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| Problems with Williams 49-ways, not working in all directions. |
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| Major Rock Hardy:
--- Quote from: quarterback on October 09, 2005, 11:45:01 pm ---It's true, but unfortunately I'm not 100% sure it's the chips themselves. One of the joys chips is outputting 5v no matter whether I go right or left, but this could be because some other link in the chain is 'broken'. The chip may be fine, but the path of 'info' "into" or "out of" the chip might be the problem, and there are a number of other components in that path. --- End quote --- I'm looking at my Midway 49 way stick right now and its PCB looks like a 2-layer, which should be relatively easy to check the continuity of - using a multimeter set on ohms. I would imagine the Williams wouldn't have a much more complicated PCB since the technology is basically the same (from what I understand). That would tell you if any of the PCB traces are just plain broken. If you find any, you can repair the connectivity with a piece of wire soldered between the components that should be connected - but aren't. If you don't find any broken traces you can also look at the inputs of the chip itself. Since one of your sticks has a working X axis you can use that as a basis for determining whether the X axis inputs to the chip on the stick w/ the broken X axis are good or not. If you get to this point, and you can't find anything different on the input side of the chip (what is the part number on this chip on the Williams stick by the way?), then it is probably the chip. Rock |
| quarterback:
--- Quote ---what is the part number on this chip on the Williams stick by the way? --- End quote --- The chip has this printed on top: --- Code: ---Toshiba 8840HB TC4011BP Japan --- End code --- --- Quote from: Major Rock Hardy on October 10, 2005, 02:38:13 pm ---I'm looking at my Midway 49 way stick right now and its PCB looks like a 2-layer, which should be relatively easy to check the continuity of - using a multimeter set on ohms. I would imagine the Williams wouldn't have a much more complicated PCB since the technology is basically the same (from what I understand). --- End quote --- There's an exploded view of the joystick on page 21 of the sinistar manual http://www.arcadedocs.com/vidmanuals/S/Sinistar.pdf And here's a photo of one of my joy's PCB |
| Major Rock Hardy:
your chip is indeed a quad, 2-input nand part: http://pdf.alldatasheet.co.kr/datasheet-pdf/view/31627/TOSHIBA/TC4011BP/datasheet.pdf so pin 14 is VDD, pin 7 is VSS (ground), the rest of the logic should go like this: pin 11 = !(pin 12 & pin 13) pin 10 = !(pin 8 & pin 9) pin 3 = !(pin 2 & pin 1) pin 4 = !(pin 5 & pin 6) hope this helps, Rock |
| madmagician:
not sure if you've noticed this but it looks to me like C2 is missing (upper right corner) |
| RandyT:
--- Quote from: madmagician on October 11, 2005, 04:05:14 pm ---not sure if you've noticed this but it looks to me like C2 is missing (upper right corner) --- End quote --- That's intentional. It's missing on mine too :) RandyT |
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