That's pretty amazing that the tiny speaker is connected to the watch via that itty-bitty spring! I remember throwing the tiny spring into the trash wondering where it came from - I had opened up my watch earlier - and when replacing my battery, was confused as to why the beep wasn't working! Came right back to this video in time, and thankfully was able to fish it out of my trashcan... phew :)
Thank you for the video! It really helped me figure out how to change my watch battery myself. I know that it’s an inexpensive watch but I’ve had mine for 3 years and I’m really quite attached to it so I didn’t want to buy another one. So thanks! :) Words of wisdom for others trying to replace the battery on this model: The sticker on top of the battery clip that says “After battery replacement...” is actually kind of important! (I think 😅) I did not know this going in and took mine off like a fool lol. When I put my watch back together originally the sound didn’t work. I eventually figured out it was because I removed that sticker. I put a piece of clear tape in the same place the sticker was and when I put it back together again the sound worked! Keep that in mind anyone else who also loves their $20 Casio with all their heart and wants to keep using it. Lol
Been my daily for some time now, and It gives great nostalgia from the iconic 91, while being a complete upgrade, and with everything perfected. Just flawless. Really interesting video. I have no issues with it, but nice knowing this info!
Thank you! Much of this is appropriate for the F-91w. I used a Phillips P-000 for the screws and had very little slippage. True this watch is inexpensive to buy, but I enjoy keeping mine going. The band failed before the battery! Getting the band for a lower-than-watch price was quite a challenge! Cr2016s are expensive in US stores but inexpensive online, such as eBay.
7:45 - The big blob is the "watch itself" and the small one is the "Illuminator" boost circiut, this way they can use same silicone/chip on different PCB's and create various modules. You'll probably find the same "big chip"/silicone in the F-91W, A158, A168, etc. by itself and the same goes for the small chip, you'll most likely find it in most modules that have an "illuminator" backlight, like this A105. Creating a custom silicone with both the watch circuitry and the boost circuit for the "illuminator" would be much less cost effective and mass production cannot allow that to be the case. Hence, why even AMD (kinda late tho.. ) finally got ahead of Intel, because of their chiplets per silicone wafer efficiency/yields (used in CPU's instead of one big silicone die) - not talking about performance here, (that would be irrelevant) but only the profit margin on the sold product.
My friend, a nice video that i enjoyed, but the worst part of all, was when you used a power tool on those screws at the end, never do that,you need to carefully,by hand,search for the threads that are already there,not force the screws in, cutting new threads and stripping the plastic; power tools are just for disassembly; folks,please think(and read..) about that.
Please do disassembly and timer mod for W800-H. I knew some other channel had it covered, but i believe you are the most meticulous and careful one in doing it.
Great video. The gasket once removed is nearly impossible to get back into it's proper position. What type of tool would be needed to remove the battery retaining clip?
Sewing needle, safety pin, straight pin, actual electronics tweezers, watch link pin pushing tool, smallest size paper clip, cell phone SIM card ejection tool. Probably many more things, but there's a few to start with.
Hey man my watch is F105 but slightly different placement of that tiny spring. Anyway my watch finally died after like 10+ years and I figured it was the battery so I went and bought a new CR2016 battery like removed from it... I put the new battery in but I don't get anything from the screen at all. Like... Absolutely nothing. No sounds or time on the screen or anything. I tried switching the orientation of the back screw-on plate in case I had it upside down but no change... Seems like it's just totally dead. I really don't want to get a new one, even though they are extremely inexpensive. I've had this one for so long and it's been through so much, I want it to work! Any ideas?
Hey, thanks for the tutorial very helpful. However, after i replaced the battery for some reason the display keeps fading away after 5-10secs. If i press any of the buttons the display comes back on again with the correct time. Would you know what could be causing this? Thanks!
I found that the smartphone SIM tool works perfectly to unhook the battery clip. For the #000 screwdriver I got this at Walmart: "HART 6-Piece Precision Screwdriver Set with Comfort Grip"
@@mgomez5606 if I remember right, insert at maybe 85-90° angle, then tilt against battery so tip pulls clip away from battery and it’ll pop open. It’s tricky finding the right spot cuz it’s so tiny, but once reached it pops out fairly easily.
No. They're very close in size, but the only things these two watches have in common is the battery and the pushers and the bands. Not even some of the obvious things, such as the crystal and the battery covers are the same. These two watches are so very, very close to each other, but once you get past the battery, they're miles apart.
That's pretty amazing that the tiny speaker is connected to the watch via that itty-bitty spring! I remember throwing the tiny spring into the trash wondering where it came from - I had opened up my watch earlier - and when replacing my battery, was confused as to why the beep wasn't working! Came right back to this video in time, and thankfully was able to fish it out of my trashcan... phew :)
The 3298 module is a revision of the 1275 module. I have a F105W that's just a few years old, and it's got the 3298 module too.
Thank you for the video! It really helped me figure out how to change my watch battery myself. I know that it’s an inexpensive watch but I’ve had mine for 3 years and I’m really quite attached to it so I didn’t want to buy another one. So thanks! :)
Words of wisdom for others trying to replace the battery on this model:
The sticker on top of the battery clip that says “After battery replacement...” is actually kind of important! (I think 😅) I did not know this going in and took mine off like a fool lol. When I put my watch back together originally the sound didn’t work. I eventually figured out it was because I removed that sticker. I put a piece of clear tape in the same place the sticker was and when I put it back together again the sound worked! Keep that in mind anyone else who also loves their $20 Casio with all their heart and wants to keep using it. Lol
Been my daily for some time now, and It gives great nostalgia from the iconic 91, while being a complete upgrade, and with everything perfected. Just flawless. Really interesting video. I have no issues with it, but nice knowing this info!
