Re: DSC DW4975 Vanishing Contact

[Jim <alarminex@xxxxxxx>]

On Thursday, March 12, 2015 at 8:20:12 PM UTC-4, Chris wrote:
> Has anyone had issues with the DSC (Secure Wireless) EV-DW4975 Vanishing =
Contact?
>=20
> I haven't used many of them, as I prefer the standard contacts and the ab=
ility to install with screws, but I have one system (a 1616) with four of t=
hese contacts that has been a pain lately.  After being installed for about=
 4.5 years (right on time), one of the contacts has a low battery.  However=
, replacing the battery doesn't clear the trouble.  Nor does it help to ope=
n and close the door to help force a signal through, which is what always w=
orks on the standard contacts.
>=20
> On the other hand... The battery voltage is good, and this is the second =
new battery we've tried.  The contact is sending tamper and tamper restoral=
 signals as it should.  And the zone shows open and closed as it should.
>=20
> My next thought is to ship them a new contact... unless anyone has any be=
tter ideas?
>=20
> - Chris

One of the old tricks I used to use on the old Ademco transmitters was any =
time a transmitter needed a battery changed .... before installing the new =
battery I would short out the battery terminals on the transmitter. Seems t=
here was a capacitor that retained a charge which didn't let the low batter=
y indicator circuit discharge. Just short the two battery terminals with a =
screwdriver or something metal for a few seconds then install the new batte=
ry.=20

Don't know if it will work but it's worth a try.=20

Get back and let us know what happened. =20