Quoted from PinballGurus:Can anyone verify I’m on the right track with this repair?
You are, but I would start with F601 and D6-D9 area, measure your DC voltage at the cathode of D6 or D7.
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Linked Games
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Congo
Williams, 1995
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pasted_image (resized).pngQuoted from PinballGurus:Does anyone have a good schematic for this board?
I though I posted the schematic for the whole 62V section, is this not the correct one?
Quoted from PinballGurus:Good to know. Crazy. Recommendations?
I prefer the Color LED, I think the dots mode looks best, perhaps its because this is the mode the images were made to be displayed in, plus the LED colors are much more vibrant than the LCD. The entire LED vs LCD basically comes down to personal preference and the game they are used in.
If you are on a budget, you can also so with a monochrome LED display like the ones Stern used in their SAM games and save a couple hundred bucks.
Quoted from PinballGurus:This is the Q10 I’m talking about. It’s the twilight zone repair. Not sure what I’m missing...
Ok, now I'm on board ... you are using troubleshooting advice to repair a board you don't have. Twilight zone (1993) had a dot matrix controller board AND a sound board which is standard for the WPC89 board set. Congo is a WPC95 machine, you have an AV board that has the sound board and display controller board combined. The schematic I linked in post 35 is the entire 62V section all the way from your power transformer to the display.
2 weeks later
Quoted from PinballGurus:I don’t want to make a mistake and tell my guy a color DMD will work only to have it not work
It'll work, the color DMD and/or Color LED only use 12V. You can and should pull both of the high voltage fuses on your DMD driver board when installing this type display.
2 weeks later
Quoted from PinballManiac40:If you load the color file for Congo, it will automatically set it for WPC95 and the correct vertical centering along with it being set for the full color animations.
It should; however, the installation instruction have you perform this step in this order to verify the display is working properly prior to installing new firmware. IMO its worth spending the extra 10 seconds to perform this step.
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