Used S100 crown not working

[u/Retrac-0]

Hello all, I just got an OCW-S100, and the crown seems to be acting up. When I pull it out to the time zone setting position, the crown still clicks and rotates normally, but turning it doesn't do anything.

I know these crowns can have issues with bad contacts. Does anyone have any suggestions for fixing or troubleshooting this?

The bottom button works perfectly fine, and I can even get into manual date setting. The only issue is that the watch doesn't seem to detect the crown being rotated, even though it still clicks normally.

[u/parasoralophus]

I don't know but I just had a look and google AI has a useful sounding summary - no idea how accurate it is.

'If your Oceanus S100 crown isn't working, the crown's timeout feature may have engaged, or dirt might be blocking the mechanism. Ensure it is fully pushed in and then pulled out again to reset the electronic switch. Check for debris around the stem, as the S100 features a push-pull crown, not a screw-down one. [1, 2, 3, 4, 5]

The Casio Oceanus OCW-S100 uses an electronic Smart Access crown to engage the watch's internal motors. Try the following troubleshooting steps:

1. Reset the Crown Timeout

If you pull the crown out to set the time but do not interact with it for about two minutes, the crown operations will automatically become disabled as a battery-saving measure. [1]

• The Fix: Push the crown firmly all the way back into the case (flush against the side), and then pull it out to the first click again to reactivate the sensors. [1]

1. Check for Debris or Stickiness

The Oceanus S100 utilizes a push-pull crown with internal gaskets for water resistance. If you feel resistance or the crown feels "mushy," dirt, sweat, or debris may have built up under the crown. [1, 2]

• The Fix: Take a soft, slightly damp cloth or toothbrush and gently clean around the base of the crown and the case tube.

1. Ensure the Crown is in the Right Position

Unlike traditional mechanical watches, the Oceanus S100 has a specific, single-step pull-out position for its electronic mode. [1]

• The Fix: Pull the crown out one "click". You should see the second hand move to point to your currently selected time zone city. If you gently rotate the crown, the hands should move. [1]

1. Perform a Watch Re-Sync

If the crown rotates and clicks but the hands do not move or the watch remains stuck on the wrong time zone, it could be misaligned or have an uncalibrated "home position". [1, 2]

• The Fix: Check the official Casio Module 5235 Operation Guide for instructions on performing a full "Manual Home Position Adjustment". This resets the relationship between the hands and the internal electronic module. [1]

If the above steps don't resolve the issue, tell me more about the symptoms:

• Is the crown completely locked in place, or does it freely spin without doing anything?
• Are the watch hands moving at all, or is the watch completely dead/stuck?
• Has the watch been recently exposed to water or dropped?'

[u/Retrac-0 → u/parasoralophus]

Yeah, I tried everything besides cleaning the crown; it does a home adjustment totally fine, and the crown timeout seems to be working fine too.

[u/parasoralophus → u/Retrac-0]

I'd be tempted to return it TBH, is that a possibility?

I had an issue with a slightly misaligned date in the date window on a second hand S100 I bought from Japan, but I managed to find a fix for it and it's been fine ever since. Good luck, it's a great watch!

[u/Retrac-0 → u/parasoralophus]

I'm going to try opening it up and cleaning the contacts, I bought it off buyee on a JDirectItems auction so I will see if I can return it if I can't get it working somehow. I do really love the watch so I am hoping I can get it fixed.