How to Replace the Capacitor on a Seiko 5M42A

Written by vlatko kalashnikov
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How to Replace the Capacitor on a Seiko 5M42A
You can easily replace the capacitor on your Seiko Kinetic watch. (Watch image by sarkee from

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.

Skill level:

Things you need

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

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  1. 1

    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.

  2. 2

    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.

  3. 3

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

  4. 4

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

  5. 5

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

  6. 6

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

  7. 7

    Screw the screws securely into place on the capacitor plate.

  8. 8

    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.

  9. 9

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

  10. 10

    Reattach the back plate onto the watch.

Tips and warnings

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

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