RichardT

I'm trying to fix or replace components of a faulty 4-zone "Tate Fire and Security" fire panel. The panel now always registers "fire" on one of the zones. Internally, the main PCB is marked "1990 Securitech" and "T-S4/90". There are separate plug in cards for each of the 4 zones. It appears that it is one of the plug-in cards which is at fault as if I swap them round, it is always the same one that fails. Does anyone knows of a supplier of replacement "zone" cards? It appears that "Tate Fire and Security" have gone out of business (or perhaps they are now part of Tate Colson?) Ideally I would like to track down a circuit schematic to try to diagnose/fix the problem myself, though if anyone knows what is typically the source of such a failure, please reply. The zone card itself is a fairly small circuit with only 2 ICs: MC14011B (Quad 2-input NAND logic) and LM339 (Quad Voltage Comparator). Regards, Richard