Lay the watch face down on a soft cloth. Unscrew the four corner screws on the metal backplate. Lift the plate off carefully to avoid losing the tiny black rubber gasket.
Look for the specific jumper pad that is connected with a tiny blob of solder. On most versions of Module 3223, removing the solder from the designated pad unlocks the timer function.
On the circuit board, you will see several jumpers—tiny copper connections labeled with numbers. You are looking for the one that keeps the countdown timer disabled.
🛠️ The Legendary "Hidden Features" Mod (Solder Modification)
: By opening the case and scraping away or desoldering a specific jumper on the PCB, users can activate these "hidden" modes. This suggests that Casio uses the same internal module (Module 3240) across multiple models, simply disabling features via hardware jumpers to differentiate price tiers. Auto-Repeat Function casio w-800h mod
The Ultimate Casio W-800H Modding Guide: Unlock Hidden Features and Upgrade Your Watch
is the restoration of the countdown timer. Casio uses the same internal module for various watches, and in the case of the
The Casio W-800H is a highly sought-after digital watch that has gained a significant following among watch enthusiasts and collectors. One of the key reasons for its popularity is the ability to modify or "mod" the watch to suit individual tastes and preferences. In this article, we will take a closer look at the Casio W-800H mod, exploring its features, benefits, and the various ways in which it can be customized.
Use high-magnification tools, such as a digital microscope or a jeweler's loupe, to inspect the PCB before any interaction. Lay the watch face down on a soft cloth
to cleanly remove the jumper connection to avoid damaging other components. 2. Display & Aesthetic Mods
Use your tweezers to gently lift the white plastic module out of the resin watch case.
Upgrades the cheap resin strap to a durable, comfortable nylon band. Phase 1: Unlocking Hidden Features (Timer & 5 Alarms)
For those interested in exploring watch customization, there are many non-invasive ways to personalize a timepiece, such as swapping the resin strap for a NATO-style nylon strap using specialized lug adapters, or adding screen protectors to prevent scratches during heavy use. These methods allow for a unique look without the high risk of destroying the watch's internal electronics. Share public link Look for the specific jumper pad that is
The W-800H is rated for 100 meters. Once the factory seal is broken, it is very difficult to guarantee the same level of water resistance without professional pressure testing and proper lubrication of the gasket.
The crystal on the W-800H is made of acrylic (plastic), which scratches easily.
The Casio W-800H is a modern reincarnation of the classic Casio F-91W, a watch that has become synonymous with minimalist design and rugged reliability. First released in the late 1980s, the F-91W was a staple of 90s fashion, adorning the wrists of hip-hop legends, tech enthusiasts, and anyone who appreciated a no-frills time-telling device. Fast-forward to the present, and Casio has brought back this iconic design with the W-800H, updating it with modern features while retaining its retro charm.
is unlocking its hidden feature . This watch uses a universal PCB (Module 3239/3240) shared with other models; Casio disables specific functions on the by bridging "jumpers" on the circuit board with solder. Core Feature: Unlocked Countdown Timer