Thank you! Much of this is appropriate for the F-91w. I used a Phillips P-000 for the screws and had very little slippage. True this watch is inexpensive to buy, but I enjoy keeping mine going. The band failed before the battery! Getting the band for a lower-than-watch price was quite a challenge! Cr2016s are expensive in US stores but inexpensive online, such as eBay.
Use sewing needle to pry open battery latch at the centre.
7:45 - The big blob is the "watch itself" and the small one is the "Illuminator" boost circiut, this way they can use same silicone/chip on different PCB's and create various modules. You'll probably find the same "big chip"/silicone in the F-91W, A158, A168, etc. by itself and the same goes for the small chip, you'll most likely find it in most modules that have an "illuminator" backlight, like this A105. Creating a custom silicone with both the watch circuitry and the boost circuit for the "illuminator" would be much less cost effective and mass production cannot allow that to be the case. Hence, why even AMD (kinda late tho.. ) finally got ahead of Intel, because of their chiplets per silicone wafer efficiency/yields (used in CPU's instead of one big silicone die) - not talking about performance here, (that would be irrelevant) but only the profit margin on the sold product.
Do you think the f105 module will fit in a a158?
This was SUPER helpful! I fixed my watch! Thank you.
- Paul, USA
Second chip (smaller one) is propably electroluminescent backlight driver. As you can see, the pad from EL backlight is connected to chip.
Well explained! Great Video! Thanks 🙂
terimakasih Casio karena telah menggunakan baterai buatan Indonesia.. 😅
Thank you very much very good tutorial
Great. My spring fell on the floor. Cant find it now. Any clue where you get another one from?
Gracias por tu video, pude desarmar mi reloj sin miedo a que se perdiera alguna pieza sin darme cuenta, como pudo haber sido el resorte.
Both modules 1275 and 1572 is pre authenticity, display check.
My friend, a nice video that i enjoyed, but the worst part of all, was when you used a power tool on those screws at the end, never do that,you need to carefully,by hand,search for the threads that are already there,not force the screws in, cutting new threads and stripping the plastic; power tools are just for disassembly; folks,please think(and read..) about that.
Gracias, saludos desde Catalunya
Thank you, great explanation.
Please do disassembly and timer mod for W800-H.
I knew some other channel had it covered, but i believe you are the most meticulous and careful one in doing it.
Hi. Do you know what is the meaning of that number 2014 in the circuit?
That number has the year 2014?
Great video. The gasket once removed is nearly impossible to get back into it's proper position.
What type of tool would be needed to remove the battery retaining clip?
I use a very fine tip tweezer
You can used a needle
Sewing needle, safety pin, straight pin, actual electronics tweezers, watch link pin pushing tool, smallest size paper clip, cell phone SIM card ejection tool. Probably many more things, but there's a few to start with.
I just wanted detailed example of changing the battery, which was not shown here.
Hey man my watch is F105 but slightly different placement of that tiny spring. Anyway my watch finally died after like 10+ years and I figured it was the battery so I went and bought a new CR2016 battery like removed from it...
I put the new battery in but I don't get anything from the screen at all. Like... Absolutely nothing. No sounds or time on the screen or anything.
I tried switching the orientation of the back screw-on plate in case I had it upside down but no change... Seems like it's just totally dead.
I really don't want to get a new one, even though they are extremely inexpensive. I've had this one for so long and it's been through so much, I want it to work!
Any ideas?
Hey, thanks for the tutorial very helpful. However, after i replaced the battery for some reason the display keeps fading away after 5-10secs. If i press any of the buttons the display comes back on again with the correct time. Would you know what could be causing this? Thanks!
The spring is missing or not set in the watch right. I did this too.
9:10 Your tweezers are magnetized.
Battery life able endure until 8 years 👍✌
As long as you don't press the backlight frequently. 😜
@@Boodlums
No way then. Part of the attraction of an EL backlight is pressing the button constantly and seeing that beautiful blue glow.
I found that the smartphone SIM tool works perfectly to unhook the battery clip.
For the #000 screwdriver I got this at Walmart: "HART 6-Piece Precision Screwdriver Set with Comfort Grip"
@@mgomez5606 if I remember right, insert at maybe 85-90° angle, then tilt against battery so tip pulls clip away from battery and it’ll pop open. It’s tricky finding the right spot cuz it’s so tiny, but once reached it pops out fairly easily.
Oh, and to find the AC I used my phone camera to pinch zoom to magnify, as it’s only stamped into the metal and thus low contrast, haha.
@@mgomez5606 I don’t know how else to explain it. Hopefully once you’re doing it it’ll be like “ohhh, that’s what he meant” :)
@@mgomez5606 yes but it was instant.
Electro back light is precision ！
Will the module fit F91?
No. They're very close in size, but the only things these two watches have in common is the battery and the pushers and the bands. Not even some of the obvious things, such as the crystal and the battery covers are the same. These two watches are so very, very close to each other, but once you get past the battery, they're miles apart.
What battery uses this watch?
CR2016 3V
Tyms!!!
Винтики надо отворачивать по диагонали, крест накрест.
Así no se desarma, pero la intención es buena. 😹
Oi blz
I am now the owner of a broken Casio :/
Not so hard like that...you can opened battery clip with needle...
Changing the battery is probably the most important point of the video and was not covered properly.