months and then blew the flyback again.
I meant to look into it but just never did.
Now a month ago, I had another G07 that appeared dead but it had high voltage.
Bassically I replaced a couple of caps that had bad shrink back (I shoulda done 'em all but it was a rush job). The tube appeared to be bad, so I used the tube from the one that blew its flyback last year.
anyway this monitor lasted less than a week before blowing its flyback.
maybe it had something to do with that tube? Is there a typical known problem?
I'm wondering if maybe its due to a bad power cap that wouldn't typically be changed during a cap job.
any ideas would be great. Thanks and sorry for the long winded thread.
 
If you are using original flybacks, then that is most likely why they are blowing. Even swapping a known good original from a different chassis isn't good if the chassis you swapped it to has even partial new caps. It stresses out the flyback and it blows, usually taking the HOT with it.

Now, a new flyback should last quite a while without blowing (assuming you use an isolation transformer. If you are blowing new flybacks, then something is wrong...
 
the one I did last year was a new flyback and HO transistor.
 
After your rebuild, are you checking the B+? What is that voltage?

It sounds to me like it's running hot and causing premature failure.
 
Yeah, good point. I didn't even really think of that. I've got to start remembering to verify B+
Thanks
 
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