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A good user manual
The rules should oblige the seller to give the purchaser an operating instrucion of JL Audio J21000.1, 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 JL Audio J21000.1 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 JL Audio J21000.1. 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 JL Audio J21000.1 should contain:
- informations concerning technical data of JL Audio J21000.1
- name of the manufacturer and a year of construction of the JL Audio J21000.1 item
- rules of operation, control and maintenance of the JL Audio J21000.1 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 JL Audio J21000.1 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 JL Audio J21000.1, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the JL 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 JL Audio J21000.1.
Why one should read the manuals?
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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
Th ank you for p urcha sing a J L Au dio a mplif ier for your autom otive s ound syst em . Y our amplif ie r h as be en d es igne d an d m anufac ture d to ex ac ting stan dard s i n orde r t o en su re yea rs o f mu sic al e njoy ment in your vehicl e. For m ax imum per fo rm ance , we hig hly rec omme nd th at you h ave your ne w amp lif ier ins [...]
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Page 2
2 JL Audio 3 PLANNING Y OUR INST AL L A TION I t is importan t tha t y ou take the tim e t o r ead t hi s ma nua l an d t hat you pl an out you r in st al l ation ca ref u l ly . T he fol low in g a re s ome cons idera tion s t hat you mu st t a ke into acc ount when pla n ni ng you r ins ta l lat ion. Cooling Ef ficienc y Considerati ons: The ou t[...]
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Page 3
4 JL Audio 5 POWER CONNECTIONS Befor e i nstal ling the a mp l if ier , disconnect the nega tive (ground ) wire from the vehicl e’ s battery . This wi ll prev ent accidental damage to the system, t he veh icle a nd you r p ers on du ri ng ins ta l lat ion. Made in China ?[...]
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Page 4
6 JL Audio 7 IMPOR T ANT ! Mak e sur e yo u obse rve corr ect polari ty in makin g th e “H igh-Level I np ut ” co nnect ions. Fa ilur e to do so will res ult in a co mplet e loss of signal (no bass). Th e con nec t ions for t he “H ig h-L eve l I nputs” p lu g w ire s a re a s fol low s f rom le f t to ri ght on t he p lug: W hite : L ef t [...]
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Page 5
8 JL Audio 9 “BASS BOOST” CONTROL Th e J2- 100 0.1 i nclude s a sing le ba nd, boo st- only bass equali zer co ntrolled b y a ro tar y knob ma rked “Ba ss Boo st ” . Thi s co ntrol has a boost range of 0d B ( f ull-counter clockw ise ) to + 12dB (fu l l-clo ck w ise) a nd i s ce ntered at 4 5 H z. LP Filter F requency (Hz) Input Sens. Bass [...]
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Page 6
10 JL Audi o 11 SERVICING Y OUR AMPLIFIER If your amplifier fai ls or malf unct io ns, please return it to yo u r au thorized JL Audio dealer so that it ma y be sent in to JL Audio for ser vice. There are no user serviceable part s o r fuses i nsi de the am plifier . Th e uniqu e natur e o f the cir cuitr y in the JL Audio amp lif iers req uires sp[...]
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Page 7
12 J L Au dio 13 APPEN DIX B : J2- 1000. 1 Specifications General Specificat ions: Recommended F use V alue: 1 00A Recommended F use T ype: ANL at battery, 3x 3 5A A TC fuses on amplifier chass is. Input Section: Low- Leve l Inpu t: Sing le- en ded wi th RC A jack s Low-Level Input Range: 200mV - 6.5 V RMS High-Level Input: Single - ende d with m o[...]
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Page 8
14 JL Audi o 15 “My amp lif ier tu rns on, but the re is n o ou tpu t ” Che ck the inpu t signa l using an A C voltmeter to measure the vol tage from the so urce unit while an appro priate test to ne is pla yed through the source unit ( disconnect the input cables f rom t he ampl i fi er pr ior to t hi s te st). T he f reque ncy us ed sho uld b[...]
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Page 9
16 JL Audi o 17 INST ALLA TION NO TES: Use this diagram to document your amplifier’ s switch and control positions. LP Filter F requenc y (Hz) Input Sens. Bass Boost Remote Level P ort min max 40 300 O +12dB Pr otec tP ower High-Level Inputs LEFT RIGHT LEFT RIGHT Amplifier Co ntrols Amplifier Inputs Pr e- Outs Amplifier Status[...]
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Page 10
18 JL Audi o 19 INST ALLA TION NO TES: INST ALLA TION NO TES:[...]
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Page 11
LIMIT ED WA RR ANTY AMP LIFIERS U SA JL A udio warrants this p ro du ct t o b e fr ee o f def ects in m at erials and w orkmanshi p f or a period of one ( 1 ) year from t he origina l date of purch ase. This wa rranty is not transferrable and ap plies o nly to the origina l p urchaser from an au thorized JL Audio dealer . Should serv ice [...]