Rampage Monitor Replacement

adamzero

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Hey guys...

I'm still pretty new to the hobby/religion/lifestyle & I have an issue that I hope I can get some help with.

I have a Rampage I'm fixing up & the monitor is pretty shot... bad burn, blurry/out of focus. I did try adjustments on the controls, no help with the focus.

I see on KLOV that the monitor listed is a WG 19K7000... my monitor (the tube is a philips MVA48ABK05X) doesn't have any WG info listed other than a chassis diagram and a sticker reading WG913776. There are spaces where stickers look to have been removed... but it doesn't say it's a k7000 anywhere. Another site online says it's a "Wells-Gardner 19" Color Dual Sync Horizontal Monitor" ... which, yeah, I guess it is because it has separate sync inputs.

My first attempt was to buy one of those new small CRT-VGA converter boards, which I've used before with success. I took the 2 sync wires and put them together into the converter boards singular "sync" input. But no dice... maybe some green static here and there, but no picture. My cousin, much smarter than I, built me a "sync compositor" board to have the H & V sync signals come in together and then off to the CRT-VGA board which has only 1 sync input... No luck there either. Many hours have been spent trying to figure this monitor out & if it really is just a sync issue.... or if there's something odd about the 19K7000 (if that indeed is what I have & need a replacement for) that has to do with resolution or something beyond me.

Is there a replacement monitor (tube, chassis... complete) out there? I've googled it occasionally since last March, but there isn't anything out there. I'm kind of at a loss & I'd just like to pop something new or refurbished in there and get to playing!
 
Had a similar problem with a Rampage PCB trying to get it to run on a composite sync chassis,spoke to our local man here in Perth (JOMAC) and he uses this to solve the problem,just glue the 7400 upside down on the PCB and wire up as per the drawing or make yourself a daughter board,worked for me
 

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Ok well... I'm still really frustrated. Using the sync compositor board that Gibo provided the design for I was able to finally get a picture that stood still...

but I have the brightness & contrast absolutely cranked for things to show up.

I'm using a new monitor... not sure what the exact model is... but it's brand new.

I tried degaussing it, but no improvement was made. The screen is still really dark/colors are really dark...

downsized_0121112115.jpg

The odd thing is the very bottom and bottom left areas seem to have the colors looking fine, if not close to fine. The rest of the screen, as you can see, is all messed up color-wise. The monitors listed in the Rampage service manual are: 19K4901D, 19K4906D, 19K4951D, and 19K4956B. Does anyone have any ideas here on what is going wrong with this? The game plays fine, sounds fine.
Supposed to look like this:
action_arcade.gif
 
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