Alright, so I've spent this week chatting with Nick each night (he in Virginia and I in Michigan). He's done a commendable job of suffering through my ignorance. But tonight, I felt like some pieces began falling into place and the puzzle that is schematics started to reveal itself to me.
I'll use an example of another thing we fixed tonight. This time at the start of our session I told Nick, let me talk through this one on my own and see if I can figure it out myself. He admitted he was hoping I'd say this. My guess is he needed a break from teaching his remedial electronics student. (Actually, Nick has been saintly through this whole process and I can't speak high enough words of praise for his patience and persistence with me.)
So tonight we tackled a problem with the pop bumpers.
swingerPops.jpg
- YELLOW and GREEN pops are labeled, "10 points or 100 when lit."
- Unlit, the YELLOW pops scored the appropriate 10 points when hit.
- Unlit, the GREEN pops scored the appropriate 10 points when hit.
- Lit, the YELLOW pops DID NOT score the appropriate 100 points when hit.
- Lit, the GREEN pops DID NOT score the appropriate 100 points when hit.
- The 100 point center pop DID NOT score the appropriate 100 points when hit.
Nick told me to start with the coil that was having a problem and work backwards from there. So, if you recall the Swinger schematic:
schematicColors.jpg
...and...
Quoted from RyanClaytor:The 6 volt line leads to and powers everything in the green section (lamps, for the most part?), while the 24 volt line leads to and powers everything in the yellow section (coils, for the most part?).
...that means the coil will be found in the 24 volt section. Also, conveniently, pretty much all the coils are located at the top of the 24 volt section, so you can kinda run down a list of all the coils until you find the right one.
Alright, so 100 points are not scoring. That must mean I should look for a 100 point relay of some sort.
I began scanning through the list of coils at the top of the 24 volt section, remembering I should be...
...I came across this section...
schematicColors2.jpg
...where I spotted...
1stPlayer100ptDU.jpg
...which made me think I may have found something. On the contrary, a D.U. turns out to be a "drum unit" which is fancy phrasing for "score reel." Okay, so the "Player 1 100 pt D.U." is not the culprit. I scanned further down the schematic, again...
...until I got around here...
schematicColors3.jpg
...and noticed this...
100ptRelay.jpg
Bingo! < - (That's for you, Nick.) I found it!
Now, what to do with it now that it's been found? Well, after locating the coil (found at the top of the 24 volt section), you begin to work your way down. Since...
and the negative/yellow wire is at the bottom of the 24 volt section, then one of the switches between the coil and the negative/yellow wire is likely the reason for the malfunction.
However, the place I started to get concerned tonight was how to figure out what to do if there is a junction (which looks like this):
junction.gif
The 100pt Relay happens to have a junction between it and the negative/yellow wire. Nick told me to, once again, simply start...
...by following the path of the left most line of continuity, checking the switches along the way to ensure that they are all doing what they're supposed to do (normally open, normally close, and making sure there is DEFLECTION [a bit of movement] when they touch), then moving to the right on the schematic doing the same thing.
The first item I came to when moving downward from the 100 pt relay was a make/break switch (which looks like this):
makeBreak.jpg
...on the Step-Up Relay. After locating said relay, it looked like everything was pretty much doing everything it was supposed to, save for one switch. On the make/break switch, when the make switch was supposed to break it did, in fact, break. However, the separation between the switch contacts was a lot smaller than the other switches. So I used my switch adjustment tool to...well...adjust that switch. Once gapped appropriately, I turned on the machine, tested the aforementioned pop bumpers and they all scored 100 pts appropriately!
That felt pretty good. Especially since Nick did his best to let me figure-out most of it on my own. This schematics-reading thing is pretty empowering, and pretty addictive. I can see why people start hoarding project machines.