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<blockquote data-quote="Vipersan" data-source="post: 1000865" data-attributes="member: 325666">Approx 1 hour ago we had a brief power cut ..about 2 seconds at most...but it was enough to set every alarm in the area wailing ..including mine ..which sadly did not re-set ...a neighbour brought it to my attention that it was driving her nuts ..so ..went home and checked ..The normally illuminated panel was dark ...even after restoring the mains which had tripped.I opended up the cover and pulled the main fuse..thus removing any power to the pcb ..This stopped the internal noise ...but triggered the oudoor 'bell box to run oscillate at a different rate.I know this external box has it's own battery supply so I guess it would eventually have run flat ...but so as to appease the neighbours ..got the ladders out and climbed up to open the bell box and pull it's battery.So ..it could well be the main pcb is damaged ..but more likely the internal alarm battery needs changing (12v 2.1AH) ..I removed it and inspected it ..and conclude it looked a bit sick ..having a warped and slightly blistered outer shell ..So got one of these sealed lead acids on order cost around £15 ..which might get it up and running again ...But I will need a service manual to reset everything..Can anyone help ?The unit is a good few years oldOriginally purchased from CPCIdentified as Scantronic model 7448+Anyone ?</blockquote>

[QUOTE="Vipersan, post: 1000865, member: 325666"] Approx 1 hour ago we had a brief power cut .. about 2 seconds at most... but it was enough to set every alarm in the area wailing .. including mine .. which sadly did not re-set ... a neighbour brought it to my attention that it was driving her nuts .. so ..went home and checked .. The normally illuminated panel was dark ...even after restoring the mains which had tripped. I opended up the cover and pulled the main fuse..thus removing any power to the pcb .. This stopped the internal noise ...but triggered the oudoor 'bell box to run oscillate at a different rate. I know this external box has it's own battery supply so I guess it would eventually have run flat ...but so as to appease the neighbours ..got the ladders out and climbed up to open the bell box and pull it's battery. So ..it could well be the main pcb is damaged ..but more likely the internal alarm battery needs changing (12v 2.1AH) .. I removed it and inspected it ..and conclude it looked a bit sick ..having a warped and slightly blistered outer shell .. So got one of these sealed lead acids on order cost around £15 ..which might get it up and running again ... But I will need a service manual to reset everything.. Can anyone help ? The unit is a good few years old Originally purchased from CPC Identified as Scantronic model 7448+ Anyone ? [/QUOTE]

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