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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of QSC Audio UF-3, 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.
What is an instruction?
The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of QSC Audio UF-3 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 QSC Audio UF-3. 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 QSC Audio UF-3 should contain:
- informations concerning technical data of QSC Audio UF-3
- name of the manufacturer and a year of construction of the QSC Audio UF-3 item
- rules of operation, control and maintenance of the QSC Audio UF-3 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 QSC Audio UF-3 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 QSC Audio UF-3, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the QSC Audio 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 QSC Audio UF-3.
Why one should read the manuals?
It is mostly in the manuals where we will find the details concerning construction and possibility of the QSC Audio UF-3 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
11 UF-3 UF-3 UF-3 UF-3 UF-3 Universal Universal Universal Universal Universal Filter Filter Filter Filter Filter *TD-004031-00* *TD-004031-00* Rev. A Owner’ s Manual[...]
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Page 2
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Page 3
1 I. DESCRIPTION The UF-3 is an embedded dual-channel universal filter accessory for use with select QSC power amplifiers. Compatible amplifier models and lines, both current and discontinued, include: • All PLX, two-channel CX, and two-channel DCA models (with a BSC-3 or BSC-5 BusCard installed) • All four-channel CX and DCA models (with a BSC[...]
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Page 4
2 III. PROGRAMMING THE UF-3 The UF-3 circuit board has six 3-pin headers and four SIP resistor network sockets (see Figure 2). All are used for programming the module. The circuitry for the two channels is identical, so the headers and sockets are divided between them: those designated by a three-digit number starting in a “ 1 ” (headers J101, [...]
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Page 5
3 Programming the High-Pass Filter and CD Horn Equalization To use either the high-pass filter or the constant-directivity horn equalization, or both, set the jumper on Jx02 across pins 2 and 3, which are the lower two pins on their header. If, however, you do not wish to use either one and want to bypass them instead, set the jumper across pins 1 [...]
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Page 6
4 IV . TYPICAL APPLICA TIONS Subsonic Filter Subsonic filters are commonly used in sound installations to filter out rumbles and other inaudible or unwanted low frequency signals and to protect speaker drivers. Vented speaker enclosures in particular often exhibit a phenomenon in which the acoustical damping on the driver(s) drops at extremely low [...]
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Page 7
5 Ultrasonic Filter An ultrasonic filter is useful for minimizing RF interference, oscillations, leakage or aliasing from digital devices, and other signals that are too high in pitch to hear but may wreak havoc in an amplifier system. Program settings: 1. Set the jumper on Jx01 to enable the low-pass filter (across pins 2 and 3). 2. Set the jumper[...]
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Page 8
6 2-Way Active Crossover This configuration routes the frequencies below a particular frequency to amplifier Channel 1, which shall drive the low-frequency speakers, and the frequencies above to Channel 2, which shall drive the high-frequency speakers. Using the UF-3 as a crossover requires that you drive both amplifier inputs with the same full-ba[...]
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Page 9
7 Ch. 2 Ch. 1 UF-3 PowerLight 1.6 HVX Ch. 2 Ch. 1 UF-3 PowerLight 3.4 (parallel mode) Ch. 2 Ch. 1 UF-3 PowerLight 4.0 (bridged mode) Ch. 1: Ch. 2 LP @ 150 Hz; HP @ 20 Hz Bypassed UF-3: Subwoofer Ch. 1: Ch. 2 LP @ 1000 Hz; HP @ 150 Hz LP @ 1000 Hz; HP @ 150 Hz UF-3: W oofers Ch. 1: Ch. 2 LP @ 5 kHz; HP @ 1000 Hz LP @ 20 kHz; HP @ 5 kHz UF-3: Mids &a[...]
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Page 10
8 Tools and materials you will need: Soldering iron Desoldering iron or other suitable desoldering equipment Phillips screwdriver Wire cutters Rosin-core solder CAUTION: • Do not use desoldering braid because it may damage the solder pads on the BusCard or input board, and it also might not adequately remove solder. • The UF-3 contains active c[...]
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Page 11
9 Continue preparing the PC board by removing solder from all 22 in-line socket holes. Once this is done, you are ready to install the UF-3. With the input panel facing you and the component side of the UF-3 board facing away from you, carefully insert the header pins of the UF-3 fully into the socket holes. Turn the assembly over and solder the UF[...]
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Page 12
10 VII. TECHNICAL ASSIST ANCE & SERVICE Servicing your QSC product requires a trained and qualified technician. There are no user serviceable components inside, and the danger of electric shock exists. Additionally, some of the components are QSC-specific parts that require QSC replacements. Comprehensive service manuals for most models are ava[...]
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Page 13
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Page 14
12 QSC Audio Products, Inc. 1675 MacArthur Blvd., Costa Mesa, California 92626 USA Tel: +1 714 754-6175 Fax: +1 714 754-6174 Web: www.qscaudio.com[...]