20 Most Recent Casio F91W-1 Wrist Watch Questions & Answers

This reset trick works with other Casio Alarm Chrono digital watches, such as my old Model W-720, similar to your F91-W. After the new lithium coil cell is installed and secured with the spring clip, the watch may show random segments in the LCD display or may simply be blank. Insert a sewing needle, paper clip, or blade of a small jeweler's screwdriver into the hole on the back of the movement stamped "AC" (All Clear) to momentarily connect the gold plated contact at the bottom of the hole to the stainless steel battery clip. The battery clip in most such Casio watches is connected to the "+" terminal of the coin cell. This will reset the CMOS chip and it should start up with the watch displaying 12:00 and the date at 1-1. Then, use the control buttons to set the time and date in the normal fashion.

Casio F91W-1... | Answered on Nov 14, 2018

Click on my profile (escapement), then click on Tips and Tricks. There you will find link to all CASIO watch manuals.Rate me, please

Casio F91W-1... | Answered on Sep 28, 2017

Water vapor is getting inside watch and condensing. Need to address any and all seals to make sure that they are air/water tight.

Casio F91W-1... | Answered on Jun 13, 2016

Push the lower left button. The alarm time is showing.
Press the lower right button and it will cycle the hourly beep and alarm on/off.
Press the lower left button to exit when the setting are what you want.

Casio F91W-1... | Answered on Aug 10, 2014

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

Casio F91W-1... | Answered on Oct 22, 2013

first you push the bottem left butten three tmes than push the top left corner to move threw the numbers than use the bottem right butten to change it

Casio F91W-1... | Answered on Nov 25, 2011

you need to look at the user manual that
you can download a soft version of the user manual on below link. .when you open the link just write the 4 digits code on the back side and click searched on the URL below

Hope this helps! Take care and please Remember to rate/vote and
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CASIO Watch User Manual Archives
Use this page to download a copy of CASIO watch manuals in PDF format.
To download a PDF file, enter the four-digit (or three-digit) module number marked on the back cover of your watch.

Casio F91W-1... | Answered on Oct 09, 2011

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