User manual TECHNICS SU-V500 service manual

[. . . ] (Use a power wiring cord with a diameter of 8 mm² (AWG 8) or greater. ) · When more than one power amplifier are going to be used, use a power supply wiring wire and protective fuse of greater current-handling capacity than the total maximum current drawn by each amplifier. 2CAUTION To prevent damage to the machine, take the following precautions: · Be sure the unit is connected to a 12V DC power supply with a negative ground connection. · Do not open the bottom covers of the unit. · Do not install the unit in a spot exposed to direct sunlight or excessive heat or humidity. Also avoid places with too much dust or the possibility of water splashing. [. . . ] Use of speakers having input power ratings that are less than the output power of the amplifier will cause smoke to be emitted as well as damage. · Use speakers that have an impedance of 2 or greater. When more than one set of speakers are going to be used, calculate the combined impedance of the speakers and then connect suitable speakers to the amplifier. 4 4 8 2 4 4 NOTE · If you experience problems during installation, consult your Kenwood dealer. · If the unit does not seem to be working right, consult your Kenwood dealer. Combined impedance Cleaning the unit If the front panel gets dirty, turn off the power and wipe the panel with a dry silicon cloth or soft cloth. 2CAUTION Do not wipe the panel with a hard cloth or a cloth dampened by volatile solvents such as paint thinner and alcohol. They can scratch the surface of the panel and/or cause the indicator letters to peel off. To prevent battery from running out When the unit is used in the ACC ON position without turning the engine ON, it depletes the battery. Use it after starting the engine. 2 English Installation 280 mm 242 mm Ø4. 6 Accessories Part name Self-tapping screws (ø4 × 16 mm) Terminal cover (Power terminal) Speaker level input cable Hexagon wrench 212. 5 mm 238 mm External View Number of Items 4 1 1 1 Installation procedure Since there are large variety of settings and connections possible according to applications, read the instruction manual well to select the proper setting and connection. Remove the ignition key and disconnect the negative - terminal of the battery to prevent short circuits. Set the unit according to the intended usage. Connect the input and output wires of the units. Connect the power wire, power control wire and grounding wire following this order. Install the installation fittings in the unit. · Check that no unconnected wires or connectors are touching the car body. Do not remove caps from unconnected wires or connectors to prevent short circuits. · Connect the speaker wires to appropriate speaker connectors separately. Sharing the negative wire of the speaker or grounding speaker wires to the metal body of the car can cause this unit to fail. NOTE · Speaker level input connections Cable Color of the connector 9 White Left · White/Black 9 Gray Right · Gray/Black Genuine-accessory car stereo (No line output center unit etc. ) 40 Right input LINE OUT terminal · Do not connect cables and leads to both RCA cable input jacks and the speaker level input terminals simultaneously, for this may cause malfunction or damage. 40 Speaker level input connections · The genuine-accessory car stereo shall have a maximum power output of no more than 40 W. · The power is turned on and off as the unit detects input signal (Signal Sensing Turn-ON). There fore it is not necessary to connect the power control wire. Power wire and Speaker wire connection Power control wire* (RCA cable connection) Speaker output terminals · As this unit accepts speakers with a minimum impedance of 2 ohms, connect speakers with 2ohms or higher impedance to these terminals. 40 LINE OUT terminal · The signal that's input from the line input terminal is output. Lead terminal* Fuse 40 A × 1 Terminal cover Subwoofer (L + R) (2) Battery wire* When two subwoofers are connected. (4) Protective Fuse* · Dual voice coil subwoofer (4 + 4) (2 + 2) Battery Ground wire* 4 English Controls 40W ­ 15W Troubleshooting Guide What might appear to be a malfunction in your unit may just be the result of slight misoperation or miswiring. Before calling service, first check the following table for possible problems. (Blown fuse. ) Input (or output) cables are disconnected. Check connections by referring to <Protection function>. [. . . ] The input sensitivity adjusting control is not set to the correct position. Adjust the control correctly referring to <Controls>. (The sound is distorted. ) The speakers wire are connected with wrong 9 / · polarity. Connect them properly checking the 9 / · of the terminals and wires well. [. . . ]