[Scantronix 9100 (fitted 1989) - viper problem]

Hello,

Bought a house with a working Scantronix 9100 system. That was in 2019. Today, I decided to open the main box and found the service paper record inside.

Serviced yearly from 1989 until 2014. 25 years and counting. I want to keep the system. I like '80.

 

Anyway - I am omitting ZONE 3 at the moment. It consists of 6 vipers. Since zone "3" is showing while arming I assume one of the vipers fails.

Without Zone 3 everything works just fine. 

 

I can use a multi meter, unscrew and connect a new Viper but I need to know which one is faulty ;) 

I don't know what is EOL, etc so please don't ask me that. Each of them is flashing red when knocked after couple seconds - this I have checked.

I also have a little switch under the main box that would reset flashing red leds on vipers.

 

I can visit them vipers by one and check with a multi meter but I would really appreciate a little help here as I have no clue which terminals I should measure.

Please help me if possible explaining what read on what pair of connectors would say a given viper is damaged. 

 

If you need any photos - just let me know and I will provide.

 

Thanks in advance.

Artur