Rob brought me his Tag Heuer Formula 1 CAC1111 for repair. It came as a non runner. It is powered by an ETA G10-711 Quartz movement.
A new battery would not get the watch running again.
I place the watch on my Quartz testing device. No regular pulse is detected, which indicates that the issue is most likely electronic rather than mechanical.
In any case, these G10.711 movements are not serviceable, they cannot be stripped down, inspected, cleaned and lubricated like the higher end ETA quartz movements. They are also relatively inexpensive, so it would cost more to service than to replace the whole movement in this instance.
The movement is removed from the case, and the hands are carefully removed.
A new movement is sourced.
The dial is fitted to the new movement.
Hands are fitted, making sure the 3 chronograph hands are perfectly aligned with the zero markers. The 6’o clock subdial is a running second, so this one just needs aligning with any marker.
I check the water resistance of the case prior to reassembling the watch.
When fitting the bracelet, I notice one of the springbars is smaller than the other one. Sure enough, the thinner one is slightly too loose within the bracelet, which could lead to premature wear of the end link of the bracelet.
I measure the diameter of the correct springbar.
And source the correct springbar.
And here we are, a straightforward job. The watch now has a brand new movement, and a minor snag was fixed along the way.