User manual PROEL PLLAS060

[. . . ] - Care should be taken so that objects do not fall onto and liquids are not spilled inside the product. Connect the apparatus to a power supply only with the power cord included: - Make sure that the power supply has a ground connection in working order. - The power supply cord should be unplugged from the outlet when left unused for a long period of time. In case of fault or maintenance this product should be serviced only by qualified service personnel when: - There is a flaw either in the connections or in the connecting cables. [. . . ] Any other servicing should be done by a qualified technician or by PROEL Service Department. DESCRIPTION The PMA120 has been designed for industrial use (factories, offices, public buildings) and for any PA application. It features three microphone inputs, a line input, two line outputs (pre and post-master fader), allowing input and connection with other systems. it also features tone controls for high and low frequencies. The first microphone input is fitted with phantom power supply and with "priority" function that automatically lowers all other input levels when signal is present at the first microphone input. The amplifier supplies a 120W power on the constant voltage output (100V) or, alternatively, on the low impedance output (8) and it features thermal protection. The PMA120 can be fed both by line power supply and 24VDC batteries. It can also be mounted on a 19" rack using the special brackets supplied with the unit. PACKING The packing of this product has undergone an integrity test according to ISTA 1A procedure. Warning: do not connect power supply cable to line socket before effecting all other connections. 13 EARTH CLAMP Amplifier must be connected to a 3-conductor power supply socket (earth contact). If using a power supply socket without earth contact, it is necessary to connect amplifier to ground by means of the fastening clamp. 14 24VDC POWER SUPPLY Amplifier can be powered by a 24VDC battery through + and ­ contacts. it is recommended to assure to correct polarity. When a battery is being used, the amplifier's output power reduces in relation to battery state. The ON/OFF switch does not control the amplifier's startup when it is being powered by a battery. It is recommended to use a battery with a current value able to grant amplifier operation for the time required (e. This input is fitted with phantom power supply; it is recommended not to use a microphone with unbalanced connector to avoid damage to the microphone. [. . . ] This input is fitted with phantom power supply; it is recommended not to use a microphone with unbalanced connector to avoid damage to the microphone. 16 TERMINAL BOARD MIC1 INPUT Microphone on MIC1 input can be alternatively connected on the 3-pole (+, -, GND) terminal board paying attention to polarities. When selector is ON, MIC2, MIC3/AUX, LINE levels automatically lower (attenuation -40dB) with signal on MIC1 input. 18 PHANTOM SELECTOR When this button is pressed, phantom power (+21VDC) on MIC1 is activated. [. . . ]