Jump to content

Ewen

Ewen

By Ewen
in Watch Repairs Help & Advice

 Share

Recommended Posts

Ewen New Member

Ewen

Posted
Posted

Seiko Kinetic 5M62..Hello,

I bought this not working and have replaced the 'capacitor' with a seiko kit(surely it's a rechargeable battery).

The battery was showing approx 1.3v when I put it in and the watch did not start working. Surely this means it's an electrical fault, maybe with the circuit board. I've seen that video of the stripdown where the watch does not work and the guy goes on to diagnose a problem with the winding wheel. However, if the new battery/accumulator/'capacitor' was charged when put in, it should work straight away (no 'winding' required) and the fault is almost certainly electrical. Any suggestions for common electrical problems with these watches. The contacts are definitely correctly aligned. Any help much appreciated.

Link to comment
Share on other sites
jdm Distinguished Member

jdm

Posted
Posted
33 minutes ago, Ewen said:

The battery was showing approx 1.3v when I put it in and the watch did not start working. 

There is no guarantee that the rechargeable battery replacement comes fully charged. So you will have to find a way to charge it, wired or by induction. You can also test or even run permanently run the quartz module using a common SR battery. 

Link to comment
Share on other sites
watchweasol Distinguished Member

watchweasol

Posted
Posted

Hi As jdm remarked there is no guarantee   That the capacitor comes fully charged  or has not been degraded when fitting. I have attached the tech sheets for the seiko and also capacitor information.    To check out the watch either  fit it on a winder  or an induction charger .      An electronic tooth brush charger with a foam collar on the point has been known to charge capacitors (induction).    

Seiko 5M62, 5M63A.pdf Batteries - Seiko Capacitors (1).pdf

Link to comment
Share on other sites
Marc Distinguished Member

Marc

Posted
Posted
1 hour ago, Ewen said:

The battery was showing approx 1.3v when I put it in

I believe that this is an MT920S, which is simply an MT920 Lithium rechargeable with tags to fit Seiko (hence the "S").

The nominal operating voltage for an MT920 is 1.5V, so if yours was reading 1.3V it was not properly charged.

Link to comment
Share on other sites
Ewen New Member

Ewen

Posted
  • Author
Posted

Thanks to all three of you for all this advice.

I have stripped it down to and removed the circuit board. I cannot see anything wrong with the contacts or the condition of the board. However, I'll try putting a 1.5v battery in to test. I shook it 250 times and it didn't start but I'll try some of the tests given on the data sheet.

Thanks again to all of you, much appreciated.

Link to comment
Share on other sites
Ewen New Member

Ewen

Posted
  • Author
Posted

Hello again, Ewen with the 5M62 Kinetic.

I've tried charging it by induction using an electric toothbrush unit and it remains completely dead. I've also tried rotating it 250 times and there is no apparent electrical activity at all. The mechanical parts all seem to move freely. The battery charge remains at 1.3v. On the data sheet it states that the operating voltage is between 0.45v and 1.5v, so surely 1.3 v would be enough to get it moving?

Since charging remotely works  by induction (ie via the coils in the watch) I am thinking the next logical thing to do is test the coils, or at least see if the stated resistance agrees with the values in the data sheet. I cannot see any breaks or marks on the circuit board to suggest that it has been disassembled carelessly in the past. Any thoughts?

Link to comment
Share on other sites
 Share
Go to topic listing


  • Recently Browsing

    • No registered users viewing this page.

  • Topics

  • Posts

    • Zedster
      Movement inserted from crytal side

      By Zedster · Posted

      Hi, guys I have a bit of a predicament and hopefully, somebody can advise. I'm working on a Roamer MST 521 where the movement is extracted from the crystal side. I'm now at the final hurdle where I need to replace the movement back into its case but I'm not sure of the correct procedure. I still need to fit the hands but that's where the problem lies. If I insert the winding stem to test the hands for correct alignment I will need to turn the movement over to release the stem again it's the spring-loaded type and needs a small bit of force to push down but with the hands fitted, I don't think I can do this on a cushion without causing some damage to the hands and that's the last thing I want to do, this watch has already been a love-hate relationship and I'm so close to boxing this one off which I'm counting as my first major project.  The other option is to case the movement then fit the hands and hope everything is okay. I've already broken the original winding stem but managed to find a replacement, the last one in stock, so I'm a bit reluctant to keep removing it. Any suggestions would be appreciated. 
    • Jon
      Main spring

      By Jon · Posted

      I would go for the dearer spring. You won't need to remove the spring from the carrier ring and then use a mainspring winder to get it into the barrel, for a start. Also that spring is closer to the needed dimensions, especially the length. The length plays a part in the mainsprings strength. If you double the length you will half the force (strength) of the spring and vice-versa. A spring with 20 mm less length would be about 7% shorter, so technically would be 7% more strength, but I find halving this number is closer to real-world findings, so the spring would be about 3 to 4% more strength/force. On a mainspring that ideally kicks out 300 degrees of amplitude, a 3% increase in amplitude would be 309 degrees. Increasing or decreasing the length of the mainspring will affect the power reserve to a greater or lesser degree. It depends how much shorter or longer it is.
    • Malocchio
      What tools does ebay have to offer this week.

      By Malocchio · Posted

      I recently bought this but not on ebay. I figured if I want something Japanese I better check Japanese auction sites since these don't seem to pop up on ebay. I paid 83 € plus shipping & taxes. I think it was pretty reasonable for a complete set in good condition.
    • GuyMontag
      1972 Bulova President "E" Sea King 11ACACB movement

      By GuyMontag · Posted

      Did you take the friction pinion off the large driving wheel and grease it? Although, now that I think about it, that shouldn't have any effect on the free running of the train if the friction pinion isn't interacting withe minute wheel/setting wheel...
    • DDean
      Incabloc Lyre Spring & Low Earth Orbit

      By DDean · Posted

      I did in fact use Rodico to get the spring into general position and "hold" it there while I used a fine oiler to make subtle positional adjustments.
×
×
  • Create New...