Neo 25 Toei to Nanao ms9

[radiantsvgun]

I’ve had it with this chassis. It blew a fuse and isn’t working, once again. I have a spare ms9 that isn’t being used and wondered if the ms9 would work if I changed the yoke connectors.

I have measured the ohms on both yokes. Red and blue are an exact match. However yellow and green is a different story. On the toei it is 9-9.5; on the nanao ms9 it is a 6.5-7. Is that too far out of spec?

[Wurstkopp]

Correct me if I'm wrong but the Toei has a yoke from a 25" tube and the MS-9 has a yoke from a 29" tube, right?
And this should answer your question btw.

[copados33]

Correct me if I'm wrong but the Toei has a yoke from a 25" tube and the MS-9 has a yoke from a 29" tube, right?
And this should answer your question btw.

That's not entirely correct, Nanao MS8-25FTB, MS8-25FA and MS8-25FAR have 25" tubes/yokes, but all of them are compatible with MS9-29's or even MS8-29 chassis.

[radiantsvgun]

Wanted to follow up, but it did indeed work. I used my spare Nanao ms9-29T and it worked fine, although I had to adjust the H limit. Chassis needs a recap, but it is far more reliable and easier to find than another toei.



I wonder if it would have worked with the ms8-25far I have, but that one still has issues after a recap.

[radiantsvgun]

I am hoping Grant or someone can help me- I have tossed in a recapped chassis and it works, solid image, however I am having H limit problems. I have to max out the H limit pot to get it to fill the screen. Is this just going to be from using the 29 chassis on a 25 yoke?

[grantspain]

there is a h.size jumper on the chassis, what is it set to?
the headers are close to the frequency connector

[radiantsvgun]

there is a h.size jumper on the chassis, what is it set to?
the headers are close to the frequency connector

I was not aware there was such a jumper- I only knew of the pots on the remote board and the one on the chassis. I will investigate this tonight and let you know.

[nem]

It's a small length of wire that plugs into a connector, next to the standard res / medium res connectors. There's two settings, narrow (N) and wide (W).

[radiantsvgun]

I set the jumper to wide and I'm all set.

So the Toei, I noticed one of the transformers went, along with some resistors. I am shelving it, as I have spent too much time, money and effort into that chassis; only for it to continue to fail. The MS9 does not have as vibrant colors/colours as the toei, but its a much sturdier chassis.

[matt5cott]

This is a very interesting thread as I'm potentially about to embark on something similar as I have 2 cabs and I'd like to swap tubes,

Canary -> I have a MS8-25FTB chassis with a Hitachi A59KFS61X10 tube

MVS-u4 -> I have a TOEI TC-HV25LMK chassis with Toshiba A59JMZ90X tube

AFAIK both these combos were common in both U4s and Canaries, presumably I can't just swap the tubes over without doing something, but I'm trying to gauge how much difficulty this will entail

[Alexandre55872]

Correct me if I'm wrong but the Toei has a yoke from a 25" tube and the MS-9 has a yoke from a 29" tube, right?
And this should answer your question btw.

That's not entirely correct, Nanao MS8-25FTB, MS8-25FA and MS8-25FAR have 25" tubes/yokes, but all of them are compatible with MS9-29's or even MS8-29 chassis.

greeting I have a question I have a chassis model MS8 25FAR, is it compatible with a 29 tube? Toshiba

[Buddyc]

Sorry for the massive necrobump…. but I am hoping I can do the same chassis swap since my Toei is acting up. I have a spare MS9 in really good condition that I want to use.

Tube is a Toshiba

D92CC83C-8332-4EF9-8766-DDE7760EEF23.jpeg

Pic of chassis

6DF9AA12-E582-4AE7-83A8-8C7FF0808D91.jpeg

Yoke measures for horizontal

FE5BD52A-5C4B-49B6-994D-F82EBF6A24B9.jpeg

Yoke measures for vertical

C02062EB-C4BC-4D32-989D-CD6A497A62AF.jpeg

Would a MS9 be a good fit for this tube?

[radiantsvgun]

Not sure on those readings, the chassis I had was Toei TC RM251s.

[Buddyc]

Thanks for the reply @radiantsvgun
What kind of tube was in your cab?

Any thoughts @nem @grantspain ?

[matt5cott]

I have exactly the same setup, this TOEI has been causing me headaches for over a year now! (viewtopic.php?f=4&t=42606&p=554690#p554690)

I'm doing one last push on trying to find someone who can work on a TOEI chassis, the only person I know who actually does is Jomac, but he refuses to even answer emails from people outside of Australia nevermind work on their chassis

If I can't find anyone I guess I'll just have to go down this route and replace the chassis with an MS9 too

[nem]

Would a MS9 be a good fit for this tube?

Horizontal is quite a bit off (MS9 is around 0.330mH). I think you could have problems filling the whole picture without geometry issues. If you do try it out, let us know how it goes.

[Buddyc]

But since it’s quite a bit off, do I risk destroying something or is it ok to just run a test?
Risk of anything blowing up?
This is a dedicated MVS cab, so will only run MVS games.

[radiantsvgun]

Thanks for the reply @radiantsvgun
What kind of tube was in your cab?

Any thoughts @nem @grantspain ?

Tube was the standard toshiba thats also in the canary and madonna.

On some games I did have H size issues; supposedly there are resistors you can change but its out of my area of expertise. I've often wondered if a ms8-25 or a ms8-29 would be a better fit, but at the time I didn't have either chassis on hand.

[Buddyc]

I guess MS8 would be a better fit, but it’s also much more of a hassle to calibrate.
Do you remember what kind of PCB’ that had H.size issues? Not full picture or crazy geometry issues with exploding HOT?

[geldra]

Sorry, can’t add anything to the convo other than I’m in the same boat. Though I have a Canary with a Nanao rather than Toei chassis. But the tube is burned to flip. I’ve procured a different tube but I believe it came from a Toei chassis pairing.