[cYoXlByOem]

Took my Seiko SNA553 to a watch shop to have the battery changed. Got it back, now the chronograph is constantly running and can't be stopped.

Pulling the crown out to the second click and holding in both A & B buttons doesn't reset the watch. It appears the watch is not registering any A button operation. The B button seems to work normally.

Opened the back and can see that the A button is working a small lever when it is pressed.

Any ideas on how to stop & reset the chronograph, or to investigate the button operation further?

 

[Salman Raza]

I have the same issue with my 7T62 0AX0. After changing the battery the Button A does not work, the chrono is constantly on, I have to press the button 'B' 2 times to make the big chrono second hand stop. The was lost for like 3 years shortly after I had bought it, found it recently, the battery was dead, had it changed and I have the same problem as you have described above.

Did you manage to make any progress in resolving the above. I would like to investigate if there is a way to fix it myself or there is no other option but to send it to the watch dealer for repairs.

Thanks

 

[cYoXlByOem]

The chronograph appears to have finally stopped after running continuously for several weeks.

Seiko's 7T62 manual says that the chronograph should have stopped after twelve hours.

My impression is that the internal CPU was not reset properly after changing the battery.

I had asked the watch shop (Bower's Watch in Atlanta, GA) about changing the battery in a Seiko perpetual calendar watch and maybe changing out some custom hands. His blank stare pretty much indicated his skills don't venture far beyond:

1) remove back

2) replace battery

3) wonder why watch acts funny

In any case I'm very happy to have one of my favorite watches at least in 95% operating condition.

 

[Seiko7A38]

I'm not personally familiar with the 7T62 movement, but it is an evolution of the 7T32, which I know fairly well.
After replacing the battery in a 7T32 it is necessary to perform an AC reset, to restore full functionality.
See this thread: https://www.watchuseek.com/f365/bat...rial-seiko-7t32-pulsar-epson-y182-287013.html
Might it be worth popping the battery out, replacing it and trying this on your 7T62 ?

 

[Davidtan]

had similar prob, advised to send back for service may due to circuit faulty, had send it back since its quite costly to get it fix, hence may just keep it without chrono function, sad...

if there is any tips can resolve without sending back for service would be great

 

[pyrod]

Thanks Seiko7A38, will give it a shot. Had got the battery replaced at a so called repair shop, where the guy did everything from fixing computers, to watches, since I did not have the tool to remove the screw back off the Seiko watch. Usually I replace the battery of my other watch myself which has a snap down type back.

While I was at the repair shop the worker there had used some kind of device, a black box that looked like a small transistor radio, on which he kept the watch and pressed a button on the device, which caused the hands of the watch to spin around like crazy. I guessed it was some kind of instrument to test workings of a quartz watch. Is it possible that this thing that the watch repair guy used on the watch could have caused the weird watch behavior?

 

[stumpy1972]

Took my Seiko SNA553 to a watch shop to have the battery changed. Got it back, now the chronograph is constantly running and can't be stopped.

Pulling the crown out to the second click and holding in both A & B buttons doesn't reset the watch. It appears the watch is not registering any A button operation. The B button seems to work normally.

Opened the back and can see that the A button is working a small lever when it is pressed.

Any ideas on how to stop & reset the chronograph, or to investigate the button operation further?

My apologies for bumping an old post but has anyone come up with a solution on how to fix the "I replaced the battery, but now my A button doesn't work" issue? I just replaced the battery in my buddies SNA411 Flightmaster which has the infamous 7T62 movement and I have the same issue. Can't stop or start or reset the chrono to zero because the A button isn't working. Can pull the crown to pos 2 and the chrono starts running but can only use the lap time and the reset with the B button. I did use a 395 (SR927SW) battery instead of a 399 (SR927W) and I read somewhere about high drain and low drain but if the battery is running all the hands then I'm thinking this isn't the issue. PLEASE HELP!

 

[Seiko7A38]

I'm not personally familiar with the 7T62 movement, but it is an evolution of the 7T32, which I know fairly well.
After replacing the battery in a 7T32 it is necessary to perform an AC reset, to restore full functionality.
See this thread: https://www.watchuseek.com/f365/bat...rial-seiko-7t32-pulsar-epson-y182-287013.html
Might it be worth popping the battery out, replacing it and trying this on your 7T62 ?

I guess I ought to correct my earlier incorrect suggestion. :-x

At the time I wrote that, I'd not studied the 7T62 before - not so much as had the back off one.
Needless to say, with some of the problems I'd seen other owners having, I avoided them like the plague.
This weekend, I was asked to replace a battery in one - a 7T62-0FDO SNA559P1 belonging to a chap at work.

There is no AC reset required on a 7T62 movement.
Yes, there is a hole in the movement backplate, in the same place, with a gold plated contact on the PCB visible through it ....
But it is NOT marked <- AC and the label on the inside of the watch I worked on was completely blank.
So it did not say short AC to battery positive after replacing the battery (as it does on a 7T32).
My apologies to anyone I may have confused by my earlier incorrect assumption.

Absolutely no problems encountered whatsoever with this particular 7T62. b-)

Topic: Changing a battery in a 7T62 - and subsequent reset problems ? None encountered ! - Seiko 7A38 - by the numbers

 

[Seiko7A38]

Took my Seiko SNA553 to a watch shop to have the battery changed. Got it back, now the chronograph is constantly running and can't be stopped.

Pulling the crown out to the second click and holding in both A & B buttons doesn't reset the watch. It appears the watch is not registering any A button operation. The B button seems to work normally.

