seiko a259 - suddenly racing..

[james_stan]

Hi all

The seiko I bought about 7 months ago and wearing daily suddenly started 'racing' yesterday - gaining about 2 minutes an hour ! Just checked the battery with my DVM 1.585V so should be good I think.

Any ideas about possible causes/remedies ?

Cheers

James

[Seiko Kid]

Might be the trimmer thats a touch out, or a fault arising in the circuit board?

[james_stan]

Hmm yes, I thought abou the trimmer (varicap isn't it ?) but the change was quite big and sudden. Not the slow drift I would have expected.

Cheers

james

[charger105]

Sounds like the QC is running out of spec.
Did you drop or knock the watch recently ? If the quartz crystal has experienced a shock then this may account for the sudden speed change.

Rgds.

[Seiko Kid]

Think Chargers onto something here, on reading the Tech guide it appears that any fault arising in the circuit board could be playing a part in it. You could always try giving it a vinegar / alcohol bath and see if that help clear up any residual circuit board shortages?

I just did some repair work on a A259 and found a cheeky bit of electrolyte damage, was working fine still but I could see it affecting it in the future, maybe you have something similar?

[james_stan]

OK thanks guys I'll have it apart at work and put a scope on the QC later this week hopefully.If it's waay out (as in 1-2 mins per hour) Then the scope measure shouldbe good enoughto detect it I hope. Don't recall knocking or banging it although my cycle ride to work can be rather bumpy=> vibrations.

At least that's a starting point...

Ta

JS