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The rules should oblige the seller to give the purchaser an operating instrucion of Dynacord DPA 4410, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.
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The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of Dynacord DPA 4410 one could find a process description. An instruction's purpose is to teach, to ease the start-up and an item's use or performance of certain activities. An instruction is a compilation of information about an item/a service, it is a clue.
Unfortunately, only a few customers devote their time to read an instruction of Dynacord DPA 4410. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.
What should a perfect user manual contain?
First and foremost, an user manual of Dynacord DPA 4410 should contain:
- informations concerning technical data of Dynacord DPA 4410
- name of the manufacturer and a year of construction of the Dynacord DPA 4410 item
- rules of operation, control and maintenance of the Dynacord DPA 4410 item
- safety signs and mark certificates which confirm compatibility with appropriate standards
Why don't we read the manuals?
Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of Dynacord DPA 4410 alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of Dynacord DPA 4410, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the Dynacord service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of Dynacord DPA 4410.
Why one should read the manuals?
It is mostly in the manuals where we will find the details concerning construction and possibility of the Dynacord DPA 4410 item, and its use of respective accessory, as well as information concerning all the functions and facilities.
After a successful purchase of an item one should find a moment and get to know with every part of an instruction. Currently the manuals are carefully prearranged and translated, so they could be fully understood by its users. The manuals will serve as an informational aid.
Table of contents for the manual
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Page 1
DPA 4410 POWER AMPLIFIER Features • 4 x 100 W output capacity • off ground potential 100 V outputs (internally configurable to 70 V/50 V or 4 ohms) • all outputs are protected against floating (no load) and short-circuit • mains supply 115/230 V AC or battery operation 24 V DC • mains switch 115/230 V • REMOTE CONTROL start with STANDBY[...]
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Page 2
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 ale[...]
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Page 3
INDICATORS, CONTROLS AND CONNECTIONS 1 LED meters 2 CLIP indicator 3 TEST button for checking and reset 4 STANDBY indicator 5 PROTECT indicator 6 GROUND FAULT indicator 7 READY indicator 8 air inlets 9 POWER on switch 10 AC MAINS INPUT connector 11 mains fuse 12 VOLTAGE SELECTOR switch 13 LEVEL 1- 4 input level controls 14 INPUT 1- 4 XLR-type conne[...]
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Page 4
TABLE OF CONTENTS FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 INDICATORS, CONTROLS AND CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . 19 1. GENERAL NOTES . . . . . [...]
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Page 5
1. GENERAL NOTES The amplifier DPA 4410 has been specially designed to ensure durable performance and rel iable operation of sound reinforcement systems with several independent speaker circuits. The DPA 4410 is best suited for call and message transmission installations, alert systems, and for gene ral music applications in industrial enterprises,[...]
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Page 6
4. INPUTS 1 - 4 The inputs 1 - 4 (14) are electronically balanced. With a sensitivity of 775 mV = 0 dB, t hey are meant for the connection of common control pre-amplifiers. In case off ground potential inputs are needed, the amplifier inputs are prepared to be retrofitted with input transformers of the type NRS 9 0208 (per input). Using the ROUTING[...]
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Page 7
5.2 POWER OUTPUT with 100 V speaker systems The use of speaker systems with a 100 V matching transformer is recommended to reduce the lack in performance when the distance between amplifier and speaker systems exceeds 50 m. This m ethod also offers an easy way of output power distribution. The total power consumption of the max imum amount of the c[...]
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Page 8
5.4 POWER OUTPUT 100 V with double output capacity If the output power of one output is not sufficient to feed all cabinets that are incorpor ated within a speaker network and it is not possible to divide the speaker chain, doubling the output power can be achieved by coupling the outputs of two DPA 4410. In that case the amplifier inputs are paral[...]
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Page 9
Diagram 6 Pin-assignment of the REMOTE CONTROL D-Sub connector 6. METERING The green LED indicator (1) permits the continuous monitoring of the output level, provid ing the possibility to prevent the speaker systems from overload situations and damaging. When during progra m peaks the red CLIP LED (2) lights briefly, the maximum distortion-free out[...]
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Page 10
Diagram 7 Changing the output transformer’s 354030 output voltage 9. ADDITIONAL FUNCTIONS AND FEATURES 9.1 NRS 90206 pilot tone surveillance Using the extension kit NRS 90206, the amplifier channels are automatically and continuous ly monitored. This is achieved by sending an ultra low-level 19 kHz pilot tone through the device. It enters the sig[...]
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Page 11
Checking the functioning: With built-in NRS 90206 and operational amplifier, the READY indicators (7) have to be lit. Use the TEST button (3) to check and reset the pilot function. When keeping the TEST button pressed, the 19 kHz oscillator is switched off, the READY indicators go out, and the READY fault relay is being reset. After approximately 3[...]
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Page 12
Diagram 9 Printed circuit board 81330.1 with inserted input transformers NRS90208 10. INCORPORATION INTO 19" FLIGHTCASES OR 19" RACK SYSTEMS Note Do not operate the DPA 4410 without its enclosure or without parts of the enclosure. When incorporating the DPA 4410 into a 19" flightcase or 19" rack system make sure, that ther e is [...]
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Page 13
Diagram 10 printed circuit board 85264.2 with inserted DC fuses F502 and F507 Changing the fuses F502 and F503: The battery fuses F 502 and F503 are located on the printed circuit board 85264.2, behind t he AMP battery connections. In case they need to be exchanged, the top cover plate (see also parag raph 8) and the rear cover plate of the applian[...]
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Page 14
12. SPECIFICATIONS OF THE DPA 4410 Mains supply: Voltage: 115 V / 230 V~ AC, ±10 Frequency: 50 - 60 Protection class: I mains supply Umains [V] Imains [A] Pmains [VA] Pmains [W] Pout [W] Pv [W] floating normal operation (-10 dB) alert (-3 dB) normal operation 230 230 230 230 0.27 1.64 3.25 4.39 62 377 748 1010 35 275 585 815 0 40 200 400 35 235 38[...]
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Page 15
Monitor output characteristics: unbalanced Nominal output voltage 2 V = +8.2 dBu Nominal load impedance 600 ohms Overall frequency response 60 Hz … 20 kHz Environmental temperature +5° C … +40° C Technical regulations: This appliance is in accordance with the following regulations: EN 50081-1, EN 50082-1, EN 60065 Dimensions (W x H x D) 19&qu[...]