Hey all,
I'm trying to troubleshoot a new issue on my Big Guns. The UR flipper has become very weak. It powers up with some modicum of strength, but it eventually becomes so weak that the flipper doesn't even fully flip. You can also hear a buzz/hum when this happens. See this video for an example:
https://photos.app.goo.gl/WmnwnGFVSkNpMnBL6
What I've tested thus far:
- The EOS switch seems to be adjusted fine - see photos for details. Contacts are made/unmade when appropriate.
- There is no resistance when manually plunging the crank assembly and I rebuilt the flipper (new crank assembly, coil sleeve and stop) a year ago. The game gets only a few plays a day. This leads me to believe it is not a mechanical issue.
- Voltages are suspicious on the left lug of the coil when engaged. Normal (open circuit) voltage is 71.6-71.91v, but closed it is coming in at 0.16-0.18v. This definitely seems out of line compared to the other flippers.
I'm curious if this might be a faulty diode or capacitor? Any ideas on what to try next?
IMG_20200515_192936 (resized).jpgIMG_20200515_192950 (resized).jpg