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Difference Wei-Ya 3129A and 3129D chassis / chassis swap Nanao MS9

Posted: February 10th, 2016, 4:46 pm
by PascalP
Ok, so I ordered a brand new 3129A replacement chassis for my MS9 chassis in my Namco Cyberlead.

Got the package today and on the outer cardboard box is a 3129A marking, but after opening the package and inspection the PCB I noticed there are 3129D markings on it, also upon further inspection of the neckboard, this also says 3129D!

So can anyone explain the real difference here?
I know the 3129A is for 15/24khz MS9 e.g. New Astro City and the 3129D is advertised as the replacement for Tri-Sync from a Blast City.

Re: Difference Wei-Ya 3129A and 3129D chassis

Posted: February 10th, 2016, 5:26 pm
by grantspain
3129B is blast replacement

Re: Difference Wei-Ya 3129A and 3129D chassis

Posted: February 10th, 2016, 5:39 pm
by PascalP
Ok, so what is the 3129D?
Any clues?


Edit:
According to your answer in this topic I should be OK?
http://forum.arcadeotaku.com/viewtopic.php?t=808

Re: Difference Wei-Ya 3129A and 3129D chassis

Posted: February 10th, 2016, 6:09 pm
by grantspain
probably for a flat tube,is the crt socket single or double focus?

Re: Difference Wei-Ya 3129A and 3129D chassis

Posted: February 10th, 2016, 6:21 pm
by PascalP
It has 3 positions for pots on the LOPT, but only 2 are populated.
So single focus adjust and screen adjust I assume?

Re: Difference Wei-Ya 3129A and 3129D chassis

Posted: February 10th, 2016, 6:46 pm
by Brettster
Does it have 1 or 2 pins for the focus on the neck board socket?
The egret 3 with LG/Samsung tube uses a 3129d chassis as I know only too well :lol:

Re: Difference Wei-Ya 3129A and 3129D chassis

Posted: February 10th, 2016, 7:05 pm
by PascalP

Re: Difference Wei-Ya 3129A and 3129D chassis

Posted: February 10th, 2016, 9:48 pm
by PascalP
I gave it a shot and installed the chassis, after turning the cab ON, surprise... NO screen... :(

Double checked every connection, all grounds are connected, the AC gets 110V, also the fuse is OK!
There is no visible neck glow and there is no sound/static coming from the screen.
When I listen closely I do a small 'tick' coming from the chassis every 2 seconds or so, and that's it!

Any tips/advice on how to proceed?

Re: Difference Wei-Ya 3129A and 3129D chassis

Posted: February 10th, 2016, 9:54 pm
by Brettster
Do you have an input source plugged in too? Some chassis do not start up unless there is something plugged into the VGA socket

Re: Difference Wei-Ya 3129A and 3129D chassis

Posted: February 10th, 2016, 10:00 pm
by PascalP
Yeah there is a VGA source, but I think a diode is shorted, check out this video I made where you can see a diode lighting up everytime there is an audible click:

https://youtu.be/PLRcpyoIy4Q


It's the one here visible between the silver heatsink and the 2 gray resistors: (marked D21 on the PCB)

http://s429.photobucket.com/user/peulen ... 5.jpg.html

Re: Difference Wei-Ya 3129A and 3129D chassis

Posted: February 10th, 2016, 10:06 pm
by grantspain
is the solder connection good on that diode
have you read it with a multimeter

Re: Difference Wei-Ya 3129A and 3129D chassis / chassis swap Nanao MS9

Posted: February 11th, 2016, 6:39 am
by PascalP
Will try it tonight.
I found a Rodotron 666A schematic and compare the values with this, 7V DC after the diode.
Will also check the connection and the one-way continuity of the diode.

Re: Difference Wei-Ya 3129A and 3129D chassis / chassis swap Nanao MS9

Posted: February 11th, 2016, 8:00 am
by RMRM
Can i ask where you bought this chassis?

A couple months ago i've speaked with Wei Ya and they've sent me a list of all the available chassis they had, and that model was not on the list.

I think the right replacement for an MS9 (at least trisync) would be the C3129G-X.

Just wanted to share the information.

Re: Difference Wei-Ya 3129A and 3129D chassis / chassis swap Nanao MS9

Posted: February 11th, 2016, 8:09 am
by PascalP
RMRM wrote:Can i ask where you bought this chassis?

A couple months ago i've speaked with Wei Ya and they've sent me a list of all the available chassis they had, and that model was not on the list.

I think the right replacement for an MS9 (at least trisync) would be the C3129G-X.

Just wanted to share the information.
This is the one, only store I could find which still delivered them:

https://www.arcadespareparts.com/wei_ya ... assis.html

Re: Difference Wei-Ya 3129A and 3129D chassis / chassis swap Nanao MS9

Posted: February 11th, 2016, 4:30 pm
by PascalP
Just took out the chassis to check the diode D21, and it has full continuity in both directions...
So yeah, that one is blown.

Re: Difference Wei-Ya 3129A and 3129D chassis / chassis swap Nanao MS9

Posted: February 16th, 2016, 9:52 pm
by sanh43
umm...im a bit off topic here but since were talking wei ya here and all, why not. i just installed a wei ya into my nac. I'm doing this so i can play sfv in it. I'm using an hdmi to vga converter. the thing here is when i power up the console theres a slight delay in the picture popping up compared to when it was the original chassis(was playing sfiv with viletim converter to jamma). best way to describe it is a signal change i guess, and you can hear it firing too, like a flicker.is the wei ya like that? or is it my converter too? if any of you guys can chime in thanks

Re: Difference Wei-Ya 3129A and 3129D chassis / chassis swap Nanao MS9

Posted: February 17th, 2016, 8:27 am
by RMRM
Are you using an Xbox 360?

I do have a Rodotron 666A (it's an equivalent), and when i use an Xbox 360 connected with the official VGA cable, i have no problems at all.

Re: Difference Wei-Ya 3129A and 3129D chassis / chassis swap Nanao MS9

Posted: February 18th, 2016, 1:00 am
by sanh43
unfortunately i don't think sony will ever make an hdmi to vga. the converter i have isn't cheap either, but if anyone knows of one please chime in. thanks

Re: Difference Wei-Ya 3129A and 3129D chassis / chassis swap Nanao MS9

Posted: March 17th, 2016, 11:03 pm
by PascalP
Ok, update:
Chassis is working now!

Finally got the time to replace the shorted diode mentioned before and swap out the chassis again.
Everything fine on the first go!

Now I just need to sort out the geometry as good as possible (especially the lower right corner). But apparently that is a well known issue with this chassis?

Re: Difference Wei-Ya 3129A and 3129D chassis / chassis swap Nanao MS9

Posted: April 3rd, 2019, 5:31 am
by Hackcell
PascalP wrote:
March 17th, 2016, 11:03 MP
Ok, update:
Chassis is working now!

Finally got the time to replace the shorted diode mentioned before and swap out the chassis again.
Everything fine on the first go!

Now I just need to sort out the geometry as good as possible (especially the lower right corner). But apparently that is a well known issue with this chassis?
Hi,

How did it go adjusting the geonmetry? Also, what kind of tube are you using?