Optimus UP120M4 Manual page 11

UP120M4 AMPLIFIER
1. INTRODUCTION.
The UP-120M4 model is made up of 4 amplifiers of 120 Watts R.M.S. each, housed in the same
frame.
Suitable for use in public address installations, emergency paging, background music and
speech reproduction systems. Their toughness and reliability must be outlined as well.
Each amplifier includes a protection against short-circuits / over-loadings in the loudspeakers
line, as well as a thermal protection to avoid damages due to over-heating.
They occupy 3U when mounted in a 19" Standard Rack Cabinet. When Rack mounted, it is
recommended to install 1U perforated panels between them.
2. FRONT VIEW.
(1) LEVEL INDICATORS.
To indicate the power delivered to the line.
The LED marked as 0 dB indicated the
maximum power given by the amplifier.
(2) PRIORITY INDICATORS.
They light when the Priority channel is
selected, it is: when the pin n. 6 is joined
to the pin n. 8 in the RJ45 connector of the
Priority Input.
Fig. 1
(3) PROTECTION INDICATORS.
They light when the Protection is operating
due either to an over-loading or to a short-circuit in the loudspeakers line.
(4) VENTILATION INPUT.
Do not obstruct under no circumstances.
(5) PRIORITY INPUTS VOLUME CONTROLS.
Turn them clockwise to increase the volume of the Priority channels. The potentiometers can be
adjusted by using a screwdriver.
(6) PROGRAM INPUTS VOLUME CONTROLS.
Turn them clockwise to increase the volume of the Program channel. The potentiometers can
be adjusted by using a screwdriver.
(7) ON/OFF LED INDICATOR.
It lights when the amplifier is in operation, either by Battery or Mains.
(8) ON/OFF SWITCH.
It switches on/off the amplifier only if the power is supplied by the 230 Vac mains. This switch is
not operational when the amplifier is supplied by battery.
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UP120M4