I'm still a novice at this, so I may use wrong terms when describing the issue. I've the GNR pin (my first & only one) for a little over a year and have had a recurring problem that is driving me crazy.
I've been trying to do more research on the web for the last few days, but haven't come across anything definitive that helped me - I've seen a couple threads on boards, but no one that posted the exact solution to what I'm looking for.
I have the original wire form set (black) that dumps the balls up at the top of the playfield at the JAM lanes. I've read where others had issues with the balls not making it up the ramp from the initial launch...I've never had that problem and I've had the machine for over a year now (this current problem has existed a while, but I'm just now getting around to trying to fix it).
The issue I have is happens when I land a ball in the right hole to add a band member, the VUK activates (seems like it has plenty of power b/c it always makes it up the wireform to land on the shooter lane wireform). However, the ball has a tendency to not roll around the corner to the left - it will go to the right and roll back down into the shooter lane. It will get relaunched automatically and travel around the shooter lane and back into play with no problems. This isn't an issue until the sixth band member is added and multiball begins. The initial ball ends up meeting the first of the multiballs and then it jams the whole mess up. Sometimes it seems like its the alignment of the vertical wireform b/c the ball will hit on of the too small peg like extensions (circled in yellow in the last pic) on the upper portion of the shooter line where it opens up to receive the ball, sometimes it just seems like an elevation deal of the shooter lane.
I've tried adjusting the shooter lane ramp up and down in the slot at the rear of the playfield (circled in red in the last pic), but it doesn't seem to make much of adifference. It is inconsistent in performance whether it is at the top, middle, or bottom of the slot. I had a guy come over yesterday that repairs machines (he fixed some lighting issues I had). He tinkered with it a bit, but was also out of ideas. I the service bulletins #60, 63, and 64 that talked about drilling a hole to lower the elevation of the shooter lane and other issues - I guess that was kind of a last resort for me. I was also wary of that since it seemed like a solution for a different problem.
I'm open to any suggestions out there - would like to hear from other GNR owners to know if they have had this issue and what they did to fix it. Thank you.
Here are some pics and videos of the problem. I can easily take other pics/videos if there is something in particular that would help: