Summary of Contents for DIGAM L SERIES
- Page 1 Digital Audio Amplifier for Professional Applications User Manual V 1.1 (27/4/2005)
- Page 3 Table of contents This page left intentionally blank...
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Page 4: Important Safety Instructions
Important safety instructions CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: To reduce the risk of electric shock, do not remove the cover. No user-serviceable parts inside. Refer servicing to qualified service personnel. KEEP THIS INSTRUCTIONS SAFEGUARDS: Electrical energy can perform many useful functions. This unit has been engineered and manufactured to assure your personal safety. -
Page 5: Speaker Damage
Speaker output shock hazard A DIGAM amplifier is capable of producing hazardous output voltages. To avoid electrical shock, do not touch any exposed speaker wiring while the amplifier is operating. This manual contains important information on operating your DIGAM amplifier correctly and safely. -
Page 6: More Sound And Less Weight
Totally Digital with High Reliability The DIGAM series is based on PWM technology that has been used for 30 years or more in power supplies and inverters. PWM provides high reliability, small size, low weight and high efficiency. A PWM converter works as a high frequency sampler, converting the variable amplitude (audio) signal into an impulse sequence with average value equal to the audio input. -
Page 7: This Manual
1 Installation and operation 1.1 Unpacking Carefully open the shipping carton and check for any noticeable damage; t he figure below shows the view of the packing. Every Powersoft amplifier is completely tested and inspected before leaving the factory and should arrive in perfect condition. -
Page 8: Operating Precautions
1.2 Mounting All DIGAM amplifiers will mount in a standard 19" rack. Four front panel mounting holes are provided. Your DIGAM amplifier uses a forced-air cooling system to maintain a low, even operating temperature. Drawn by an internal fan, air enters through the slots in the front panel and courses over and through components. - Page 9 Warning: before removing the cover, turn off the power switch; unplug the mains cable and wait for 10 minutes. The Digam L series accepts 115V or 230V mains voltage. To set up the correct voltage unscrew the screws on the top and on the lateral side of the unit and remove the cover and plug the small cable showed in the figure 1.5.1 to the correct male...
- Page 10 1.6.1 Mounting DSP module(s) The correct operations for mounting a DSP module is shown in the figures below; the first operation is to insert the module vertically with the component side shown in the figure 1.6.2 in the caveat of the SIMM socket with a weak pressure, then rotate the module until the fingers have jammed it (figure 1.6.3).
- Page 11 1.6.3 Dip switch settings The figure below shows the dip switch settings for any aperating mode of the amplifier DSP NOT INSTALLED CH1-2 CH3-4(LQ ONLY) 2 3 4 2 3 4 SW102 SW302 DSP INSTALLED CH1-2 CH3-4(LQ ONLY) 2 3 4 2 3 4 SW102 SW302...
- Page 12 1.7 Connecting Inputs . Input connections are made via the 3-pin XLR-male type on the rear side of the amplifier. The connection for "LQ" model (four channels) is shown in figure 1.7.1; on the right side of the figure is shown the polarity of the XLR connector.
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Page 13: Connecting Outputs
1.8 Connecting Outputs Warning: there are lethal voltages at the loudspeaker connectors when the amplifier is turned on. To prevent any damages turn the amplifier off before connecting the loudspeker Output connectors are made via neutrik speakon connectors. Consult the wire gauge chart to find a suitable wire gauge to minimize power and damping factor losses in the speaker cables. -
Page 14: Setup And Settings
2.1 Introduction The figure below shows the front panel of DIGAM L Series. The front panel controls and indicators give to the user the total control and detailed information about the status of the amplifier. The gain control use a logarithmic scale from - to +32dB. -
Page 15: Input/Output Protection
3.3 Thermal protection A DIGAM amplifier uses a continuously variable speed fan to assist cooling (the fan speed changes in response to the amplifier's cooling needs). If the heatsink temperature reaches approximately 75°C, the "TEMP" LED lights up, and the otput power is reduced to prevent damages to the output stage. -
Page 16: Dust Removal
4.3 Dust removal Especially in a dusty environment, the front side filters clog with dust after prolonged use, this will interfere with cooling. You may use compressed air to remove the dust from filters. To remove air filters see fig(4.3.1) , unscrew n°3 M3X6 screws and pull off the covering grill. -
Page 17: Warranty And Disclaimers
5.2 Product warranty Powersoft guarantees the DIGAM to be free from defective material and/or workmanship for a period of two year from date of sale, and will replace defective parts and repair malfunctioning products under this warranty when the defect occurs under normal installation and use - provided the unit is returned to our factory via prepaid transportation with proof of purchase (sales receipt). -
Page 18: Technical Notes
7 Technical notes 7.1 Block diagram The figure 7.1.1 shows the amplifier block diagram. SIGNAL INPUT LFRONT DGMDSPA DGMCONTROL LMAIN DGMCONTROL VOLUME CONTROL OPTIONAL DSP DGMCONTROL DIFFERENTIAL INPUT EMI FILTER LIMITER CIRCUIT & DISPLAY BOARD ERROR AMPLIFIER AMPLIFIER LMAIN DGMCONTROL DGMCONTROL DGMCONTROL LMAIN... -
Page 19: Technical Specifications
7.2 Technical specifications POWER REQUIREMENTS Power supply (LD).………........…... AC 115V or 230V (internal selection), +15 / -25%, 50-60Hz, 400VA Power supply (LQ).………........…... AC 115V or 230V (internal selection), +15 / -25%, 50-60Hz, 700VA 45°C Operating temperature..............……..............0°C Weight ........………...…………........…..……............7.3Kg External dimensions ..................