New Flyback, no HV cup

baritonomarc

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Hi guys,

i recently purchased a Flyback for my MTC900: a HR Diemen HR6051. The problem is that it lacks the High Voltage cup!

This Flyback is not available anymore on HR Diemen site, nor is the HV cup, sold separately :(

Do anyone know if it's possible to put in a cup (and its cable) taken from another bad flyback? Are there "special" precautions for this operation?

Thanks very much
 

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Looks like a compression nut where the anode lead goes into the flyback.
Try unscrewing it.
Does the old flyback have the same setup?

Basically what that is is you loosen the nut, strip a little off the anode lead to expose some wire (maybe 1/2"), stick it down in to the new flyback, tighten the nut.
 

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The old fly is similar, but has not the compresion nut. Do you think that using some silicone after tightening the nut just to avoid some arching could be safer?
 
Do you think that using some silicone after tightening the nut just to avoid some arching could be safer?

Wouldn't hurt.

Biggest thing is to measure how much bare wire needs to be exposed in order to fully seat down into the hole.
If you look down into the hole you should see a smaller hole for the stripped section to go down into.
find something of similar diameter to poke down in there and measure to the top of where the nut goes.
Then stick a section of the larger anode wire in the hole and measure the same.
The difference between the two measurements is how much stripped wire needs to be exposed so that it will fully seat down into the smaller hole.
You might want to "tin" the bare wire to stiffen it up and make it easier to poke down into the small hole.

If the stripped end gets fully seated properly then you should only need a small amount of silicone, no need to go hog wild with it.
 
Tug on the old one.....see if it is removable.

Edward

Good point.... a pic of the old one might help.
Some removal HV leads are like a "push-n-lock" thingy rather than the "nut".

Honestly, I've never dealt with one on an arcade monitor, but have seen different variations on rear projection TV's and such. (especially ones with HV splitters and whatnot)
 
The monitor is not accessible ATM, but i can say that the original flyback is the one with two wires going to the cup; also, a common defect of the cup is that with time the plastic it is made of hardens and loose its sealant effect. I would prefer to use another cup then.

Asking for this on an italian forum they told me that the wire should be stripped for 6 mm (this monitor is very common here around)... for future reference ;)

EDIT: just found an old image i took of the chassis. The cup connection is a little bit hidden, but looks tightened to me and not removable

sam0616slim.jpg
 
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Yeah, a bit hard to tell on yours from that pic.
But I found this pic of another chassis with a similar looking flyback setup.
If it's what I think it is..... that little red "ring" pulls up to unlock the anode lead.
Might only pull up a 1/4" or so and then tug on the lead a bit to see if it's loose.
 

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I don't have one here to check it out, but can't you just remove the cup from the old one, and put it on the new one?
 
I don't have one here to check it out, but can't you just remove the cup from the old one, and put it on the new one?

The monitor is not at my place now, so i cannot give it a try now, sorry. Anyhow, a common problem of those cups is that they harden with time and tend to let arcs discharge on the acquadag. Then, i would prefer to use another cup on the new fly
 
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