Friday, November 22, 2013

SF2: pretty darn close to playing 100%!

A small flurry of progress with SF2:

I had my local tech in to attach a new 12N10L transistor in the Q3 spot on the driver board.   You might remember that the right slingshot coil had no diode across it, so was frying the Q3 transistor, resulting in the coil staying on.  Luckily I caught it before it burnt.  Popped out the F17 fuse and was still enjoying my game enough.
Now with diode on coil and the transistors arriving from marcospec, he swapped in the board component and voila, that's done.

Geoff, my lovely repair tech, has a great web site up at
I highly recommend him.
Oh hey and he brought old door parts and was able to secure the coin door!  Hurray for it not popping outward from the pressure of the interlock swithc and threatening to totally fall off without the lockdown bar in place.

I also have totally fixed the left VUK.  Previously I had a proper coil put in there so at least it could limp the balls out of the hole.  I also needed to re-affix the mount under the playfield as it was missing many screws.
The final steps was replacing the plunger and spring.  Here is what the old one looked like after I removed it:

so. sad.
Swapping it in was pretty easy.  It involved loosening the hole's switch to get access to the nuts for a plate that held the coil in position, then everything slides out cleanly.
The hardest part was finding the courage to trust the playfield in the upright position.  I didn't find it.  I did the whole repair with one firm hand keeping it vertical.

I also swapped in proper fuses for the few remaining ill-fused stragglers.  Right now the only incorrect fuse is F4, which has a 1/2 instead of 3/8.  Not sweating that one too much, but do still have some 3/8 ones on the way!

I reattached the subwoofer in a test, but it is so BUZZY.  I play my games with the volume somewhat low, so screw it, no sub.

So a few small things remain, but when the biggest issue is that you maybe want to replace the flippers?  NONE TOO SHABBY.

get flipper replacement kit
adjust left extra ball center target
deep clean of playfield, removing all plastics and cleaning the screws + replace upper-playfield rubbers
cleaning the under-playfield troughs
replace playfield glass
get cliffy protectors
Replace car crash flipper rubber + glue car to crash mechanism
replace stargate ramp coils (but not reason to do it yet though)replace upper left flipper solenoid with correct one  (should be A-25959) (have it, no reason to do it yet though)

fix 2 out lights in backbox
secure coin door
solder diode across the right slingshot coil.  Replace Q3 transistor on driver board.
left VUK: new spring, new plunger
get replacement fuses for under the PF
 re-secured VUK mounts to provide extra-strong kicks + added extra screws
installed lower playfield rubbers
installed new power module
replaced Q3 transistor to solve right slingshot issue
reattached ground wires
replaced VUK solenoid to correct one
replaced fuse for stargate ramps
reattach tilt mechanism
bend left playfield bracket back in to proper place
new beer seal
Flipper rubber for Chun Li
Replaced flipper rubbers (except car crash flipper)
Cleaned backbox charring + replaced dead + charred lightbulbs
initial basic playfield cleaning

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