User manual KENWOOD KAC-648S

[. . . ] If the Power indicator does not light when the power is turned on, the protection function may be activated. Check whether there is any indication of trouble. Power indicator s The protection function activates in the following situations: · When a speaker cable may be short-circuited. · When a speaker output contacts ground. [. . . ] Sharing the negative cable of the speaker or grounding speaker cables to the metal body of the car can cause this unit to fail. · After installation, check that the brake lamps, winkers, and wipers work properly. Installation Self-tapping screw , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Installation board, etc. (thickness : 15 mm or more) · Since the power amplifier has no parts which require operation, it can be installed at a position away from the driver's seat without any hindrances. As generally accepted positions for its installation, places such as inside the trunk, etc. (Optional. ) Length 0. 5m 1m 2m 4m 5m 6m Type RCA cable CA-2SL CA-12SL CA-22SL CA-52SL RCA cable (ø7mm) CA-3WL CA-13WL CA-23WL CA-53WL RCA cable (ø12mm) CA-5W CA-15W CA-25W CA-45W CA-65W 2CAUTION · Do not install the unit under the carpet. Otherwise heat build-up occurs and the unit may be damaged. · Install this unit in a location which allows heat to easily dissipate. Once installed, do not place any object on top of the unit. · The surface temperature of the amplifier will become hot during use. Install the amplifier in a place where people, resins, and other substances that are sensitive to heat will not come into contact with it. · When making a hole under a seat, inside the trunk, or somewhere else in the vehicle, check that there is nothing hazardous on the opposite side such as a gasoline tank, brake pipe, or wiring harness, and be careful not to cause scratches or other damage. 2CAUTION · If you wish to bridge-connect a speaker, the speaker impedance must be no less than 4 ohms. Connecting a speaker with an impedance lower than 4 ohms may damage the unit. · Be sure to connect capacitors to speakers to which high frequencies will be passed. Failure to do so will result in a drop of the combined impedance with the subwoofer. · Ensure that the withstand voltage and current ratings of the capacitors (C) and coils (L) are sufficient. Coil (L): Passes low frequencies and blocks high frequencies. (Low pass) Capacitor (C): Passes high frequencies and blocks low frequencies. (High pass) 159000 C= (µF) fc=Cut of Frequency (Hz) fc x R R=Speaker Impedance () 159 x R L= (mH) fc 6 Connection s Power cable connection 2WARNING To prevent fire caused by a short in the wiring, connect a fusible link or breaker nearby the battery's positive terminal. FUSE(25A) BATT POWER IN SPEAKER OUTPUT BRIDGED GND 25 LEFT RIGHT SPEAKER LEVEL INPUT LEFT RIGHT A SPEAKER LEVEL INPUT A B B L R A P. CON(REMOTE) B Round terminal (Small) Round terminal (Medium) Power terminal Terminal cover Battery cable Power control cable CENTER UNIT Ground cable Round terminal (Large) Protective Fuse Battery Power terminal Connect to their respective terminals the power control cable, power supply cable, and ground cable, all of which pass through the associated terminal cover. Once the connections are complete, place the cover on the terminal section. Wiring · If a buzzing noise is heard from the speakers when the engine is running, connect a line noise filter (optional) to each of the battery cable. · Do not allow the cord to directly contact the edge of the iron plate by using Grommets. · Connect the ground cable to a metal part of the car chassis that acts as an electrical ground passing electricity to the battery`s negative - terminal. [. . . ] Before calling service, first check the following table for possible problems. PROBLEM No sound. (No sound from one side. ) POSSIBLE CAUSE SOLUTION · Input (or output) cables are · Connect the input (or output) disconnected. · Protection circuit may be · Check connections by referring activated. · The fuse may be blown because · Replace the fuse with a new the volume was too high. [. . . ]