So, I finally found my STTNG Pin that I've wanted for three forevers. I'm excited, it looks nice but it has some gremlins that I'm trying to work out.
On game start, the machine wasn't always launching three balls to the playfield. Often, it would launch one. sometimes, it would launch 3 and one would return from the left VUK area and then drain. Usually, it wouldn't launch three, only two.
Then, during game play, the machine would kick two balls in during play. It was confused by the ball-count in the trough, it seemed. Searching these amazing forums and the internet at a whole, the prevailing bad guy appears to be the trough IR board. So, I put the machine in switch test and pulled the three screws off the trough board.
I looked at it through a camera and all of the IR LED's appeared to be on. So, I shone one of the led's down each hole to check the receiver. All switches cycled on the switch test. Then, I notice all of the sudden, two of the visible LED's on that opto board are no longer on and that board (A GLM board, older one with 1S-X9T-07 printed on it)
So, I do the camera check and now D1, D2, D3 are no longer transmitting. 4,5,6,7 are.
So, I think "strange"/"maybe I fried it somehow?" and go order a new opto and receiver from Marco, which arrived today.
Still touching it with the static bag, I plug it in and notice that on this (supposed to be new..) board (with the older design, large resistors, etc) that LED 6 is not on. So, I sort of mark it up as terrible luck and order another one. (That is on the way, this time another GLM board)
In the process, with this new board installed that works minus LED 6, I start the game and notice the trough solenoid no longer fires, even under test / clr out all balls. But that worked before all this started.
Connection appears to be good. Seems like I'm chasing ghosts. Will the Trough Solenoid fail to fire at all, with a faulty trough board, even in Tests? Didn't seem likely to me but hey, whatever - I'm chasing ghosts, bad-mojo here.
So, I test the fuses on the power /io board. They seem fine. This is the part where I'm afraid you tell me to start by replacing Q54. So, totally hoping there is a fix that doesn't involve me pulling the IO Board and yanking Transistors and other neighboring components. I have such poor luck in that area.
I should mention that, right now, with this newer board installed, if I close the coin door and go to clr-out-balls, the coil on the right bottom subway pops every couple seconds, but nothing else.
Thanks in advance to the awesome Pinsider Community for any help/ advice fellow war stories