Cornwall, PE
Very nice, and a good question by MustangPaul. How will you keep them from scratching?
Quoted from MustangPaul:They look great, I hope they don't get scratched up.
(Topic ID: 58120)
Linked Games
Space Station
Williams, 1987
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1 month later
I believe there is one fuse under the playfield,
left side.
Quoted from heni1977:I don think Space Station has any under the PF. Most should be in the head unit, back box. People call them different things! Watch some videos on DMM testing will help with all those little capacitor, diodes, transistors. Should be something on pinside somewhere too.
4 months later
Hi guys,
Working on a SS for what it seems like forever. The board that came with it had battery corrosion, and I just couldn't get it to work consistently so I found a used board with no corrosion. It boots fine and plays a game fine, all is good except for some lighting issues.
For columns 5, 6, 7 & 8 of the lamp matrix, each light in the 4 columns light at the same time for each respective row. See the colour coded sheet I made. For each colour, if one of those switches is activated all four lights in the row come on. Hopefully this makes sense.
I have never had to track down a lamp matrix issue before, so hoping someone in the group will be able to point me in the right direction to start.
IMG_20180630_0859584(1) (resized).jpgI expect 46, 47 & 48 all fall in the same boat, I wasn't exactly sure what those lights referred to (or I just missed them). Everything else is too consistent for them not to be. I will run some of those tests later today and see what I find. Thanks.
Quoted from ajfclark:grumpy might be able to give some more experienced specific guidance, but to me that still sounds like a board issue, given that the commonality between those is U52, except that you haven't coloured the 3 lamps in the insert, 46, 47 and 48. Do they not light? If they don't light like the rest, it probably isn't an MPU issue.
There was no continuity on the pins.
So, testing u52: with docking w/l right (34) on lamp test, here is what I get on a logic probe:
1 - all 3 lights lit
2 - high
3 - low/ pulse lit
4 - all 3 lights lit
5 - high
6 - low / pulse lit
7 - low
8 - low/ pulse lit
9 - all 3 lit
10 - high
11 - low / pulse lit
12 - all 3 lit
13 - high
14 - high
Thoughts?
Quoted from ajfclark:I'd check the MPU side of things by going in to single lamp test mode, selecting one of the problematic lamps and checking the voltages on pins 3 6 8 and 11 of U52. If they are all high, I'd check the remain pins in pairs 1&2, 4&5, 9&10, 12&13. If they are also high, the problem is further upstream (U54?).
Yes they are LEDs. Why would that make a difference?
Quoted from ajfclark:Oh, are they LEDs?
I don't think that is the issue, there is some ghosting, but these are fully on. This didn't happen with my previous board when I had it working.
Quoted from ajfclark:LEDs turn on at a much lower voltage than incandescent bulbs so you can get ghosting with LEDs that you wouldn't see with normal #44 or #47 bulbs. Sometimes due to bugs in the driver code. They won't be fully on, but they won't be fully off either.
Special,
dock w/l (in the shuttle)
Relaunch when lit
See pic.
Quoted from GRUMPY:Which lamp(s) come on during this test.
IMG_20180702_0800180 (resized).jpgSo, maybe ajfclark is on to something with the LEDs. I swapped out all of the LEDs, almost all of the issues went away. Now I only have a few instances where this is happening - with the wheel lights and the USA lights. Everything else seems to be fine. I had seen ghosting before, but these were full brightness - and it hadn't happened with the previous board.
Does this help understand what is happening? It is quite playable now, but if there is something not workingproperly, I would rather make sure it is fixed.
Quoted from jedi42:I don't think that is the issue, there is some ghosting, but these are fully on. This didn't happen with my previous board when I had it working.
So, test all the 42s? If it is just leakage, would I be able to tell if one or more of them are an issue?
Quoted from GRUMPY:Maybe some leakage on some TIP42s causing the Leds to light fairly bright but not fully on.
None of the transistors seemed to be touching. No other progress made, however haven't spent much time on it with the nice weather. Still haven't tested the tip42s, but not really sure what I am looking for in the test, as they are working, just with some leakage.
Quoted from ajfclark:I had another thought on this. If the tabs on the transistors Q52, Q54, Q56 and Q58 were touching... Actually it would still happen with incandescents if that was the issue...
Any progress though?
1 month later
I had the exact same propblem as you, and once I replaced the motor it was 100%. Expensive repair but worth it.
Quoted from midcoastsurf:Hmmm, you are right. It turns clockwise and overshoots the alignment. If I turn the game off and on again, it aligns itself by turning counter-clockwise. I did clean both optos with a QTip and rubbing alcohol. Is it possible to replace the gears in the gear box or do I need to buy this whole assembly?
ebay.com link » Williams Space Station Pinball Machine Space Station Motor 14 7941 2 New
1 month later
Would like to see a picture of that.
Quoted from MustangPaul:I put 4 double spot lights on mine, makes a BIG difference.
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