Technical support

Fault Finding Guide

Work through a few focused questions to identify the likely cause and find the relevant technical guidance.

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Choose the closest answerDoor Unit amplifier failed
200 Series Audio All phones No speech from the door Door Unit amplifier failed
Recommended guidance200 Series

What to check

Check the DC voltages at the door panel amplifier.

With the wires to terminals 'D' and 'E' disconnected check the voltage between '+' and 'D' and '+' and 'E' - Normal reading between 6-12v DC

Please note - there are two types of amplifier;

3 terminal - marked E, D and C and 4 terminal - marked +, -, E & D

NOTE: 'C' and '-' are the same and the terminal marking may be either or both.

As there is no '+' terminal on the 3 terminal amplifiers use the 12v + from either the lamp or the common wire to the push buttons

Corrective Action

If there is no voltages on D or E replace the amplifier.

Additional notes

3 terminal part ref: 92ETXAMP (pre 2015)

4 terminal part ref: 10ETXAMP (2015 on)

Note; from a preventative maintenance point-of-view we recommend replacing the speaker at the same time.

Links

https://www.entryphone.co.uk/shop/productdetail/92ETXAMP

https://www.entryphone.co.uk/shop/productdetail/PCB-10-ETXAMP

https://www.entryphone.co.uk/shop/productdetail/92-LS70

https://www.entryphone.co.uk/shop/productdetail/10-LS70


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