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4 – EN
INSTALLATION / CONNECTION
In dash-mounting
Do the required electrical
connections.
Bend the appropriate tabs
to hold the sleeve firmly
in place.
When you stand the unit, be careful not
to damage the fuse on the rear.
Removing the unit
Before removing the unit, release the rear section.
When using the optional stay
Install the unit at an angle of less
than 30˚.
Screw (option)
Stay (option)
Fire wall
Dashboard
When installing the unit without using the sleeve
Flat type screws
—M5 × 8 mm *
Pocket
Flat type screws—M5 × 8 mm *
Bracket*
Bracket*
* Not supplied for this unit.
In a Toyota car for example, first remove the car radio and install the unit in its place.
TROUBLESHOOTING
• The fuse blows.
* Are the red and black leads connected correctly?
• Power cannot be turned on.
* Is the yellow lead connected?
• No sound from the speakers.
* Is the speaker output lead short-circuited?
• Sound is distorted.
* Is the speaker output lead grounded?
* Are the “–” terminals of L and R speakers grounded in common?
• Noise interfere with sounds.
* Is the rear ground terminal connected to the car’s chassis using shorter and
thicker cords?
• This unit becomes hot.
* Is the speaker output lead grounded?
* Are the “–” terminals of L and R speakers grounded in common?
• This unit does not work at all.
* Have you reset your unit?
Å Control panel ..........................................................................................1
ı Hard case (for KD-R304) ..........................................................................1
Ç Sleeve .....................................................................................................1
Î Trim plate ...............................................................................................1
ELECTRICAL CONNECTIONS
Purple
Front speaker
(left)
To the automatic antenna if any
(250 mA max.)
Blue
Red
To an accessory terminal
in the fuse block
To a live terminal in the
fuse block connecting
to the car battery
(bypassing the ignition
switch) (constant 12 V)
Yellow
*
2
To the metallic body
or chassis of the car
Black
Ignition switch
15 A fuse
Fuse block
Rear speaker
(left)
Rear speaker
(right)
Front speaker
(right)
White with black stripe
Rear ground terminal
Antenna
terminal
Gray with black stripe
Green
Gray
Green with black stripe
Purple with black stripe
White
Typical connections
Use the front speaker lead if your speaker
system is two-speaker system.
Rear line out
Before connecting: Check the wiring in the vehicle carefully. Incorrect connection may cause serious damage to this
unit. The leads of the power cord and those of the connector from the car body may be different in color.
1 Connect the colored leads of the power cord in the order specified in the illustration below.
2 Connect the antenna cord.
3 Finally connect the wiring harness to the unit.
*
1
Not supplied for this unit.
*
2
Before checking the operation of this unit prior to installation, this lead must be connected, otherwise the power cannot
be turned on.
*
3
Firmly attach the ground wire to the metallic body or to the chassis of the car—to the place uncoated with paint (if
coated with paint, remove the paint before attaching the wire). Failure to do so may cause damage to the unit.
Rear
speakers
Remote lead
Remote lead (blue with white stripe)
To the remote lead of
other equipment or
automatic antenna
if any
Y-connector
*
1
JVC Amplifier
Connecting the external amplifier
Front speakers
Signal cord
*
1
PRECAUTIONS on power supply and speaker connections
PREPARATION
This unit is designed to operate on 12 V DC, NEGATIVE ground electrical
systems. If your vehicle does not have this system, a voltage inverter is required,
which can be purchased at JVC car audio dealers.
INSTALLATION
The following illustration shows a typical installation. If you have any questions or require information regarding installation
kits, consult your JVC car audio dealer or a company supplying kits.
• If you are not sure how to install this unit correctly, have it installed by a qualified technician.
Parts list for installation and connection
È Rubber cushion .......................................................................................1
Ô Handles ................................................................................................... 2
Remote controller (for KD-R304) .............................................................1
Ò Battery (for KD-R304) ..............................................................................1
‰ Power cord ..............................................................................................1
Ï Washer (ø5) ............................................................................................1
Ì Lock nut (M5) ..........................................................................................1
Ó Mounting bolt—M4 x 5 mm; M5 x 12.5 mm ..........................................1
To the remote lead of other equipment
(200 mA max.)
Blue with white
stripe
For KD-R304
WARNINGS
To prevent short circuits, we recommend that you disconnect the battery’s
negative terminal and make all electrical connections before installing the unit.
• Be sure to ground this unit to the car’s chassis again after installation.
Notes:
• Replace the fuse with one of the specified rating. If the fuse blows frequently,
consult your JVC car audio dealer.
• It is recommended to connect to the speakers with maximum power of more
than 50 W (both at the rear and at the front, with an impedance of 4 Ω to 8 Ω).
If the maximum power is less than 50 W, change “AMP GAIN” setting to
prevent the speakers from being damaged (see
“Menu operations”).
• To prevent short-circuit, cover the terminals of
the UNUSED leads with insulating tape.
• The heat sink becomes very hot after use. Be
careful not to touch it when removing this unit.
Heat sink
EN_KD-R304_R204[UI]_f.indd 4EN_KD-R304_R204[UI]_f.indd 4 3/9/08 9:36:52 AM3/9/08 9:36:52 AM