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MS-2930 - 15hz horizontal width?

FrAshi

FrAshi

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Blast City with Nanao MS-2930.

In 15hz mode (using a cps2 multi), I have about 2 inches on the left and right. I’ve read something about a switch on the chassis to go wide... anyone know about this? I’ve messed with most of the adjustments on chassis and it’s helped with picture quality and curvature but I can’t seem to figure out how to get any more horizontal width.
 

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Wow, I had no idea! And I thought I knew this chassis inside out.

I stand corrected then!

Honestly, I think it would be there more for adjusting s-correction (horizontal linearity) than actual width, like it does on a MS9, but if it works, it works.
 
The only chassis I’m familiar with is the K7000 so this is a new beast for me! I’ve got the control board horizontal length and HSL cranked, with the jumper switched to wide, and still an inch on both sides isnt filled, but it definitely improved things in 15khz mode. I guess caps are next but I haven’t learned that skill set yet, fairy new to all of this. Thanks again for your response!

Heres where she’s at now:
A22D7F76-4742-44F6-8E3B-FEAF2A510E5B.jpeg
 
That's not normal. I haven't had any issues with getting CPS2 to show full screen on a MS2930.
 
I swapped in an MS2931 on my Windy 2 and had the same issue where I couldn't fill the horizontal. I had to adjust (very very slowly mind you) the HV pot on the board. Not sure if it is the same on the 2930 but I figure I would put it out there since the 2931 is similar.

I am by no means a monitor expert so please do your research before adjusting.
 
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statix138 said:
I swapped in an MS2931 on my Windy 2 and had the same issue where I couldn't fill the horizontal.
Click to expand...

That's different, because you paired the chassis with a yoke that's not the original one.

But you're right, it could possibly be a low B+. I think that's more likely than caps. I think B+ is supposed to be 180VDC. According to grant, you're supposed to measure the voltage at the fuse near the PCB for HV regulation.
 
Adding to this thread for future 2930 knowledge. I had this similar issue but it was AFTER doing a full cap kit.

Prior to the cap kit I was able to extend the image well beyond the visible range. After I was about 1” on each side available. I changed the jumper to wide, increased the hsl pot. I then verified the b+ it was at 178 or so. Adjusting to 180 provided no movement.

After researching and rechecking my work I consulted a fellow peer and he mentioned adjusting the hv adj pot. This is glued. Increasing the pot in tiny increments reduced the image. Decreasing increased the image to normal width and I was back to an useable baseline.

I would not go hog wild on this pot without an hv probe.
 
Could somebody explain, how to connect the ms 2930 to the Nanao tube? Background info: I have importet a Sega Blast City from JCL Games in China (great service by the way), and they have puttet the chassis seperatly for the shipment. Thats really cool, but i have no experience with those monitors at all, and i dont know, what cable to connect to what on the mainboard. Any idea?
If im connecting something wrong, could i destroy something?
 
Sure what questions? Id go ahead and take pictures to be clear. I just completely tore down one and documented everything
 
Your missing the neckboard ground wire. It’s where that metal post is.

It will come from the bottom front area of the tube and is connected to the dag wire. The yoke connectors are written in the correct orientation on the board silkscreen.

Your other connections looked fine. But was hard to see right side of board. There also are two grounds. One on back middle and back left. Your back left one looks off. Its next to degauss.
 
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Your pictures also don't show the vertical yoke connector or the remote cable. Make sure those are connected too.

ms2930_chassis.jpg


Red circle for the yoke and remote, and green circle for the dag wire.
 
Hm, i just have found one black cable, which ive coonected to the mainboard. What iam most afrait of, is the red-blue cable. Dont know, if this is right or contra connected.
 
The picture will just be mirrored if you mess up the orientation.

Darkominator said:
Hm, i just have found one black cable, which ive coonected to the mainboard.
Click to expand...

Does the black cable come from below the tube? If so, that should be connected to the neck board.
 
Here is back left connections and grounds. Seems like you almost have everything
 

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No words, my friends - its working!!! But, i am a bit angry about JCL Games: There were no grounding cables, thank god you explained to me, where to put them. Other big issue: We european know, that whatever electronics we buy from Japan, that we always need a step down converter (we have 220V and not 110V). Not an issue for americans, but for us definetly is. And guess what, JCL changed the power supply insinde the cab. Thats cool, nice, yes - but they have not told me that.
Anyway, i love the sega blast city and the picture of the Nanao. But what is that for an ugly brown spot on the left side of the monitor. Can that be adjustet?
working.jpg
SCREEEN.jpg
 
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