User manual KENWOOD KAC-644

[. . . ] They can scratch the surface of the panel and/or cause the indicator letters to peel off. To prevent battery rise 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. Protection function There is a Protection function installed in the unit to protect the unit and speakers from various problems. When Protection operates, the indicator informs you of the condition. (Refer to page 5) Accessories Part name Self-tapping screws (ø4 × 16 mm) Terminal cover (Power terminal) Speaker level input cable External View Number of Items 4 1 1 2 English Installation 330 mm 204 mm Ø4. 6 Self-tapping screw (ø4 × 16 mm) 230 mm 244 mm 254 mm Installation board, etc. [. . . ] (Frequencies above 80 Hz are cut. ) The speaker output is automatically turned monaural (L+R) and the bass boost function is activated. 2 INPUT SENSITIVITY control Set this control according to the pre-output level of the center unit connected with this unit, or to the maximum power output of the genuineaccessory car stereo. Use the diagram on the right as a guide. NOTE For the pre-output level or the maximum power output, refer to the <Specifications> in the instruction manual of the center unit. 4 English 3 The protection function is activated in the following situations: This unit is equipped with a protection function for protecting this unit and your speakers from various accidents or problems that can occur. When the protection function is triggered, the Power indicator goes off and the amplifier stops operating. · When a speaker wire may be short-circuited. · When a speaker output contacts ground. · When the unit malfunctions and a DC signal is sent to the speaker output. · When the internal temperature is high and unit won't operate. · When a ground wire of the center unit (cassette receiver, CD receiver, etc. ) or this unit is not connected to a metal part serving as an electrical ground passing electricity to the battery's negative - terminal. English 5 Connection Terminal names 40 4 567 8 9 0 4 Fuse (40 A) 5 Battery terminal 6 Ground terminal 7 Power control terminal Controls the unit ON/OFF. Be sure to connect it with all the systems. 9 LINE IN terminal 0 Speaker level input terminals NOTE · The genuine-accessory car stereo shall have a maximum power output of no more than 40 W. · Do not connect the speaker output leads from a power amplifier (Optional) to the speaker level input terminals of this unit, for this may cause malfunction or damage. · After installation, check that the brake lamps, winkers, and wipers work properly. Wiring · Take the battery wire for this unit directly from the battery. If it's connected to the vehicle's wiring harness, it can cause blown fuses etc. · 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 wire. · Do not allow the wire to directly contact the edge of the iron plate by using Grommets. · Connect the ground wire to a metal part of the car chassis that acts as an electrical ground passing electricity to the battery`s negative - terminal. Do not turn the power on if the ground wire is not connected. · Be sure to install a protective fuse in the power cord near the battery. The protective fuse should be the same capacity as the unit's fuse capacity or somewhat larger. · For the power cord and ground, use a vehicle type (fireproof ) power wring cord with a current capacity greater than the unit's fuse capacity. (Use a power wiring cord with a diameter of 5 mm² (AWG 10) 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. Speaker selection · The rated input power of the speakers that are going to be connected should be greater than the maximum output power (in Watts) of the amplifier. 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. [. . . ] Before calling service, first check the following table for possible problems. PROBLEM POSSIBLE CAUSE SOLUTION · Connect the input (or output) cables. No sound. · Input (or output) cables are (No sound from one side. ) disconnected. (Blown fuse. ) · Protection circuit may be activated. · · The output level is too small (or too large). [. . . ]