User manual MARTIN AUDIO MA1400

[. . . ] CONTENTS < > PRINT GUIDES Page No 1 2 2 2 2 2 2 3 3 3 3 4 4 4 5 5 5 6 6 6 6 6 6 6 7 7 7 8 8 8 8 8 9 9 10 10 10 10 11 12 12 12 12 12 13 13 13 13 13 13 13 14 14 15 16 CONTENTS (ENGLISH) 1 CONTENTS MA1400 USER GUIDE 2 APPROVALS 3 WARNINGS 3. 1 EXPLANATION OF GRAPHICAL SYMBOLS 3. 2 WARNING 3. 3 CAUTION 3. 4 IMPORTANT SAFETY INSTRUCTIONS 3. 5 USER RESPONSIBILITY 3. 5. 1 LOUDSPEAKER DAMAGE 3. 5. 2 SPEAKER OUTPUT HAZARD 3. 5. 3 RADIO INTERFERENCE 4 INTRODUCTION 4. 1 UNPACKING 4. 2 FRONT PANEL 4. 3 REAR PANEL 5 REAR PANEL FEATURES 5. 1 GAIN SWITCH 5. 1. 1 THE DIP-SWITCH 5. 1. 2 SENSITIVITY 5. 1. 3 OPTIONS 5. 2 LINK SWITCH 5. 3 OPERATING MODES 5. 3. 1 STEREO MODE 5. 3. 2 NOTES FOR AMPLIFIER TESTING 5. 3. 3 TANDEM MODE 5. 3. 4 BRIDGE MONO MODE 5. 3. 5 BRIDGE MONO MODE FEATURES 6 INSTALLATION 6. 1 MOUNTING 6. 2 COOLING 6. 3 OPERATING VOLTAGE 6. 4 GROUNDING 6. 5 POWER CONSUMPTION 6. 5. 1 CALCULATION 7 CONNECTIONS 7. 1 INPUT CONNECTIONS 7. 1. 1 BALANCED INPUTS 7. 1. 2 UNBALANCED INPUTS 7. 2 CONNECTING SPEAKERS 8 OPERATION 8. 1 OPERATING PRECAUTIONS 8. 2 POWERING UP ­ SOFT START 8. 3 INPUT ATTENUATORS 8. 4 INDICATORS 9 PROTECTION FEATURES 9. 1. 1 OUTPUT LIMITER 9. 1. 2 THERMAL PROTECTION 9. 1. 3 VHF PROTECTION 9. 1. 4 SHORT CIRCUIT PROTECTION 9. 1. 5 AC MAINS VOLTAGE PROTECTION 9. 1. 6 DC PROTECTION 10 MAINTENANCE 10. 1 TROUBLESHOOTING 11 WARRANTY 12 SPECIFICATIONS MA1400 ENGLISH All material © 2007. Subject to change without notice. 1 Martin Audio ­ MA1400 Amplifier CONTENTS < 2 > PRINT GUIDES ENGLISH APPROVALS This equipment conforms to the requirements of the EMC directive 89/336/EEC, amended by 92/31/EEC and 93/68/EEC and the requirements of the Low Voltage Directive 73/23/EEC, amended by 93/68/EEC. Standard Applied EMC Emission EMC Immunity Electrical Safety EN55103-1, E3 EN55103-2, E3, with S/N below 1% at normal operation level. EN60065, Class 1 3 3. 1 WARNINGS Explanation of graphical symbols The lightning symbol within a triangle is intended to alert the user to the presence lethal voltages within the amplifier that are of sufficient magnitude to constitute a risk of electric shock to humans. 3. 2 WARNING The exclamation mark within a triangle is intended to alert the user to presence of important operating and service instructions in the literature accompanying the product. 3. 3 CAUTION ! To reduce risk of fire or electric shock, do not expose this apparatus to rain or moisture. To reduce the risk of fire or electric shock, do not remove screws. There are no user-serviceable parts inside this amplifier. [. . . ] There is no need for spacing between units. If it is the intention to fill a rack with amplifiers, we recommend racking is started from the bottom of the rack. It is also recommended that rear supports are used for amplifiers mounted in the middle of the rack, especially if used as part of a portable system. 6. 2 Cooling Your amplifier uses a forced air cooling system to maintain a low and even operating temperature. All fan cooled MARTIN AUDIO MA Series amplifiers have front to rear cooling. Never try to reverse the airflow, as the amplifier needs a pressure chamber between the fans and heat sink, and this only operates in one direction of the airflow. Make sure that there is an adequate air supply in front of the amplifier, and that the rear of the amplifier has sufficient space to allow the exhaust to escape. If the amplifier is rack-mounted, do not use covers or doors on the front or rear of the rack. If the heatsink temperature rises too high, its sensing circuit will mute the hot channel. If the power supply overheats, another sensing circuit will mute both output channels, until they cool down to a safe operating temperature For installations with a central cooling system, usually found in fixed installations with a dedicated rack room, it may be necessary to calculate the maximum heat emission. never rack different makes of amplifier together that have opposing air flow characteristics. 6. 3 Operating voltage WARNING!A label just below the mains cable on the rear of the amplifier indicates the selected AC mains operating voltage. Connect the mains cable only to the AC source referred to on the label. The warranty will not cover damage caused by connecting to the wrong type of AC mains. If the power plug is not appropriate for your country, it can be cut off and re- wired to a suitable connector in the following way: BLACK or BROWN WHITE or BLUE GREEN or GREEN/YELLOW LIVE NEUTRAL EARTH Once connected to a suitable AC supply, the amplifier can be started with the power switch. When you power up the amplifier it takes a couple of seconds to self check (this is known as the "soft start" or "slow start" sequence), the fans then blow at high speed before going into "idle". The two bottom green LED's then illuminate to show the amplifier is operational. 6. 4 Grounding There is no ground lift switch on this amplifier. The signal ground is always floating (lifted), with respect to chassis ground via a ground lift resistor. If a potential difference above 0. 6V is detected between signal ground and chassis earth, a short circuit is automatically introduced between the two, ensuring electrical protection. If other equipment or amplifiers within a system should develop an electrical fault to earth, the mains fuse on that equipment should rupture due to this automatic system allowing an earth fault current to flow for protection purposes. If however you wish to permanently connect the signal ground to chassis earth, connect the XLR-connector's shell lug to pin 1. In the interest of safety never disconnect the earth pin on the mains cable. To comply with CE approval (radio interference), there is an AC mains filter. This filter needs the chassis earth for reference, otherwise a current loop is formed via the signal ground. [. . . ] Fault: The amplifier goes into protection with power indicators off. Check that the AC mains voltage is within the amplifier's operating range, 130-265V@ 230V, and (65-135V @ 115V). Over/under-voltage protection may have occurred. If the amplifier is connected by mistake to a 3-phase supply, an internal non-resetable fuse or resistor may have blown. [. . . ]