User manual ELECTRO-VOICE DPA 4411
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Manual abstract: user guide ELECTRO-VOICE DPA 4411
Detailed instructions for use are in the User's Guide.
[. . . ] OWNER'S MANUAL
POWER AMPLIFIER DPA 4411
Features Power amplifier with 4x100 W output power capacity according to IEC 283-3 19" - rack size (3 HU) unit that provides the following functions: · · · · · · · · · · · · · · · · · · · · Mains operation 115/230 V AC and operation with emergency power supply of 24 V DC Output transformers for balanced, floating 100 V loudspeaker networks: 70 V, 50 V or 4 ohms for low-impedance operation can be selected All outputs are protected against idling and short-circuit Integrated Remote Module for control and monitoring using the PROMATRIX Manager DPM 4000 Electronic level controls, electronically balanced inputs and electronically balanced MONITOR output Input transformer for balanced, floating inputs can be retrofitted Monitor output transformer for balanced, floating MONITOR output can be retrofitted Routing switch for parallel operation of the amplifier's inputs Integrated Standby Power Supply Mains function switch - POWER Ground lift switch Remote-Start function for mains and battery operation with inrush current limiter protection Power-on noise attenuation Status-LED indicators: operation (READY), STANDBY, thermal overload (PROTECT) and GROUND FAULT at the power outputs Fault notification according to DIN EN 60849 via the PROMATRIX Manager DPM 4000 TEST-switch for systems with average-switching or GROUND FAULT RESET LED meters with a range from -13 dB to 0 dB plus CLIP indication Mains voltage selector switch 115/230 V AC Active, temperature-controlled ventilation Modules for pilot tone surveillance and ground fault surveillance according to DIN VDE 0800 are optionally available
IMPORTANT SAFETY INSTRUCTIONS
The lightning flash with arrowhead symbol, within an equilateral triangle is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintance (servicing) instructions in the literature accompanying the appliance.
1. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus that produce heat. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
For US and CANADA only:
Do not defeat the safety purpose of the grounding-type plug. [. . . ] The power amplifier keeps up normal operation during the occurrence of this fault-type. After solving the problem, the GROUND FAULT indicator (6) can be reset by pressing the TEST button (3) or by sending the corresponding command via the serial port of the PROMATRIX Manager DPM 4000 (see PROMATRIX handbook) (see paragraph 9. 2). 7. 5 Meter Instruments And CLIP Indicators The green LED-indicator -13 dB and 0 dB (1) as well as the red LED-indicator CLIP (2) allow the precise monitoring of output levels, providing the possibility to securely prevent distortion and clipping that could lead to damaging the connected loudspeaker systems. - When during program peaks the red CLIP-LED (2) lights briefly, the maximum distortion-free output is gained. - Whenever the CLIP-LED (2) lights continuously, the amplifier is driven into overdrive and the input level should be reduced. - Overload or short-circuit at the output is the cause for the green LED-indicator (1) to be out or only briefly lit while at the same time the red CLIP-LED (2) blinks. Caution During normal operation, the red CLIP-LED (2) should hardly light and if, than only very briefly !
7. 6 STATUS Indicator The yellow STATUS-LED (14) that is located on the rear of the appliance lights briefly during normal operation when the DPM 4000 addresses a query to the amplifier. Switching The Output Voltage (refer to qualified service personnel only!) The DPA 4411 offers output voltages of either 20 V, 50 V, 70 V or 100 V. Switching the output voltage to 20 V, 50 V or 70 V should only be carried out by qualified DYNACORD service personnel. Caution Unplug the mains cord and disconnect batteries before opening the appliance!
- for opening the appliance, please remove the 9 screws on the top of the appliance that lock the cover plate. - the four output transformers 356762 are located on the left hand side of the appliance. They are numbered 1, 2, 3, and 4; starting from the rear cover plate of the appliance. - for changing the output voltage (see diagram 6) you have to unsolder the orange wire attached to the transformer's soldering tab 19 (100 V) and solder it instead to the required soldering tab (70 V, 50 V or 20 V). - closing the appliance: use the 9 screws M3 x 6 DIN 7500 to reattach the cover plate.
Switching the output voltage at the output transformers 356762
Output configuration settings of the amplifiers (rear view)
After changing the output voltage, use a waterproof marker pen to note the correct, newly set value on the label-field OUTPUT VOLTAGE (20) on the rear of the appliance. Additionally note the corresponding output configuration (see diagram 5) on the label OUT CONFIG TYPE (20). According to the description in diagram 7, adjust the switches S801 and S802 on the printed board assembly 89019. 2 that are located next to the transformers on the bottom of the appliance's enclosure (refer also to paragraph 5. 4 ).
Printed board assembly 89019. 2 showing the position of the switches S801 and S802
9. Additional Functions And Features (refer to qualified service personnel only!) 9. 1 NRS 90206 Pilot Ton Surveillance Using the extension-kit NRS 90206 provides continuous monitoring (surveillance) of the individual amplifier channels. This is achieved by sending an ultra low-level 19 kHz pilot tone through the device. It enters the signal path post level controls, runs through the amplification stages and gets filtered out and evaluated at the output. In case the result of this evaluation shows that the pilot dropped beneath a defined threshold or is missing at all, the corresponding READY indicator AMP 1 - 4 (7) goes out but the power amplifier upholds its normal operation. A fault-message is transmitted to the PROMATRIX Manager DPM 4000 (see PROMATRIX handbook). The extension-kit NRS 90206 comes as a plug-in board assembly and consists of a 19 kHz tone-generator and four selective 19 kHz receivers with evaluation stage. [. . . ] 19"-Flightcase Or 19"-Rack System Installation Caution Operating the DPA 4411 without cover-plate is not admissible.
When incorporating the DPA 4411 into a 19" flightcase or 19" rack system, make sure to leave room for sufficient air-flow. Between the amplifier's rear plate and the inside-wall of the surrounding enclosure has to be at least 60 mm x 330 mm of space until up to the enclosures top or its ventilation gaps. At least 100 mm of space should be left above a rack system to guarantee sufficient air circulation. Since, during the operation of the DPA 4411 the environmental temperature within the rack closet may increase by about 10° C, minding the maximum allowable temperature values for other equipment that is installed into the same rack system or enclosure is of major importance. [. . . ]
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