Recent content by SKhlane

Yes, I can hear the ring from the main intercom unit. When short circuiting 0V and DS green LED turns on, just wanted to identify pins. DS – Door Status DR – Door Release VT – DC in 12V BZ – Buzz input S2 - Mic S1 - Speaker 0V – Ground The cables for the handle; black and yellow are ground as...

Privacy button which has red, led turns on when i press it and there green led works too for when someone opens the main door. So i guess voltage does come to the unit, we can eliminate blown fuse. There are 4 cables going to speaker & mic inside the handle. There is nothing else inside the...

I have this Entrotec ED4 handset unit and i don't hear ring here. What could be the problem? Theres nothing wrong with wiring. Is this common, did anyone had this problem? It has 12C508A CMOS microcontroller, ZSR300 semiconductor, ZM331643 supply voltage monitor chips. Any of the chips or...