Arcade Collecting > Pinball
Allied Leisure, Star Shooter (my first pin)
chopperthedog:
Finally had a chance to hunt down the reason the knocker coil wasn't firing for coin up and free game acknowledgment. Stared at the schematic for a tad and located the transistor that controlled the knocker and coin counter. I "borrowed" the transistor from the coin counter circuit and knocker now fires nice and loud.
good day.
chopperthedog:
Soooooo, I kinda forced myself into doing a board repair for the first time. I "might" have been working on the game and the power "might" have been on and "might" have seen a quick spark while I was adjusting a leaf switch and then noticed 3 lamps on the play field stuck "on". Tried to power cycle the table and the 3 lamps remained stuck. Crap, way to go dumb ass.
Old crappy before pic from early october when I first fcuked it up (I forgot to take a better one before the repair). The green arrows show the 3 stuck lamps.
The wire color groupings from the play field to the edge connector made it easy to get the general idea of where the issue was on the board. At first I was hoping it was just gonna be a couple transistors. NOPE!, I cooked 3 SN75492AN's. While looking at the schematic I saw the diagram for the chip and the pin outs, with my meter I was able to find the specific legs that were locked on.
3 bad chips identified. Not too many options for purchasing these things, but made a purchase for some through a seller on ebay.
Chips removed with no pad or trace damage. When I first mucked it up I didn't have a desoldering station and there was no way I wanted to attempt chip work with my $10 radio shack rubber bulb sucker thingy. I've also read some repair logs on these boards and they talk about how fragile the pads are.
Sockets were installed for the new chips and the issue is FIXED!!!
Been noticing the coils getting weak or just giving up during long periods of heavy use and knew that the 8000uf cap from the 42nd week of 1978 had to finally get replaced, plus R10 wasn't looking so good. Of course it ends up being an odd value that the standard pinball suppliers don't have and got one through mouser.
Close up of R10.
New cap and resistor installed. No slow downs or fatigue when getting hammered now.
Pic of my little bench during chip replacement. Was a good learning experience on many levels. :p
good day.
chopperthedog:
Not much to report, table has been 100% awesome with 467 ticks added to the coin counter since my last post. I have this game and my wall games on coin op and never pull quarters, I pick up rolls of from my bank and use the games as polish piggy banks.
The apron damage finally got to me and I came up with a plan of attack to handle it all in one shot. First thing was to handle the warping, judging by some of the fading on the drop target plastics, this thing sat in the sun somewhere. Used a heat gun carefully to take care of the severe bowing. There were multiple areas where the black ink had been eaten away by the adhesive from pads applied at factory to "protect" scratches in the ink. The adhesive also started doing a number on the actual plexi as well. Removed all glue and damaged surrounding ink, taped it off and sprayed the back black.
Plotted out the exact specs and ordered a new piece that worked perfectly. For future use give your glass guy that pic and tell him "clear, 3/16", tempered, no logo".
The score windows were trashed, thankfully the ink sucked so bad it only took a little alcohol to get the windows clear. I got the idea to pick up a roll of that tail light repair tape. Sh!t worked out perfectly.
I've searched high and low on the interwebz for the score cards and came up dead. Brushed up on my gimp skills and was able to recreate it myself. Font isn't exact, but meh much better than the piss stained looking thing I had been staring at. I found a grainy pic online and was able to create something that looked close to the left card.
Much better looking apron now. Score windows and instruction cards top it off nicely. I also attached the PDF of my score cards for anyone that finds this thread in the future.
good day.
Malenko:
You find and fix the weirdest ---steaming pile of meadow muffin---, and I admire the hell out of you for it.
As always, great job and great documentation.
yotsuya:
Love that pin. I want one.
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