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.
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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!!
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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.