QSC Audio ISA 500T manual

1
2
3
4

Go to page of

A good user manual

The rules should oblige the seller to give the purchaser an operating instrucion of QSC Audio ISA 500T, 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 ISA 500T 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 ISA 500T. 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 ISA 500T should contain:
- informations concerning technical data of QSC Audio ISA 500T
- name of the manufacturer and a year of construction of the QSC Audio ISA 500T item
- rules of operation, control and maintenance of the QSC Audio ISA 500T 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 ISA 500T 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 ISA 500T, 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 ISA 500T.

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 ISA 500T 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

  • Page 1

    1 ISA0001 T itle: ISA T urn-on Hangup Bulletin #: ISA0001 Issue Date: April 4, 200 2 Models Affected: ISA 750, 800T , 450, & 500T Bulletin Revision: A Production Range: 01/2000–04/2002 (serial # 0100xxxxx–0402xxxxx) Ser vice Bulletin Description The circuitry that controls protective current cutback in ISA amplifiers may in some instances c[...]

  • Page 2

    2 ISA0001 • Desoldering equipment or solder braid • Four 4.7-volt ¼ -watt zener diodes (Microsemi DZ840731ET/R; QSC part number QD-0004.7-ZT) T est equipment required: • Oscilloscope • 2-ohm resistive load (rated for at least 1200 watts) • Wire or other means of shorting the amplifier output • V ariable AC transformer (e.g., Variac, Po[...]

  • Page 3

    3 ISA0001 unsolder and remove it. Install and solder a new zener diode oriented in the same direction. Do the same with diode D210. 1 1. Check your work. Don ’ t reattach the channel module assembly and heat sink to the chassis yet. Instead, continue with the bias and current-limit calibration. New 4.7-volt zener Old 5.6-volt zener s n o i t a r [...]

  • Page 4

    4 ISA0001 and wait until it cools down to about room temperature. 6 . Measure the DC voltage across R147. Adjust bias trimpot R131 to reach the correct voltage shown in T able 1. 7 . Next, measure the DC voltage across R247. Adjust bias trimpot R231 to reach the correct voltage shown in T able 1. 8 . T urn off the amplifier and reattach the channel[...]