Advice: Repair chassis or find new monitor?

[simo1412]

Hey all,

As per title, after some advice.

Turned on my MK cabinet today and I've got vertical collapse, which from searching the forum I understand is chassis related.
However, the monitor is a 25" 59cm Orion which Jomac has posted on these forums is a POS, which was recalled shortly after it was originally produced.

So, should I send the chassis to be repaired or try to get a old of a 59cm tube and then get a universal chassis from Jomac?

I'm thinking the second one is a better option if I can find a tube.

Cheers

[Arcade King]

Have you measured the yoke? If the tube is ok Jomac will sort it

[namastepat]

It's gonna be difficult to find a 59cm tube these days, they were a fairly uncommon tube size to begin with.

I'd message Joey and ask him about repairs. I assume the chassis is a Kortek paired with the Orion tube? It's true, they are not great monitors, but if the picture was OK to begin with, it's likely cheaper and easier to just get the chassis repaired.

[Arcade King]

I remember Joey telling me years back those 25"s used in those cabs were known to fail....I use to have one.
Amazing there's any still working if that's the case.

[simo1412]

Have you measured the yoke? If the tube is ok Jomac will sort it

No I haven't measured the yoke. Don't have any real idea about monitors/chassis etc. I'll have to read through some more posts to figure that out.

[simo1412]

It's gonna be difficult to find a 59cm tube these days, they were a fairly uncommon tube size to begin with.

I'd message Joey and ask him about repairs. I assume the chassis is a Kortek paired with the Orion tube? It's true, they are not great monitors, but if the picture was OK to begin with, it's likely cheaper and easier to just get the chassis repaired.

Yes, I've been keeping an eye out for a 59cm for a few months but seems it will be a challenge. I've got a NEC 63cm TV under the house, there was a 59cm on Gumtree on the 30th December but missed it unfortunately.

Yep, it's the Kortek with the Orion. The picture was dark but ok.

[simo1412]

I remember Joey telling me years back those 25"s used in those cabs were known to fail....I use to have one.
Amazing there's any still working if that's the case.

Only kind of working now!

[namastepat]

Yes, I've been keeping an eye out for a 59cm for a few months but seems it will be a challenge. I've got a NEC 63cm TV under the house, there was a 59cm on Gumtree on the 30th December but missed it unfortunately.

Yep, it's the Kortek with the Orion. The picture was dark but ok.

Those NEC 26 inch tubes are bloody beautiful, I have one in a cabinet myself. If you can retrofit that into the cab, I'd do it. It shouldn't be too difficult, will likely just require some new mounting holes drilled and maybe a small section cut out of the monitor mount. Then get a universal chassis and adjust the image size so that it fits the 25 inch bezel.

[simo1412]

Have you measured the yoke? If the tube is ok Jomac will sort it

Hey, I've measured the yoke now. Resistance across the Yellow and Green was 6.6 ohms, across Red and Blue 1.5 ohms. That's in a normal range right?

Still torn, anyone know if fitting a 26 inch tube into the 25 inch MK cabinet is likely to work?

[namastepat]

Hey, I've measured the yoke now. Resistance across the Yellow and Green was 6.6 ohms, across Red and Blue 1.5 ohms. That's in a normal range right?

Still torn, anyone know if fitting a 26 inch tube into the 25 inch MK cabinet is likely to work?

Yeah, that's a relatively normal reading for a tube, so it likely means the tube is fine. I can guarantee you that if you manage to get that NEC tube in there and get a good universal chassis on it, it will make your Kortek/Orion combo look like a steaming turd. My very first machine had a Kortek/Zenith combo, I could not believe the difference when I dropped the 63cm NEC in there and put in a Joey chassis. It is a thing of bloody beauty.

[simo1412]

Thank you to namastepat andArcade King for the advice with this one and Jomac for supplying a new chassis. (And answering my questions)

Jomac confirmed that the tube was the model number that had been recalled many years ago, so it made sense to swap it out.

I got the 63" NEC tube in there with a bit of work with the jigsaw to make the frame larger and moved the bolt/plug things and it went in ok. Will have to drop it down a cm or 2 to fit the glass again, but that's a job for another time.

Big improvement in colour, brightness etc. which has been good. Has barrel distortion I can't eliminate completely, even with the pincushion adjustment turned up all the way to try and combat that, but regardless of that it's a noticeable improvement over the old monitor.

Thanks again for the advice.

[Arcade King]

Thanks for the follow up. A lot of people don't do that which is a shame.

[namastepat]

Good outcome, although that barrel distortion is worse than it should be. Have you spoken to Joey about that? He might have some advice for how to eliminate it. What happens when you adjust the pin cushion? Is the picture you have there as good as you can make it? You've also got your brightness too high. See how you can see blue in your blacks? Turn down the brightness pot (or the blue cut off and gains) to eliminate that blue.

If you were local, I would offer to drop around and do some monitor adjustment, it's totally my jam (pun intended)

[iborg]

Just my two cents worth. I had the same issue which Jomac managed to fix.

[namastepat]

Yeah, Joey can often make small changes on the chassis to fix stuff like that, depends on the tube and the chassis. What type of chassis is it? Wei-Ya? I don't think Joey can get the Sharp Image ones anymore, they were awesome.