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The rules should oblige the seller to give the purchaser an operating instrucion of JBL Ceiling Loudspeakers, 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 JBL Ceiling Loudspeakers 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 JBL Ceiling Loudspeakers. 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 JBL Ceiling Loudspeakers should contain:
- informations concerning technical data of JBL Ceiling Loudspeakers
- name of the manufacturer and a year of construction of the JBL Ceiling Loudspeakers item
- rules of operation, control and maintenance of the JBL Ceiling Loudspeakers 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 JBL Ceiling Loudspeakers 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 JBL Ceiling Loudspeakers, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the JBL 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 JBL Ceiling Loudspeakers.
Why one should read the manuals?
It is mostly in the manuals where we will find the details concerning construction and possibility of the JBL Ceiling Loudspeakers 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
Control Contractor Ceiling Loudspeakers Ow ner’s Manual[...]
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1 Table of Contents Product Descript ion ......................................................................................... 2 Product Feature Ident ification ......................................................................... 3 Installati on Preparations ..................................................................................[...]
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2 Thank you for purchasing JB L Control Contractor ceiling loudspeakers. Read through this manua l to familiarize y ourself with the feature s, applications and precautions before you use these prod ucts. Product Descriptions The JBL Control Contractor ceiling loudspeakers utilize innovative design and materials to provide pre mium level performanc[...]
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3 Product Feature Identific ation Attachment Screw s Tap Selector (on T-versions) Loudspeaker Di Seism ic T ab (secondary support point) Perforated Pre ss - In Grille Steel Backcan Rotating Mounting T abs JBL Logo Removable Lockin g In p ut Connector Strain Relief Fitting Terminal Cov er Plate Assembly ( Control 24C Shown)[...]
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4 Installation Prepar ations The entire installation can be accomplished, if nece ssary, without requirin g access above the ceiling. Bracketr y for use with either suspended ceilin gs or sheetrock ceilings is included. The speaker is held securel y in place via mounting ears which lock into place. Inputs are attached to a removable lockin g connec[...]
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5 2) The optional PLASTER-RING BRACKET (or “mud ring”) contains a circular offset, forming a edge guide for sheet rock plastering. The bracket has wings that attach to the building structure. Sheet rock is typicall y either precut or cut with a rotary cutting tool using the outside of the plaster ring circle as a guide. The sheet rock hole is t[...]
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6 STEP-BY-STEP INSTALLATION AND WIRING The installation sy stem has been de signed so that the entire insta llation can be accomplished from beneath the ceilin g, for instances when ac cess above the tile is not possible or practical. Howe ver, in some cases it may be easier with remova ble ceiling tiles to access from both the top and bottom of th[...]
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7 Tile Rails: The tile rails are designed to fit either s tandard 24-inch wide tiles or 600-m m wide tiles. The tile rail pieces do NOT p hysically attach to the T-grid struts. Instead, the inverted-V shape at the ends of the rails sit OVER the T-g rid strut. Du ring normal operation , the rails are s upported by th e edge of the tile. In the unlik[...]
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8 Guide to th e Pins for Con nection -- The removable locking input connector contains 4 terminals, as marked on the conn ector. The pin functions are listed on the label locat ed on the term inal cover pl ate. Pins 2 & 3 are the “+” and “-” inputs to the loudspeake r. Pins 2 & 3 are looped to pins 1 & 4, respectivel y (Pin 1 co[...]
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9 Using Loop-Through Terminals (P ins 1 & 4) - - B y connecting the wire pair of the subsequent spea ker to pins 1 & 4, then all subseque nt speakers will be disconnected when this speaker’s conn ector is disconnected durin g for troubleshooting,. This can be useful as a wa y to isolate problems to a section of the distributed line while [...]
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10 Step 5 – Tighten the Strain Relief Fitting & Close the Terminal Cover First, remove the horizontal screw indic ated in the drawing below. Next, loosen the screws holding the fitting’s sliding pieces onto the input-terminal cover b y about a half turn. Run the wires through the opening in the fitting. Figure 12: Opening t he Strain- Relie[...]
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11 The strain relief can be tightened in two wa ys, choose whichever is b est for your application: a) Tightening onto plenum cable or bare wire -- Slide the wiring through the strain relief fitting on the termina l cover plate. In the case of bare wire and plenum cable it is often possibl e to provide accepta ble strain r elief force b y simply ti[...]
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12 b) Tightening o nto flexib le or hard c onduit – The supplied fitting accommodates up to 3/8 inch (9.5mm) flexible conduit. S lide the wiring through the strain relief fitting on the terminal cover plate. Insert the conduit into the strain relief fitting . Reinsert the horizontal screw that was previously removed. Use the two horizontal screws[...]
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13 Step 6 – Insert the Speaker Into the Ceiling and T ighten . Insert the speake r into the ceiling as far as it goes, until the front baffle rim touc hes the ceiling . Turn the attach ment screws to tighten the mounting ta bs, by using the following directions: IMPORTANT -- For each attachment screw, F IRST turn ½ turn COUNTER-CLOCKWISE to rele[...]
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14 Model Number of Attachment Screws Control 24C & 24C T 3 screw s Control 26C & 26C T 4 screw s Cont rol 19CS & 19CST 5 screw s Step 6 – Conne ct a Seco ndary Support Line to Seism ic Tab – A tab is provided on the back of each sp eaker for connection to a independent seconda ry support point. Some construction codes require using [...]
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15 Step 8 – Insert the Grille – Consider which direction the logo is facing and press the grille into pla ce until the front of the grille is flush with the rim. Make sure grille is securely sea ted to prevent it from vibrating loose and falling. Removing the Gr ille -- The grille presents a tig ht fit in order to make sure tha t it won’t fal[...]
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16 Safety Agency Compliance Complies with the requirements of UL-2043 Fire Tests for Heat and Visible Smoke Release for Discrete Products and their Accessories Installed in Ai r Handling Spaces, NFPA-70 National Electric Code 1996, Article 300-22(C), and NFPA-90A Installation of Air Conditioning and Ventilation Sy stems, Section 2-3.10.1 (a), Ex ce[...]
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17 Replacement Parts There are no us er serviceabl e parts insi de these speake rs. The foll owing replacem ent parts are for r eference onl y . Refer servici ng to an authoriz ed JB L Service Center. Fo r the name of an authorized Service Cent er in your area, contact JB L Professional at the address listed below. Control 24C Control 24CT Control [...]
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18 JBL Profession al 8500 Balboa Blv d, P.O. Box 2200 Northridge, CA 91329 U.S.A. C EIL ING SPKR MANUA L Rev D A H a r m a n International C o m p a n y[...]