dead siren output suggestions?

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KPierson

Platinum - Posts: 3,527

This member consistently provides reliable information

Joined: April 14, 2005

Location: Ohio, United States

Posted: April 08, 2010 at 8:26 PM / IP Logged

Looks like a burnt resistor to me. DEI likes to use very small resistors on their outputs to pretty much act like a fuse. In many cases the max current going through the resistor is well over the max current the resistor can safely handle.

Try this - Test continuity between the siren output wire and both sides of the burnt component. If you find one side is common with the siren output solder a small jumper wire to the OTHER side of the resistor and test voltage on that wire with the alarm going off. If the wire reads 12vdc when the alarm is going off then replacing the burnt component will fix the issue. If there isn't 12vdc on the wire you need to find what feeds that burnt component - it's most likely a pin on the right side of one of the ULN2003As

If the burnt component isn't connected to the siren output at all test resistance between the siren output pin and the pins on the ULN2003As and see if you can find what output pin drives the siren. You may also be able to follow traces to find where the signal goes.

Kevin Pierson

blanx218

Silver - Posts: 654

Joined: September 23, 2008

Location: Pennsylvania, United States

Posted: April 08, 2010 at 11:07 PM / IP Logged

Or if your that worried about it send the unit back to DEI. Every one of their products has a lifetime warranty and will be replaced at no cost. You'd have to go without the unit for 2-3 weeks but it would resolve all the issues as easy as pie!!!

hemidak

Member - Posts: 4

Joined: March 29, 2010

Posted: April 09, 2010 at 12:15 AM / IP Logged

Awesome information guys! Thanks again, I really appreciate it. I will post what I figure out.

tedmond

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Joined: January 06, 2007

Location: Ontario, Canada

Posted: April 09, 2010 at 6:01 AM / IP Logged

blanx they will only replace it if you are a dealer or certified dei installer

Ted

2nd Year Tier 1 Medical School

Still installing as a hobby...pays for groceries

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blanx218

Silver - Posts: 654

Joined: September 23, 2008

Location: Pennsylvania, United States

Posted: April 09, 2010 at 11:19 AM / IP Logged

I am both a dealer and certified installer. I send back stuff whenever needed and I'm sure there would be someone like myself in his area to do the same. There will be a shipping charge but its better than causing more wiring headaches or further damage to the unit

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dead siren output suggestions?

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