Lol I’m sorry I do scribble but In essence the final drive gear that drives the arm that shifts had a tooth broken off, I’m not sure if this was my girlfriend frantically shifting without pedaling or something like that. She honestly doesn’t know yet how to shift because she is new to cycling.
For this problem you need to have a derailleur that is stuck in a biggest or smallest gear and still makes noise when you shift, or a rear derailleur that stops in a certain gear, for example 1-5 works but then 5-6 is a green flash and some noise but does not actually make the shift. If you diagnose any of those this might help.
But since that shifter arm only moves about 60° or so, I was able to take the derailleur cage off, then move the arm 120° around and then go in the app. Now here is where it gets sort of tricky. If it’s stuck in the smallest sprocket follow 1 if in largest follow 2.
1. Go to the rear derailleur in the app, then click calibrate, it will ask if you are in the 6th sprocket which you need to answer with “yes” ( even though you are not). This will offset the zero and will allow you to shift down 5-6 times (11-12 speed). Repeat this step until the arm has come around anbout 120° and you can mount the cage back on.
2. Go to the rear derailleur in the app, then click calibrate, it will ask if you are in the 6th sprocket which you need to answer “yes” ( even though you are not). This will offset the zero and will allow you to shift up 5-6 times (11-12 speed). Repeat this step until the arm has come around about 120 ° and you can mount the cage back on.
