If you are not receiving speech on your 4+N monitor, please see below.
- If the fault is isolated to one monitor, check connections 1,2 and 6 of that monitor.
- If the fault is common to all monitors measure the voltage between the – and + terminals on the speaker/mic unit in the entry panel. The voltage should be 6V DC. Check that the polarity is correct.
- To test the operation of the speaker/mic unit proceed as follows – Remove the wires in terminals 1A and 2 of the speaker/mic (leaving the wires in – and + connected). Connect a monitor on a short cable directly to the speaker/mic as follows –
When you lift the handset you should have speech between the test monitor and the entry panel. If you do the fault lies in the wiring of the system.