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 capacitors fail give this problem? Or is there a way to test ring in its speakers with short curcuiting some wires there.
It has 12C508A CMOS microcontroller, ZSR300 semiconductor, ZM331643 supply voltage monitor chips. Any of the chips or capacitors fail give this problem? Or is there a way to test ring in its speakers with short curcuiting some wires there.
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