jamma cab monitor question

GaryMcT

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I have a jamma cab that has a badly screen-burned K7600. I also have a WG D9500 with a brand-new tube. I haven't managed to get the 10-pin connector on the D9500 to do anything other than sync, ie. I get a black image. I've been able to get the VGA connector to work with a JROK Williams board if I give it vertical and horizontal sync via the sideband. What would you do?

1) Buy a new monitor?
2) Find a new tube for the K7600?
3) Use the tube from a D9500 with the K7600 chassic? Is that possible?
4) ???
5) Profit?

Thanks!
Gary

(Cross posted to the local email list. . . sorry!)
 
Hi there- I would first crosscheck the D9500 and K7600 tubes for compatability (sorry I dont know off hand), but you might have a match there.

If not, maybe sell off your bad K7000 for funds towards a new replacment D9500 chassis? If you only need CGA, you might be able to fit a wei-ya 825H1 (around $100), I would test the yoke first or maybe someone else knows off hand or a better replacement suggestion. (I personally haven't had any problems with wei-ya yet but I've heard stories) If I have a good tube around, i try to always try to make use of it rather than footing the fat shipping charges for a new one. Just my thoughts, I'm no guru- good luck
 
Hi there- I would first crosscheck the D9500 and K7600 tubes for compatability (sorry I dont know off hand), but you might have a match there.

If not, maybe sell off your bad K7000 for funds towards a new replacment D9500 chassis? If you only need CGA, you might be able to fit a wei-ya 825H1 (around $100), I would test the yoke first or maybe someone else knows off hand or a better replacement suggestion. (I personally haven't had any problems with wei-ya yet but I've heard stories) If I have a good tube around, i try to always try to make use of it rather than footing the fat shipping charges for a new one. Just my thoughts, I'm no guru- good luck

I don't think the chassis on the d9500 is broken. I have multiple of them and they all have the same behavior. I'm trying to figure out how to get one of them to work now. Apparently you can't use composite sync through the VGA connector on one of these, so I'm trying to use the 10-pin now instead. So far not so good. :)
 
Just curious, what are you testing for signal? jamma pcb? test signal? other? At which resolution? (EDIT: nm just re-read, see you're using the williams board)
 
Last edited:
Just curious, what are you testing for signal? jamma pcb? test signal? other? At which resolution?

I'm testing with a jamma PCB (jrok multiwilliams) that runs the same resolution as the early Williams games. In the case of Defender, it's 292 x 240. . . the others are the same or very similar.

I'm getting the correct refresh rate and syncing, but the image is black.
 
Heres a obvious long shot and my last idea: Screen voltage? I almost pulled my hair out the other day on a monitor after replacing the flyback doing the same symptoms until I realized it never turned up the voltage pot. Doh! (EDIT: wait, you already said you have multiple chassis.. never mind! man im not doing well here, sorry!)
 
I got it working in a hacky way. I'm using the 10-pin connector to send ground and composite sync into the monitor and using the VGA port to send in RGB. That works. I need to figure out why the RGB connectors on the 10-ping aren't working.
 
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