OP

Quoted from bdPinball:

Replaced the pins in the power board. I saw something that said the power "unit" was easy to remove, but dAmn! 6 bolts just for the shroud around the transformer, and another 5 maybe to get the rest of it out of there, and finally the 3 to take the Bridge/heat sink off of it mount.
When Inreplace the heat sinks, I am pretty sure o don't have any heat sink compound. Is that a necessity? Will the little bit that's left work?
I wasn't aware of a ground mod for the Bally's- but I've been bout of action for a few years. I know that a gottlieb pracuztically won't run without. Ground mod. But I suppose it makes some sense, I've seen Bally's blow out on a Burnt GI plug a few times.
I got about 5 pins into the 20 pin molex. Methodically piecing back together the wires he had pieces together with that brown ext cord wire. Christ speaker wire even!
Next maybe I'll do some d10 rims, and maybe some stylish white led displays. Possible one of Vid's polished hoops for the horseshoe.
Thanks for your help.

OP

Quoted from bdPinball:

That's what I thought about the orange wires.
Knocker is in the cab.
---
Turn it On am there is an ominous humm from the cabinet. Off with the power.
Only J2 on the rectifier board- voltages are not perfect.
TPs are as follows:
1. 5.4 actual 3.21
2. 230 actual 157
3. 11.9 - 11.6
4. 7.3 - 7
5. 4.3 - 4.65
1 & 2 bother me. 3, 4, and 5 seem okay to me.
I suppose if CPU doesn't get its proper voltage, and won't boot, sound card could make a hum like that. Btw- they humm isn't the humm of a stuck solenoid. I don't hear a pop when I turn it on. I'm familiar with that.
Guess the rectifier board needs some help. If the voltages are dead, it's the Wheatstone? What component cause low voltage?

OP

Quoted from bdPinball:

If you look at my pic of the manual page, it shows pin 13 as being 53. But I'm wondering if you might be right about a mistake. Why can't I find this wire anywhere in head?

OP

Quoted from bdPinball:

Okay- I had things working well- cleaned Playfield replaced nasty/miscolored rubbers, Adjusted some non-making switches.
I think I mentioned a stuck on knocker. Replaced q3 with a TIP102 (man it's nice to still have all These parts laying around so I don't have to wait for them to come In the mail! That was always the worst part about this hobby, and having only one game- nothing to play while waiting for parts)
Things were great for a day. NOW I notice the knocker isn't working again! Grounding the tab doesn't produce a knock.
Schematics show both Q3 (knocker) and Q4 (outhole kicker) share the same U1- a 3081- of which I don't have one. Anyway, since the outhole still works I'm going to bet that U1 is okay- maybe my TIP102 went bad? I see a resistor and a cap in circuit there- something makes me guess it's the TIP102- just because I've seen that component go out more times than I can count.
Ideas?
-BrianDPinball