User manual JBL S7500-K2

[. . . ] Retain instructions ­ The safety and operating instructions should be retained for future reference. Heed Warnings ­ All warnings on the product and in the operating instructions should be adhered to. Follow Instructions ­ All operating and use instructions should be followed. Water and Moisture ­ The product should not be used near water ­ for example, near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, and the like. [. . . ] Apparatet skai ikke monteres i skap uten ventilasjon, eller direkte over varmeproduserende utstyr, som for eksempel kraftforsterkere. Den maksimale romtemperaturen som står oppgitt i produktbeskrivelsen, skal overholdes. For at apparatet skal være pålitelig i bruk og ikke overopphetes, må disse åpningene ikke blikkeres eller tildekkes. Stikk aldri noe inn i ventilasjonsåpningene, og pass på at det aldri søles noen form for væske på apparatet. Utgangsplugger fra audioforsterkere skai aldri koples direkte til apparatet. Unngå brannfare og elektrisk støt ved å sørge for at apparatet ikke utsettes for regn eller fuktighet og ikke anvendes i næheten an vann. Apparatet skal ikke brukes hvis det har blitt utsatt for støt, er skadet eller blitt vått, eller hvis endringer i ytelsen tyder på at det trenger service. Hvis dekselet fjernes, utsettes man for livsfarlig høyspenning. Komponenten er merket med denne trekanten, som er en advarsel om at det finnes uisolert, farlig spenning inne i kabinettet. . . høy nok til å utgjøre en fare for elektrisk støt. Komponenten er merket med denne trkanten, som betyr at den tilhørende litteraturen inneholder viktige opplysninger om drift og vedikehold. Svenska Viktiga säkerhetsföreskrifter Spara dess föreskrifter för framtida bruk. Märkväl, att andra matningsspänningar eventuellt kräver att en annan typs nätsladd och/eller kontakt anänds. Auto Turn-On and Power Sequencing Circuitry Features The JBL Synthesis S7500-K2 power amplifier features the following: THX Ultra Specifications This amplifier meets or exceeds the stringent specifications set by the Lucasfilm THX Audio division in their specifications for "Ultra"-class certification, including power handling, total harmonic distortion, frequency response, signal to noise ratio, slew rate, and crosstalk. When incorporated into a complete THX system, you will hear in your home what the director and sound engineer heard in the recording studio. Full Seven Channel Operation The S7500-K2 has been designed to integrate well into the world of multi-channel audio. It is one of the first amplifiers designed to reproduce the latest development in home theater audio; rear channels, in addition to side channels, to produce a truly enveloping sound field. When coupled with a high quality subwoofer amplifier, such as the Synthesis S800, it is a solid foundation on which to build a high-performance home cinema system that will astound the listener with its power and realism. ® 8 2. 0 INTRODUCTION AND FEATURES Quiet Cooling The S7500-K2 utilizes a fan to cool the amplifier channels, ensuring long-term reliability. To reduce fan noise to an absolute minimum, a thermal sensing and control circuit has been incorporated in the Synthesis S7500-K2 that senses increases in temperature within the amplifier and powers a fan at a speed proportional to that temperature increase. When the S7500-K2 is "loafing", the fan turns very slowly ­ and quietly. At high listening levels (and the higher operating temperatures this creates within any amplifier), the sensing circuitry causes the fan to turn faster, producing increased cooling. As a result, the fan is never turning faster than necessary, and most of the noise that is generated is masked by the program being listened to. Comprehensive and Isolated Circuit Protection The S7500-K2 amplifier employs a sophisticated protective circuit (one for each channel) that senses many possible 2. 0 fault conditions, such as shorted loudspeaker wires or excess power demand, and turns the affected channel(s) and their blue front panel indicators off until the fault condition is removed, at which time normal operation is automatically restored. While protection of this sort is not uncommon in today's well-designed amplifiers, a remarkable feature of the Synthesis S7500-K2's protective circuits is that they are optically-coupled to the signal circuit; there is no direct electrical connection between the signal path and the protective circuitry. [. . . ] Make sure that each amplifier has its Auto On/Manual On switch in the Auto On position. Problem: Insufficient audio from the speakers. Check that the output levels of the surround processor or equalizer are set properly. Verify that the speakers have been wired to the amplifier with the correct polarity. Make sure that the screw terminal and DIN adapter cables to speakers are correctly wired and are connected to the correct jacks on the S7500-K2. [. . . ]