Safety Precautions; Protection Function - Kenwood KAC-648S Instruction Manual

Safety precautions

WARNING
To prevent injury or fire, take the following
precautions:
• When extending the ignition, battery, or
ground wires, make sure to use automotive-
grade wires or other wires with a 3mm
(AWG12) or more to prevent wire
deterioration and damage to the wire coating.
• To prevent a short circuit, never put or leave
any metallic objects (such as 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.
CAUTION
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
c o n n e c t i o n .
• Do not open the top or bottom covers of the
u n i t .
• 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
m a l f u n c t i o n .
• To prevent a short circuit when replacing a
fuse, first disconnect the wiring harness.

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.
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
protection function may be activated. Check whether there is any
indication of trouble.
The protection function activates in the following
situations:
• When a speaker wire may be short-circuited.
• When a speaker output contacts ground.
• When the temperature of internal parts exceeds 120°C (248°F).
• 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 -
t e r m i n a l .
2
English
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.
2
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.
CAUTION
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.
FCC WARNING
This equipment may generate or use radio
frequency energy. Changes or modifications
to this equipment may cause harmful
interference unless the modifications are
expressly approved in the instruction manual.
The user could lose the authority to operate
this equipment if an unauthorized change or
modification is made.
Accessories
Part name
Terminal cover
(Power terminal)
Self-tapping screws
(ø4 16 mm)
External Number of
View Items
1
4
Power indicator