Kenwood KAC-648 User Manual - Page 2

Safety precautions 2WARNING To prevent injury and/or fire, take the following precautions: • When extending the battery or ground cables, make sure to use automotive-grade cables or other cables with an area of 3 mm2 (AWG12) or more to prevent cable deterioration and damage to the cable coating. • To prevent short circuits, never put or leave any metallic objects (e.g., coins or metal tools) inside the unit. • If the unit starts to emit smoke or strange smells, turn off the power immediately and consult your Kenwood dealer. • Do not touch the unit during use because the surface of the unit becomes hot and may cause burns if touched. 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 top or 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. • When replacing a fuse, only use a new one with the prescribed rating. Using a fuse with the wrong rating may cause your unit to malfunction. • To prevent short circuits when replacing a fuse, first disconnect the wiring harness. 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. 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. Accessories Part name External Number of View Items Round terminal (Large) 1 Round terminal (Medium) 2 Round terminal (Small) 1 Terminal cover (Power terminal) 1 Self-tapping screws (ø4 × 16 mm) 4 Protection function 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. s Power indicator: When the power is turned on, the Power indicator lights. If the Power indicator does not light when the power is turned on, the Power indicator protection function may be activated. Check whether there is any indication of trouble. s The protection function activates in the following situations: • When a speaker cable may be short-circuited. • When a speaker output contacts ground. • When the temperature of internal parts exceeds 120°C (248°F). • When a ground cable 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. 2