Sunday September 8, 2013

Casio Wave Ceptor 2556 Battery Replacement - Not For the Mechanically Challenged

Casio2556front

I have a Casio Wave Ceptor 2556 LCD watch. It's a great watch and, if I don't use the backlight or alarm often, runs for years before needing a battery change. In fact, yesterday was the first time the battery died since I've had the watch. I assumed that replacement would be a fairly simple process. It wasn't.

For anyone with a similar watch who might be searching (as I did, futilely) for aid and assistance, here are some notes and pictures.


Disclaimer

Casio does not recommend that people replace batteries themselves. If you break the watch while replacing the battery, that's your responsibility. Casio2556back

Tools

Examine the back of the watch. It shows the model number and name: Casio wave ceptor 2256 WV-57H. Note the four small screws. Whereas many watch backs need to be pried off, the Casio requires a jeweler's micro screwdriver, Phillips head.

You'll also need a small bowl, a forceps (or tweezers), and a good source of light.

Steps

Steps first; more photos follow.

1. Lay the watch face down on a table top. You may want to place it on a soft cloth or towel.

2. Carefully remove the four screws and place them in a small bowl or cup. You do not want to accidentally lose a screw. (If you're tempted to just lay the screws on the table, stop reading now because I don't want to talk to you. If you keep reading, don't blame me if you lose a screw.)

3. From this point on, keep the watch face down. Do NOT turn it over; there are tiny little springs which can fall out and be lost forever if you turn the watch over when the back is off.

4. If the rubber gasket comes loose, put it in the bowl with the screws.

5. Examine the back of the watch. You can now see the battery, held in place by a circular "retainer clip" of thin metal. If you're like me, no amount of staring at this clip will tell you where it's hinged (if it is) and where or how it's supposed to open. The Casio User's Manual provides no assistance.

I turned to the web and, after widening the search to digital watch battery replacement metal clip finally found a small number of photographs that showed me the trick.

The "hinge" is at the upper edge of the retainer clip (toward the top of the watch). There is a "clasp" at the bottom.

6. Gently insert a push pin tip, forceps tip, or the blade of your smallest flat-blade micro screwdriver into the space between the "clasp" of the retainer clip and the plastic wall of the inner watch housing and lever upward carefully. The retainer does not lift all the way up; loosen it enough that the battery can be removed (by sliding it out from below the retainer clip).

7. Gently slide out the old battery. Slide in the new battery, with the (labeled, positive) back facing out. Avoid touching the new battery with your fingers; use a piece of tissue, gloves, etc. Do NOT use a pair of tweezers, lest you short out the battery.

8. Press the retainer clip back in place. Press down on the clasp at the bottom until it snaps into place. You may need to use the back of your screwdriver to press the clasp until it "clicks".

9. Reset the "All Clear" (AC). Inside the back panel of the watch is a sticker that reads "After battery replacement, contact AC with terminal (-) using tweezers".

The AC contact point is marked with an arrow; it's a small gold-plated circle on the circuit board of the watch, in a "hole" at the lower left as you look at the battery. This contact needs to be connected to the stainless steel area around the battery clip which is labeled with (-), another arrow and a circle.

If you are not comfortable using tweezers, you can use a thin wire, connecting one end of the wire to the AC contact point and the other to the circle marked (-).

10. Pick up the watch, keeping it level so that the springs do not fall out. Peek at the watch's face. It should now be reading 1/1 12:00.

11. Lay the watch back on the table. Replace the gasket, if it came out during the battery-replacement procedure. Note that a small rectangular notch on the left side of the gasket's groove matches a small rectangular bump in the gasket.

12. Press the back onto the watch and re-seat the screws. They only need to be snug; do NOT over-tighten.

13. Reset your location and time.


References

  • Replacing the battery in a Casio Databank 150 watch - this was the only remotely close article I found. It had a photo of a similar metal "battery retainer" clip. Every other article I found just said "Remove the metal retainer clip over the battery" as if that was simple to figure out! The "retainer" on a Casio Databank isn't the same, but the latch mechanism is very similar.

  • Reset the AC

  • Photos

    Lay the watch face down on a table top. Carefully remove the four screws.

    back of watch

    If the rubber gasket comes loose, put it in the bowl with the screws.

    gasket


    Examine the back of the watch. You can now see the battery, held in place by a circular "retainer clip" of thin metal.


    battery retainer clip

    clasp - closeup view

    clasp - closeup view


    Gently insert a push pin tip, forceps tip, or the blade of your smallest flat-blade micro screwdriver into the space between the "clasp" of the retainer clip and the plastic wall of the inner watch housing and lever upward carefully.


    pry up

    pry up


    Gently slide out the old battery.


    slide out battery

    slide out battery


    Slide in the new battery, then press the retainer clip back into place.


    re-seat battery clip


    Re-set the AC.


    Reset AC 1


    Using tweezers or a piece of wire, touch both the AC contact and the stainless steel area around the battery clip (labeled with (-)).


    Reset AC


    Replace the gasket if necessary and reattach the back of the watch with the screws.

    Disclaimer

    Casio does not recommend that people replace batteries themselves. If you break the watch while replacing the battery, that's your responsibility.
    Thank you for contacting Casio America Inc. As a result of certain aspects of our watches we only recommend that Casio authorized technicians work on the watch. In order to re-seal, re-pressurize, and re-calibrate the watch the technician needs certain knowledge, and parts that most jewelers don't have. For this reason we recommend that any work that needs to be done to the watch be done by one of our authorized service centers.

    Please ship your watch through a method that will provide you with a tracking number. Please make sure to include a letter with your name, address, phone number and nature of your request inside of the package so that the technician is aware of the service that is being requested.

    Disclaimer 2 - Use Caution!

    I received this comment by email from Don Z:
    Mine is a 104, but very similar.

    A word of warning, on mine the buttons were sticking so I thought it would be a good idea to remove the watch mechanism from the case. Not a good idea. In the process the hands popped off and several gasket like pieces came loose. Not sure I'll be able to recover.

    Casio Wave Ceptor 2556 Battery Replacement - Not For the Mechanically Challenged ( in category Show & Tell ) - posted at Sun, 08 Sep, 18:20 Pacific | «e»

Comments

Thanks for your helpful instructions. I bought my Casio 2556 watch at Target in 2007 for $30, and its battery lasted until this year (2014). I'm not sure what it would cost to have someone else replace the battery, but I wasn't about to find out. It was easier than I thought once I figured out the way the case worked, and your photos helped a lot. As I no longer wear the watch but keep it on a window shelf for a time reference, I wasn't too worried about proper sealing, etc. Thus my reluctance to have the battery replaced professionally.

Notes:
- You can lift the bottom edge of the mechanism slightly out of the case in order to more easily open and close the battery clasp, but the top edge is attached to the case by a small printed circuit strip you must be careful not to break.
- Once you lift up the mechanism you may find that there is a inner lens below the front lens which can fall out of place, but is still captured inside the case. You need to jiggle the watch while holding it upside down until the inner lens drops back into place with the magnifier lens at the top-right position. Press the mechanism back in place to hold it there.
- Using a small metal screwdriver it is fairly easy to place the screwdriver tip on the "AC" spot and the shaft against the edge of the (-) plate at the same time (in order to restart the watch). This is easier than using tweezers, in my opinion.

Thanks again - Bill Spencer, Hyde Park NY


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