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Discussion Starter · #1 · (Edited)
Hello forum

Brand new member here. I have a Pathfinder PAG40 that the batteries are finally going in (almost 4 years!). Not willing to spend the $70 Casio service wants to change the batteries. I have the back off and thanks to the how to I can remove and replace the batteries but how do I reset the ac with 4 batteries. I do not see one AC point to touch to the back of the batteries. Is it the one marked circle point on the silver plate or is it the little gold dots? Don't really want to experiment. Also does anyone have a name brand for the USA of a silicone for the gasket? Thanks for any and all help

Bob
 

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Discussion Starter · #2 ·
Hi:

No replys, maybe this is not the correct forum for this question. Can anyone help with my question or direct me to a better forum for my question.

Thanks
Bob
 

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That's strange how they labled it. I would suspect is the gold dot on the right of the picture.
 

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Schwinnbob said:
Hello forum

Brand new member here. I have a Pathfinder PAG40 that the batteries are finally going in (almost 4 years!). Not willing to spend the $70 Casio service wants to change the batteries. I have the back off and thanks to the how to I can remove and replace the batteries but how do I reset the ac with 4 batteries. I do not see one AC point to touch to the back of the batteries. Is it the one marked circle point on the silver plate or is it the little gold dots? Don't really want to experiment. Also does anyone have a name brand for the USA of a silicone for the gasket? Thanks for any and all help

Bob
Greetings Schwinnbob.
I used this site which one of our moderators, Sjors, pointed me to:
http://watch-coo.com/battery/casio/casio.html

This owner changes the battery on his Protreks too.
http://watch-coo.com/battery/casio/protrek1.html
http://watch-coo.com/battery/casio/protrek-prt60.html
http://watch-coo.com/battery/casio/protrek-prt50.html
http://watch-coo.com/battery/casio/prt700-2334.html
http://watch-coo.com/battery/casio/prt40-1471.html

For all these watches it looks like the gold dot. Is is possble for more close up pictures of the watch opened? The pic you posted is good, but there is something in the top left hand corner I am curios about.

I hope this site helped.

P.S Did you used to have a Schwinn bicycle?:-!
 

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Discussion Starter · #5 ·
Hi Guys!

Thanks for the replys. I have replaced the picture on my initial post with hopefully a better one. With this better picture if anyone has more info it would be greatly appreciated. The watch changing site was great but could not find any that had 4 batteries like mine. Once the AC point is identified it should be a piece of cake.

Yes, did use to collect Schwinn bikes and of course had one has a kid. As a matter of fact, still have the same bike from my childhood - 1968 Rams Horn Fastback. Had to give up the collecting though as bikes take up a huge amount of room. Have moved on to Aurora Postage Stamp N Scale Trains.

Thanks!
Bob
 

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Hi Bob,

I have literally today picked up a PRG-40 in the post that needs 4 new batteries :\

As soon as I've got some of the right size I will get the case open and see what's going on in there, should be just a few days :)

In the mean time if you find out yourself do let me know in this thread,

Cheers, Alex
 

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Discussion Starter · #7 ·
Hi Guys:

After looking at it more closely, I decided to plunge in. On the back in the metal the arrow is pointing towards the group of 4 gold buttons and on the back in the plastic between the metal and buttons has the AC molded in by the bigger button. I took that to mean the bigger button is the AC. Just finished changing the batteries and touching that button to the back of all 4 batteries with tweezers and it is all good. Reset and everything looks good.

Thanks again for all the input! Now I need to get a G-shock since reading all these posts has me wanting one.

Bob
 

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Ah, I think I see what you mean.

The larger of the four gold contacts together with the other end of the tweezers on one of the batteries seems to reset it for me.

Managed to pick up 20 AG7 cells on ebay for £2.49 inc. del right now so in theory I have enough cells for 5 battery changes for what would cost me a new watch twice over if Casio serviced it!

I can't get over this watch - 6 volts and huge, what a beast it is.

