Changing from 24 hr system to 12 hr system

Was this problem answered? If yes, can somebody tell me how. My Casio LA670W is in 24hr format and I want it back on 12hr format. My watch have 3 buttons only. Mode, Start-Stop and Timer

With the time showing, press the lower right button.
This switches between 24 hr and 12 hr every time you press the button.

Actually, the watch has 3 buttons -- "Light" being the 3rd one. Press Mode until a number in the time mode begins flashing. Then press the Light button to get it to the hour indicator. Use the 12-24 Hr button to set it to the current hour. Then press the Light button again to get it to the minutes section. Again, use the 12-24 Hr. Button to set it to the next minute coming up in the current time. Then push the Light button again. This will bring up the seconds indicator. At the precise time the minute you set before begins, hit the 12-24 Hr. button, and the indicator goes back to zero and begins ticing away. Then hit the Mode button again until the watch is in the current time mode. Hope this helps. I use Internet time to set a precise time.

Press and hold the SET button (it will read CHIME with a flashing on or off). Then push the MODE button - the top will be flashing 12-HR or 24-HR. Push the ST/SP button to toggle between the 12-HR to 24-HR reading. Push the MODE button to get to the hour/minute/second/year/mo-day/month/day value you want to change. Push the ST/SP button to increase the value, the RESET button to reduce the value.

Go to:

http://ftp.casio.co.jp/pub/world_manual/wat/en/qw2016.pdf

Full user manual and instructions there to download.

press mode button 3 times untill you get into the time set mode - press lap/reset twice until the hours start to blink.

press start/stop and cycle thru all the modes depending what time you want to set - it will go thru 1, 2, 3, etc thru 24 H then 1, 2, 3, etc thru 12 A then 1, 2, 3, etc thru 12 P - depending on thte time you want to set the A is for AM and the P is for PM

hope this helps

jeff

If your set up is: Top-Left=Indiglo Top-Right=St./Stop Bottom-Left=Mode Bottom-Right=Lap/Reset

Than follow these steps:
1. Press Lap/Reset and hold. You should see the time the alarm was set for.
2. While holding Lap/Reset, press Mode.
3. Let go of all buttons.
4. There you go!

Hope that was a help

NOTE: 12/24 HOUR TIME IS SELECTED BY PRESSING RESET/LIGHT ONLY WHEN THE HOURS MARKER IS 
FLASHING. THE “A” OR “P” WILL DISAPPEAR WHEN THE 
WATCH IS SET TO 24-HOUR TIME. 

try these:

http://www.nsftools.com/misc/TargetDigitalWatchInstructions.jpg