Well thanks to Pinsiders I've got the Williams Cyclone up and working pretty good. The game is playable to a point. Scoring works fine, GI's work fine, you can play it but a few things still not working. The Bottom Jet Bumper, both Left and Right Slings, Boomerang, and Big Kick still do not work. All fuses checked, all transistors check, done every test you could think of. Here is the catch, about a month ago everything played fine, now these four items are not working. Checked voltage to Jet Bumpers they all read the same. Checked voltage to the other items they are all low. Have correct voltage coming off the power supply. Help!!!

Op didn't mention the upper 2 pops which are also special

Left and Right pops work fine.

So, lets start with basics again: if you ground the tab of the transistor for those five solenoids, do they fire? And to confirm, these are solenoids 03A, 04A, 18, 20, and 21 in the solenoid table?

O3A does not fire
04A does not fire
18 does not fire
20 does not fire
21 - fires

Are the flashers at 03C and 04C (top mid & L Eye, Cats & lower fireworks) working properly?
Yes

Bump for help

mskoemon
Getting the low voltage at the coils

Grumpy
I will check both those tomorrow.

Grumpy
Both boards look good, no cracks on solder joints to head pins. Voltage at coils are all around 2 -3 volts tested in attract mode.

Grumpy,

Are you talking about W1,W3,and W4? the manual says these are Zero ohm 1/4watt resistors. But on the board these are jumper wires.

Grumpy,

I final got the pics attached. Hope the help.

Kickout

IMG_1658 (resized).JPG

IMG_1659 (resized).JPG

IMG_1660 (resized).JPG

Yes, check F4, replaced it with a new fuse, pin starts. Ball Shooter Kick Big, and Boomerang on "A" side do not work. Left and Right Slings and Bottom Jet Bumper do not work. Everything else works.

Grumpy,
When I start the pin the A/C relay clicks on and off over and over. When I did this test:
To test the solenoid A/C select relay. take your aligator test wire and connect it to the metal tab on transistor Q8 (Big Guns or later). Then with the game on and in attract or diagnostic mode, touch the other end of the aligator clip to the ground strap in the backbox. You should hear the A/C select relay click on and off on the Auxiliary power driver board. It stops clicking when I touch ground. This is just the opposite of what it say should happen. Am I looking at a bad A/C relay?

Grumpy

With J12 on the APS disconnected F4 measure good on both sides of the fuse. Plug in J12 and F4 blows. Would you recommend disconnecting the non working coils and then reconnect one at a time. Would I be able to find the bad one that way? Or could I put a jumper from each pin on J12 to it matching connector and test that way?

I tested all of the Tips and all gave identical readings.

Fuse does not blow.

I did check all tips to ground. The Bottom Jet Bumper Q77 fired when tested, but not working in game play. The Right and Left Slings did not fire Q69 and Q71. The Boomerang Q24 did not fire. The Ball Shooter Kickbig Q32 did not fire.Have a bigger issue now, U50 on the CPU started smoking. Turn the pin off right away. Going to pull the board and bench test U50, and see if there is any damage to the back of the board.

You are correct the original problem is most likely connected to U50. I am going to start tracking and testing items connected directly to U50