Bob does your bezel rotate and in which direction? Mine doesn't, that's the next thing I have to investigate :)
 

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Discussion Starter · #9 · (Edited)
Hi Alex:

I wasn't sure if I needed to touch all 4 batteries and didn't check after doing one but I would tend to agree that you only need to touch one. My bezel only turns counter clockwise. I also got my batteries on ebay 10 for $6 shipped and now we know how to do it so it is a great thing.

Bob
 

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Hi Schwinnbob etc.

I appreciate you or anyone can share exact step to contact AC with battery (+) using tweezers after battery replacement. I has been trying to contact AC with battery (+) using tweezers but don't have good news so far. I purchased 5 renata 1.5 V battery from ebay. I have the same watch (Casio Pathfinder 2271 PAG-40) as the picture posted above.

Thanks for help in advance.
Robert
 

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You touch the upper left of the four gold points that the arrow points to and either a place on the metallic backplate or one of the batteries, as they are all connected via this metal plate. The watch runs on 1,5 volts with the batteries parallel to have more current available or have current available for a longer time.
 

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If you have trouble getting a good connection with your tweezers, you can also try another type of metal. I have used a compass with two metal tips, or even an uncoiled paper clip. Some tweezers that have blunt tips can sometimes be difficult to make good contact.
 

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Thank lowtech and Catherine for the prompt response. I am able to reset the watch now with your instruction.

I haven't used this watch for three months; the adjust and mode buttons are no longer working to adjust time. Any comment is appreciated.

Thanks in advance.
Robert
 

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Catherine is right, sometimes you move the module around while changing batteries and the small metal strips that should get pushed by the buttons are out of place, often they heve slipped over the buttons. I do not know the architecture of the PRG 40 module, but on most modules you can push those metal tongues aside with a pinpoint or an xacto blade and allow them to resettle in the right position for the button´s rods to reach them again.
Hope this makes any sense...
 

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I have reason to suspect (but no definitive documentation to prove) that the four batteries in this watch are in fact two sets of two; one set provides time functions, stopwatch, alarms etc and the other provides power for the triple sensor functions (altimiter, compass, temperature).

In the middle of a re-powering teardown myself and had the "disappointing" experience of carefully removing the plastic inner shield to reveal a small rod, about the same size as the springs, lying loose in the watch. I have no idea where this came from. 8o(
 

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Hi, I just found this forum today and it helped me a lot to replace my batteries

can somebody tell me what is the use of the two golden springs pointing up thru the plastic cover just below the paper tag ??
 

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can somebody tell me what is the use of the two golden springs pointing up thru the plastic cover just below the paper tag ??
While I don't know for certain about the PAG40, A LOT of Casios have springs that need to contact the case back in order for the watch to make sounds like the alarm and/or other "beeps" -- as in this thread: https://www.watchuseek.com/f17/how-can-g-shock-sound-741445.html

That would be my first guess in this case! (There are other watches with springs on the other [face] side of the module that need to contact the solar cells to charge the watch, but most on the "back" side seem to be for the speaker!)


 

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There is a very small spring that inserts in a small "hole" near one half of the strap end. Beware when removing the back that this does not fall out or jump out when removing the metal back. By luck I found a picture of this on the web, sorry I did not take a picture to post. If there is time between removing the back and putting the new batteries in I recommend having scotch tape handy to hold on to the screws - and spring if necessary- and drawing a diagram on a piece of paper - to help with reassembly. Also, the releases for the batteries are , for the end batteries to the inside of the watch. Insert a sewing pin between the plastic and gently pry and the metal will unlatch. The two center batteries have one latch between them, use the same procedure. [You may need to use the pin to pry them out.]To reset, get a paperclip and bend it into a "u" shape. Put one end on the lagrer of the 4 contacts near where it says AC with the arrow and one on a battery. I reset by touching each battery in this manner. When reassembling do not forget the plastic piece and tighten them, the screws for the back in a criss cross sequence so that the metal seats with the gasket properly - evidently there is some sort of silicone [or sometning like that ] to apply to the gasket. I did not have any and the watch works fine now. My watch is a little fast but I do not mind resetting the seconds every so often, with the atomic time broadcast as the procedure is simple.
Best of luck to all of you.
Thomas E. Shafovaloff
 
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