Natcom Ireland Ltd
Natcom Ireland Ltd
























Analogue Audio

No Call
• Check there is a link between –6 and ~0 terminals of 786/11 power supply.
• Check connection from PS terminal (call tone output) of 786/11 power supply to common side of call buttons. (For multi entrance systems contact Technical Support).
• To test the operation of the power supply, connect a handset directly to the power supply as follows –
Handset / Power supply
6 -6
When you push the cradle switch down on the handset, the handset should ring. If it does the fault lies in the wiring of the system.

No Speech
• If the fault is isolated to one handset, check connections 1,2 and 6 of that handset.
• If the fault is common to all handsets 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 handset on a short cable directly to the speaker/mic as follows -
Handset Speaker/mic
6 -
1 1A
2 2
When you lift the handset you should have speech between the test phone and the entry panel. If you do the fault lies in the wiring of the system.

No Lock Release
• The lock release output from the 786/11 power supply is 12V AC @ 2.4A.
• Measure between the ~0 and ~12 terminals of the power supply. The voltage should be at least 12V AC.
• Remove the two connections from the lock release; connect your meter to the two wires. When the lock button on the handset is pressed your meter should read 12V AC.


Natcom Ireland Ltd

Natcom Ireland Limited || Kenilworth House, Kenilworth Road, Dublin 6, Ireland

PSA Licence 05036

Telephone 01 497 7877 ::: Facsimile 01 497 7254 :::