Opened the back and can see that the A button is working a small lever when it is pressed.

Any ideas on how to stop & reset the chronograph, or to investigate the button operation further?

Yes - read the instruction manual (page 7) properly ! :-d

http://www.seikowatches.com/support/ib/pdf/SEIKO_7T62.pdf

 

[Skippy4000]

I was quite surprised to see the 7T62 movement called "infamous". I've had one for 2 years and had absolutely no issues with the watch. Just bought another one with the same movement. This is probably my favorite Seiko chronograph quartz movement in production. Unless someone knows of a jeweled movement still in production?

 

[mertol]

Yes - read the instruction manual (page 7) properly ! :-d

http://www.seikowatches.com/support/ib/pdf/SEIKO_7T62.pdf

i have the same issue with one of 7t62a'a (flight master) . I have done the above procedure but watch does not respond when ı press button A for 2 seconds. Can anyone inform me more about how to solve the problem?

 

[thedudeabides]

I have the same problem exactly as you mertol. The above procedures do not work. It is as if button A simple isn't working. This, too, happened after changing the battery on my SNA225 (7T62A). At first after replacing the battery, the chronograph second hand was not centered but still moved now and then in response to the 'A' button. Eventually, pressing 'A' did nothing at all. I had the watch for over 5 years on one battery working perfectly. Now, the stopwatch function does not work at all and it seems to be because button 'A' at 2 o'clock in unresponsive.

 

[obsidian]

Same thing happened to my 7T62 after battery change: chronograph running constantly, button A does nothing.
I know this is one of Seiko's most common quartz chrono movements-- there must be hundreds of thousands of them out there-- so the relatively few complaints on this and other threads across several forums must be a drop in the bucket.
Still, for this many relatively watch savvy people to be having the exact same problem indicates an uncommonly encountered, but serious flaw in the movement.
Until a solution is found, I'd hesitate to recommend a watch with this movement to anyone.

 

[LJUSMC]

I have the same problem exactly as you mertol. The above procedures do not work. It is as if button A simple isn't working. This, too, happened after changing the battery on my SNA225 (7T62A). At first after replacing the battery, the chronograph second hand was not centered but still moved now and then in response to the 'A' button. Eventually, pressing 'A' did nothing at all. I had the watch for over 5 years on one battery working perfectly. Now, the stopwatch function does not work at all and it seems to be because button 'A' at 2 o'clock in unresponsive.

Are you guys using the right battery? The proper battery is the SR927W - which is a "high drain" battery... I've read other threads where people replaced the battery with the SR927SW which, although it will fit, is a "low drain" battery, which may power the hands, but not other features.

 

[puntxo]

Hi, there, I replaced the battery of my sportura SNA 481, (7t62 movement)with a fresh one and the same problem happened to me. Did any of you find out the solution?
Any idea will be sincerely appreciated.

 

[mertol]

Hi, there, I replaced the battery of my sportura SNA 481, (7t62 movement)with a fresh one and the same problem happened to me. Did any of you find out the solution?
Any idea will be sincerely appreciated.

Nope, I replaced the movement unfortunately. Cost me 80 USD

 

[cYoXlByOem]

Hi, there, I replaced the battery of my sportura SNA 481, (7t62 movement)with a fresh one and the same problem happened to me. Did any of you find out the solution? Any idea will be sincerely appreciated.

The chronograph finally stopped on my 7T62 several weeks after the battery was replaced. The watch has been operating normally for the past 18 months. Since I never use the chronograph function, I haven't been brave enough to hit the start button to see what it would do.

 

[Ahriman4891]

Well the same thing happened to me.

Replaced a battery in my Velatura chrono with a Renata. Performed the chrono hands reset as per the manual.

Chrono became finicky - it does stop, but roughly 40-50 seconds after I press the A button. B button then resets the chrono hands properly.
I re-opened the watch and tried cleaning the battery contacts. It became worse - the chrono misbehaves as before, but now the main seconds hand is stuck.

I officially consider the movement borked, since I have neither skills nor inclination to tinker with it further. I'm going to put the Velatura up for sale as a parts/project watch. Haven't really worn it for 3 years or so, hence not a big loss.

 

[puntxo]

Well the same thing happened to me.

Replaced a battery in my Velatura chrono with a Renata. Performed the chrono hands reset as per the manual.

Chrono became finicky - it does stop, but roughly 40-50 seconds after I press the A button. B button then resets the chrono hands properly.
I re-opened the watch and tried cleaning the battery contacts. It became worse - the chrono misbehaves as before, but now the main seconds hand is stuck.

I officially consider the movement borked, since I have neither skills nor inclination to tinker with it further. I'm going to put the Velatura up for sale as a parts/project watch. Haven't really worn it for 3 years or so, hence not a big loss.

What a pity! The Velatura is quite a nice watch to be "thrown to the bin" in such a way. I have not gotten my watch (Sportura) to work properly but it is so beautiful that, although the bad movement of the chrono, it will show up in my wrist every two weeks or so.

 

[Ahriman4891]

What a pity! The Velatura is quite a nice watch to be "thrown to the bin" in such a way. I have not gotten my watch (Sportura) to work properly but it is so beautiful that, although the bad movement of the chrono, it will show up in my wrist every two weeks or so.

I agree that it's a nicely made watch on the outside. Big shiny case, sapphire crystal, nice bracelet. Over time I decided it's too big for me, and I was planning to sell it anyway after the battery replacement. The movement issues just mean that I have to sell it for less... it's life.