Jaeger Memovox - Alarm not working

[Khan]

K911 movement. The alarm is not working unless I push down on the Lever (pointed with red arrow). There is resistance/elasticity in that lever hence its not sitting loose. Does anybody know these movements? 

[AndyGSi]

Does the alarm wind and set correctly?

[Khan]

Yes the alarm crown winds and sets correctly as well as the alarm dial with the arrow moves. But the alarm doesnt ring when the arrow passes the hour hand. 

[Knebo]

Hi @Khan,

some more info would be helpful. Did it work before? Did you service it?

Have a look at the manual for the cal 916 (I'm about to finish working on one). I think the alarm system is very similar to yours.

https://watchguy.co.uk/tmp/JLC 916.pdf

To see more, you need to access it from the dial side and under the calendar works.

Here are a few key screenshots with highlights on the parts that are most likely your problem:

 

 

 

 

...and a picture of it assembled. You can see the "disconnector", which is the part you seem to be pushing down from the train side.

It should normally be released by the two special hour wheel and the unlocking wheel (both in the center).

[AndyGSi]

It's been a while since I've looked at one of these but it sounds like the disconnect spring.

Have you got the dial off as you should get a better view from their.

[Khan]

I recently got it so dont know if it worked before and I haven't serviced it. I have only replaced a broken stem which was sources by K916 so yeah they must have similarities. Very interesting images and appreciate the help and images. I will get back soon with inspection of dial side and share a photo. 

[Knebo]

Good luck.

You can see my full disassembly here (and I'll post the assembly in the next couple of days): 

 

 

 

[Khan]

Thank you so much for the kindness. 

[Khan]

Hi @Knebo

How do you get the alarm disc off? 

[Knebo]

7 hours ago, Khan said:

Hi @Knebo

How do you get the alarm disc off? 

Hey, you just gently pry it off (maybe from two sides at the same time, like with hand removing levers). There's nothing holding it in place except a little friction in the middle. It can be a bit stuck, but it'll come off.