Question about Casio F91W-1 Wrist Watch
When I remove old battery and put new one, nothing happened? Maybe I need to reset watch with AC point, but where to find this point..
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.
Posted on Oct 29, 2008
Thankssssss a lot! You saved my old Casio!
Posted on Nov 14, 2018
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Posted on Jan 02, 2017
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