How to fix having no speech on a 4+N monitor

This article shows you how to fix the problem of having no speech on a 4+N monitor.

If you are not receiving speech on your 4+N monitor, this may be because of one of a few reasons. Check out the faults and solutions 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: