Think about it this way, if you don't have a probe:

When Time Warp boots, the saucers all kick out, to clear any left over balls.

Cut one wire to the saucer coil, and then boot the game.

If the fuse does not blow, then the coil or coil diode is bad.

If the fuse still blows, it's back to the 2 transistors/driver board.

Large driver transistors are TIP102

Small, pre-driver are 2N4401

Replace them both as the TIP blowing will usually stress the 2N4401 and it will be dead or die soon after.

Did you replace the 40 pin connector before you started?

That is job one on those old sys3-7

Did you check the diode on the upper saucer coil with your meter?

https://pinside.com/pinball/forum/topic/vids-guide-to-bulletproofing-williams-system-6

Leave the 2 mounting screws that align with the 40 pin off .

Sometimes they make the rear of the 40pin males touch the bracket and ground out.

Next look at the sound board.

Normally the onboard fuse blow if the rectifier is cooked, so if those are good, then move to the next.

Power off:

Put your meter in diode mode, pull the driver connector from the sound card, and with the black lead on ground of the card, touch the red lead to each of the male pins

So the wire cluster blew the fuse, without the other end being connected to anything?

I only saw this today, but now Andrew is making brand new Time Warp sound cards for $100 shipped.

(fits Contact. Disco Fever, Flash, Phoenix, Omni (shuffle), Stellar Wars, Time Warp, Tri Zone, World Cup )

I have not tried one of these or anything, but there is something you never thought you'd ever see:

https://nvram.weebly.com/new-pcbs.html

20180318-122146 (resized).jpg

Test button on card make the sounds ?

Grounding transistors on driver board make sounds fire?

You've probably noticed that when you connect a piece of wire from ground, to the tabs of the driver transistors, that it makes the coil fire.

Well those last transistors on that driver board fire the sounds on a sys6.

Just touch the wire to the transistor tab for a 1/4 second and the coil or sound will fire.

You can't get every sound manually, because some of them occur when a combination of transistors are fired together.

Does your Flash sound card work?

That is great news^

So now lets verify that the wires actually make it from the MPU to the Soundcard.

Check color codes of each pin