Arcade Collecting > Pinball

I finally got a pin...RESTORED AND LOVING IT.

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ChadTower:

Yeah.  For every part you order, order 25% more than you need.  Some parts will be bad new.  Others will go bad because you didn't catch the cause, replaced a part, and the new one got fried too.  Some that are good now will die with use before long.  You rarely ever "only need exactly 3 diodes".  If you need 3 now, buy 6.  It SUCKS to have to make another order and pay shipping because you're one resistor short.

shardian:
I was showing a buddy the pin this evening, and decided to pull the bottom connectors on the CPU board to check the pins (I hadn't got around to that yet). OH MY! I can see why the Marvin guide is adamant that you change pins. Most of them are broken, and there is the blue-green battery acid corrosion on most of them. I looked closer under light at the CPU, and there is definitely signs of blue-green corrosion on parts here and there such as the resistor leads, and a little here and there on the board. Still, the damage on the board is not significant, but I'll still be pulling it and doing the vinegar bath this weekend hopefully.
I also was at the mall tonight and stopped in Radioshack to see if there were any parts I could pick up now that I could put to immediate use... :laugh2: :laugh2: They don't have crap.
And of course, here are some pics.

Cosmetically, I couldn't have asked for a better pin for the price. Only two minor wear spots that will be easy to fix. The flaking on the skin of the girls on the backglass isn't all that bad and should be very easy to fix once I match the skin color. I don't know, I think I like the skin disease look. ;)

As you can see, the business end of the playfield is very clean. They say the mechanical parts on gottlieb Sys1's are very durable. We'll see once I get the mess of the electrical figured out.

And check out all of that ORIGINAL documentation. I don't know WTF I was supposed to do with all of those scoring cards back in the day - hand them out or something? ;D

shardian:
Now that you have seen the body, lets take a look under the hood.

Notice the beautiful repair work on the power supply.  The dangling cap is my favorite. ;D The more I think about it, the more I think I'll make a go at a thorough repair job of the PS.

There is much more battery crap on the CPU than I originally took stock of. It is definitely getting a good bath. Can I REALLY put this thing in the dishwasher as I have heard?? Most of the pins in the connectors are broken. If not, they have a good coating of blue crap. This has me kind of worried.

Lastly, the driver board. Isn't it nice how a picture with flash can make things like a burn mark really jump out at you? According to the documentation, that piece is for the kicker coil.

The last two pics are the power board and the sound board. Nothing interesting there.

shardian:
That burn mark had me worried on the driver board, so I pulled the board and tested everything. On the other side, the burn mark was pretty substantial. However, the replacement transistor tested good, so whomever fixed it must have got it - even though their solder skills sucked. All in all, I did have one A13 transistor fail a test. They just drive cpu controlled lights, so I'll just replace that puppy.

A question for the pinheads though. The large transistor on the board is a 2n3055. It tested good at around .6, but occasionally it would test at around .9? I would retest and move around and it would test back at .6 after a bit. Could this be to me just not holding my DMM leads properly, or should I just go ahead and replace the part?

Well I think I've made enough progress tonight. Maybe I should hit the hay while I still have a chance to sleep.

Oh and FYI, I like working on the pin WAY more than working with arcade cabs. Pins are all electrical, and thus, quiet. I can work all night and the wife never hears anything. ;D

shardian:

--- Quote from: menace on August 30, 2007, 05:12:08 pm ---Maybe a look at the driver/main board and order a couple of whatever popular transistors are on there.  Mine were u45's and a13's.  I had to order 10 replacement u45's for the aux lamp board and at least 2 a13's were bad for a couple of playfield lights.   

--- End quote ---

I had an a13 test bad, so I ordered some of those. My board also uses 7 U45's, but mouser.com does not carry them. All of mine tested just fine and are original, but the marvin3m guide says they are prone to failure. Where did you get yours?

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