08 May 2008 10:18:04
Paul Hovnanian P.E.
OT: Watch Repair

I have an old Seiko watch which used to have a nice chime for its alarm
function. Lately, it has gone silent. When its battery went dead and I
opened it to replace it, I noticed that the piezo transducer, a small
disk glued to the inside of the watch back, appears to be cracked.

Is it possible to obtain 'bare' piezo transducer disks? Who caries
these? How easy are these to work with? The transducer is connected to
the 'works' by a pair of gold-plated spring contacts, so no soldered
connection will be required.

Watch repair outfits want an outlandish price just to pop the back off
this thing to look. It is actually 3 watch movements in one and (they
claim) far too complex to risk poking around in. I think they just want
to sell me a new watch.

--
Paul Hovnanian paul@hovnanian.com
-----------------------------------------------------------------------
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08 May 2008 13:06:17
Michael A. Terrell
Re: OT: Watch Repair


"Paul Hovnanian P.E." wrote:
>
> I have an old Seiko watch which used to have a nice chime for its alarm
> function. Lately, it has gone silent. When its battery went dead and I
> opened it to replace it, I noticed that the piezo transducer, a small
> disk glued to the inside of the watch back, appears to be cracked.
>
> Is it possible to obtain 'bare' piezo transducer disks? Who caries
> these? How easy are these to work with? The transducer is connected to
> the 'works' by a pair of gold-plated spring contacts, so no soldered
> connection will be required.


Why not take one out of a pizeo alert, or junk DVM? Or even ask on
the right newsgroup? news:alt.horology


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09 May 2008 10:25:31
Ross Herbert
Re: OT: Watch Repair

On Thu, 08 May 2008 10:18:04 -0700, "Paul Hovnanian P.E." <paulh@seanet.com >
wrote:

:I have an old Seiko watch which used to have a nice chime for its alarm
:function. Lately, it has gone silent. When its battery went dead and I
:opened it to replace it, I noticed that the piezo transducer, a small
:disk glued to the inside of the watch back, appears to be cracked.
:
:Is it possible to obtain 'bare' piezo transducer disks? Who caries
:these? How easy are these to work with? The transducer is connected to
:the 'works' by a pair of gold-plated spring contacts, so no soldered
:connection will be required.
:
:Watch repair outfits want an outlandish price just to pop the back off
:this thing to look. It is actually 3 watch movements in one and (they
:claim) far too complex to risk poking around in. I think they just want
:to sell me a new watch.
:


You are probably right in your assumption. Watch repairers, like trained
mechanics or electronics appliance repairers, will always use parts intended for
the job. That means that if the watch is a Seiko they will only use Seiko
replacement parts. Since Seiko and most other electronic watch manufacturers
won't keep spares for more than 10 years the likelihood of finding a spare
transducer for your Seiko is poor. Naturally, the repairer doesn't want to go to
a whole heap of trouble to try to find someone who does carry a spare,
particularly when the owner isn't prepared to pay for his time and trouble in
doing so. I'm afraid that if you can't locate a genuine replacement transducer
yourself then you have had it.


10 May 2008 11:55:59
Paul Hovnanian P.E.
Re: OT: Watch Repair

"Michael A. Terrell" wrote:
>
> "Paul Hovnanian P.E." wrote:
> >
> > I have an old Seiko watch which used to have a nice chime for its alarm
> > function. Lately, it has gone silent. When its battery went dead and I
> > opened it to replace it, I noticed that the piezo transducer, a small
> > disk glued to the inside of the watch back, appears to be cracked.
> >
> > Is it possible to obtain 'bare' piezo transducer disks? Who caries
> > these? How easy are these to work with? The transducer is connected to
> > the 'works' by a pair of gold-plated spring contacts, so no soldered
> > connection will be required.
>
> Why not take one out of a pizeo alert, or junk DVM?

Maybe as a last resort. I am willing to spend a few bucks on a new part,
if available.

> Or even ask on the right newsgroup? news:alt.horology

Because locating electronic parts not marketed as replacement parts for
timepieces would seem to be a better fit to this group.


--
Paul Hovnanian paul@hovnanian.com
-----------------------------------------------------------------------
Procrastinators: The leaders for tomorrow.