How to Replace the Capacitor on a Seiko 5M42A

Updated July 20, 2017

Did your Seiko Kinetic watch suddenly stop functioning? Do not fret, and do not throw that watch away, because it's likely that you can easily repair it yourself. The Seiko Kinetic series of watches is known to have weak capacitors that become faulty fairly quickly, causing the watch to stop ticking. However, this problem can be easily solved by replacing the capacitor yourself, restoring the watch back to its original working condition.

Pop open the back case of the watch by wedging the toothpick into the crevice made by the back plate and the rest of the watch.

Unscrew the rotor screw by using the 1.2 - 1.4mm screwdriver. Remove the screw along with the rotor and the rotor wheel located directly under the rotor.

Unscrew the capacitor screws with the 1mm screwdriver. Remove the screws, the capacitor plate and the orange insulation.

Use the plastic tweezers to remove the faulty capacitor from the watch.

Mount the new capacitor inside the watch using the plastic tweezers.

Place the new orange insulation on the capacitor. Mount the capacitor plate on top of the insulation.

Screw the screws securely into place on the capacitor plate.

Place the rotor wheel back into its position on the rotor. Make sure it makes contact with the small wheel used for the winding mechanism.

Mount the rotor on top of the rotor wheel and securely screw the rotor screw into place.

Reattach the back plate onto the watch.


Make sure to use plastic tweezers instead of metal ones. Metal tweezers may short out the circuit of the watch.

Things You'll Need

  • Seiko Kinetic capacitor 3023-5MZ
  • Toothpick
  • 1.2 - 1.4mm screwdriver
  • 1mm screwdriver
  • Plastic tweezers
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About the Author

Vlatko Kalashnikov began his writing career in 2008. He has worked as a student editor and a contributor for eHow. Kalashnikov is pursuing a Bachelor of Arts in psychology and a Bachelor of Fine Arts in electronic multimedia at the City College of New York.