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Remove power lead from the AC wall socket.
Remove top cover.
Locate the link pins (Marked jump 1, 2, 3 & 4) on the PCB behind each microphone XLR input
socket.
Connect the black shorting plug to the central pin and ON position to enable the Phantom
power.
6.4. CHIME
Wire between Mute and G (ground) terminals to activate the chime function ("Ding-Dong"
attention signal preceding a call). While this function is activated auxiliary inputs are attenuated.
The default chime volume is pre-set at the factory and is adequate for most applications.
6.5. TELEPHONE CONNECTION (TEL)
(TEL) input is for emergency announcements/signals and is not affected by the master volume
control. Input level can be set by rotary control on the rear panel. The TEL input has the highest
priority and will override all other inputs.
6.6. MOH (Music On Hold) OUTPUT CONNECTION
Two MOH outputs are provided with independent volume control and they aren't affected by the
master volume control. They are used to output only auxiliary signals.
600 Ω / 1 V to feed an EPABX system. Output level adjustable. Please consult your EPABX
handbook to use this facility.
8 Ω, 1 W for monitoring applications.
6.7. AUX (Line) CONNECTION
The equipment provides an auxiliary input that may be used for connecting other signal sources
such as a Radio Tuner, CD or Cassette player. LINE level Control is shared with the built-in Tuner
and CD. A rotary switch is located on the front panel for selection of Tuner, CD/Cassette, Aux and
OFF. The LINE level control operates on each of the input sources. To operate select the desired
music source using the rotary switch and turn the LINE control clockwise to increase the volume or
anticlockwise to reduce the volume.
The AUX input sockets are standard RCA phono, two sockets are supplied and these are linked
together internally, this allows stereo signal source to be used without the need to obtain a special
lead, however you may wish to check with the manufacturer of the signal source to ensure that no
damage will result if the left and right output channels are put in parallel.
A-5120M2 / A-5240M2 Version 1.1
A-5120M2 / A-5240M2
Amplifier
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