Replaced the bad resistors/capacitors on the Solenoid Driver board last night -- went to sleep around 1AM or so. I was past the point of taking pictures, nothing you have not already seen anyway but I did learn a few things. I was using the PinWiki Test Point Voltage Ranges and was struggling because several of mine were not spot on. Some help from fellow pinsiders (Thanks Quench and WireDoug ) taught me that my readings may not always fall into the published norms. Test Point 5 on the SDB was reading 17V, PinWiki's range was about 12V. Test Points 1 and 3 were reading at 5V, so the incoming voltage(which I thought was too high) was being filtered/stored (and elevated) by the C23 Capacitor as it should have been. The 5V was the important number, and I was right there.
I also thought SDB Test Point 2 was to be at 190V. I was getting a reading of 175-180V (give or take an adjustment with the potentiometer) and thought I was going to be too low. Reading the archives told me that lower than 190V is ok -- this is to be the display power and apparently sometimes a little less juice is preferred to prevent burning up the display units prematurely.
A lot of that is probably common knowledge for most, but this has been quite the learning curve for me. I am writing out my experience just in case the next me comes along -- maybe it will help someone going thru the same process with their first machine. Of course if anything I have written is out of line please do correct me.
After the todays chores I placed the boards in their places in the back box, set the switches on the MPU (New Alltek), held my breath, and turned on the machine.
No smoke, no fire, all the blinky lights did what they were supposed to do. So far so good.
I swung the display panel over and quickly saw I had lit displays. Success!!
I'm sure the displays were trying to tell me there is an issue somewhere (like the MPU is set incorrectly, the game is in audit mode, or something else -- like the playfield is missing. . . ) but for now I am just happy they are lit. I did not know if any of them would even light prior to today so I will take this as a win.
More attention coming to the playfield next. It is due for a sand and third coat of clear; hope to be posting about that soon.