Casio 3495 G-Shock Men's watch
This wrist watch is very popular as it receives the current time via radio waves. In this case it was set to receive DCF77 but can also do JJY, BPC and WWVB for Japan, China and USA respectively.
The watch worked find but did not receive the time signal anymore despite it still being under warrenty. Casio wanted 50 Euros for repair! Not worth it.
The case was removed from the back of the watch in a watch vice.
After removing the four screws, the back came off and looked like this:
A view under the back of the watched showed two electrodes:
On a closer look at the back of the case where the electrodes touch, I could make out corrosion of some kind.
The case was cleaned using Napthalene, being careful not to touch the rubber seals.
After that, the time signal was received and the watch is back in working order.
