User manual BIAMP CMA SERIES

[. . . ] TM CMA Series Commercial Mixer/Amplifiers Operation Manual Biamp Systems, 10074 S. W. Arctic Drive, Beaverton, Oregon 97005 U. S. A. an affiliate of Rauland Borg Corp. (503) 641-7287 www. biamp. com Print Update June 17, 2002 CMA Series TABLE OF CONTENTS Front Panel Features Rear Panel Features Modifications Applications Specifications Block Diagram Warranty pg. 13 integrated mixer, power amplifier, and output transformer five electronically balanced microphone/line input channels one transformer balanced microphone/line/tel input channel rear panel trim control & pad switch on each input channel +24 Volt phantom power selectable on each input channel imput transformer option on mic/line inputs (except CMA350) automatic muting of selected channels (-10, -20, or -40dB) automatic muting triggered by selected "priority" channels manual muting of selected channels (-10, -20, or -40dB) manual muting triggered from remote contact closures remote control of master level via rear panel terminals integral output compressor with rear panel threshold control recessed treble & bass controls plus "loudness" & "low-cut" two insert points for signal processing and remote control two line-outs and one stack-in for system interconnections 30, 60, 120, or 350 Watts into direct or distributed systems front panel indicators for power, fault, signal, and peak internal 'pre-announcement' chime tone with level control input/output connections provided on barrier strip terminals integral security cover and removable rack-wing/handles covered by Biamp Systems' five-year warranty marked, UL and C-UL (UL Canada) listed INTRODUCTION The CMA Series of commercial mixer/amplifiers combines a versatile 6-input mic/line mixer with either 30, 60, 120, or 350 Watt amplification. Mixing functions include mic/line/telephone inputs, selectable automatic & manual channel muting, channel priority assignment, remote level control, tone control, a built-in compressor, an internal chime, phantom power, and extensive output patching. [. . . ] Switches simply connect (or disconnect) "+10V" to "C", and do not require a ground (` ') connection. NOTE: The factory installed jumper (between "+10V" & "C") must be in place when a remote control is not being used. Mute/Chime: This screw terminal (plus " ") allows manual muting of any selected channels, via an external switch or contact closure (see Assignment & Priority below). When the Chime Level control is turned up (on), a pre-announcement chime tone will also be activated by the switch or contact closure. Stacking In: These screw terminals provide a balanced line-level input to the mix bus, for input expansion. Stacking In is before Loudness, Tone, Compressor, Master Level, & Low Cut. For unbalanced input, wire high to (+) and ground to both (-) & ( ). Assignment: These five DIP switches are used to assign specific functions to the individual channels. To assign a function, move the respective switch to the left. Phantom Pwr assigns +24 Volts DC phantom power to the channel input, for powering condenser microphones. CAUTION: TO AVOID DAMAGE TO EQUIPMENT, ASSIGN PHANTOM POWER ONLY ON CHANNELS WHICH ARE SELECTED FOR 'MIC' INPUT AND WHICH REQUIRE PHANTOM POWER. To remove the rack-handles: 1) Remove the two screws from the side of each rack-handle. 3) Replace the mounting screws in the sides of the chassis. Security Cover: The CMA Series includes a removable front panel security cover. A hole in the security cover provides access only to the power switch. To remove the security cover: 1) Using a 3mm hex wrench, loosen the two captive security cover mounting screws. 2) Remove the security cover. 6 MODIFICATIONS WARNING: TO REDUCE THE RISK OF SHOCK, DISCONNECT ALL POWER FROM THE UNIT BEFORE MAKING ANY INTERNAL MODIFICATIONS OR EXTERNAL FIELD WIRING CONNECTIONS. 115V/230V AC Operation: The CMA Series may be converted to 230V operation for use in other countries. To convert to 230V operation: 1) Remove the fuse holder compartment from the lower portion of the rear panel AC Power Cord receptacle. 2) Replace the fuse in the fuse clip with the same type and appropriate value fuse (see table below). 3) Replace the fuse holder compartment. 230V fuse values CMA30 - 1A NB 250V CMA60 - 2A NB 250V CMA120 - 3A NB 250V CMA350 - 3. 15A SB 250V USE ONLY WITH 250V FUSE 4) Select the 230V position on the Power Selector Switch. The Power Selector Switch for models CMA30, CMA60, & CMA120 is recessed into the underside of the chassis, near the AC Power Cord receptacle. The Power Selector Switch for model CMA350 is instead located on the left side of the rear panel, above the AC Power Cord receptacle. rear panel bottom panel 115V 230V AC Fuse: The AC Fuse is in the lower portion of the AC Power Cord receptacle. If the AC fuse should require replacement, see table below for proper value. [. . . ] mute mix input xformer Channel 1 (mic/line/tel) + telephone mic/ line phtm. power level loudness -40dB -20dB -10dB priority rec out trim CMA 120 Block Diagram send/ return bass treble stacking input + level amp in pre out auto. mute input xformer (option) + mic/ line phtm. power level threshold compressor trim chime signal peak remote control master level low-cut fault Channels 2 thru 6 (mic/line) power amplifier 4 8 25V 50V 70V* com *100V output available (export option) threshold -40dB -20dB -10dB priority auto. 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