JVC KD-G744 Guide

1
KD-G744
Installation/Connection Manual
0108DTSMDTJEIN
EN
GET0492-002A
[UI]
© 2008 Victor Company of Japan, Limited
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.
WARNINGS
To prevent short circuits, we recommend that you disconnect the battery’s negative terminal and ma e all
electrical connections before installing the unit.
• Be sure to ground this unit to the car’s chassis again a ter 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 spea ers with a 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 spea ers from being damaged (see page 14 of the
INSTRUCTIONS).
• To prevent short circuits, cover the terminals of the UNUSED leads with insulating tape.
• The heat sin becomes very hot after use. Be careful not to touch it when removing this unit.
PRECAUTIONS on power supply and speaker connections:
• DO NOT connect the speaker leads o the power cord to the car battery; otherwise, the unit
will be seriously damaged.
• BEFORE connecting the spea er leads of the power cord to the spea ers, chec the spea er wiring
in your car.
J
Handles
G
Loc nut (M5)
I
Rubber
cushion
A / B
Hard case/Control
panel
C
Sleeve
E
Power cord
L
Battery
K
Remote controller
Heat sin
H
Mounting bolt (M4 × 5 mm;
M5 × 12.5 mm)
F
Washer (ø5)
Parts list or installation and connection
The following parts are provided for this unit. If any item is missing, consult your JVC car audio
dealer immediately.
D
Trim plate
*1 When you stand the unit, be careful not to damage the fuse on the rear.
*2 Avoid touching the connectors.
*3 Not supplied for this unit.
Insert the two handles, then pull them as illustrated
so that the unit can be removed.
When installing the unit
without using the sleeve
In a Toyota car for example, first remove the
car radio and install the unit in its place.
When using the optional stay
Note : When installing the unit on the
mounting brac et, ma e sure to
use the 8 mm-long screws. If longer
screws are used, they could damage
the unit.
Brac et*3
Flat head screws (M5 × 8 mm) *3
Brac et *3
INSTALLATION (IN-DASH MOUNTING)
The following illustration shows a typical installation. If you have any questions or require information
regarding installation its, consult your JVC car audio dealer or a company supplying its.
• If you are not sure how to install this unit correctly, have it installed by a qualified technician.
Removing the unit
Before removing the unit, release the rear section.
Do the required electrical connections.
Bend the appropriate tabs to
hold the sleeve firmly in place.
Poc et
Flat head screws
(M5 × 8 mm) *3
TROUBLESHOOTING
• The use blows.
* Are the red and blac leads connected correctly?
• Power cannot be turned on.
* Is the yellow lead connected?
• No sound rom the speakers.
* Is the spea er output lead short-circuited?
• Sound is distorted.
* Is the spea er output lead grounded?
* Are the “–” terminals of L and R spea ers grounded in common?
• Noise inter ere with sounds.
* Is the rear ground terminal connected to the car’s chassis using shorter and thic er cords?
• This unit becomes hot.
* Is the spea er output lead grounded?
* Are the “–” terminals of L and R spea ers grounded in common?
• This unit does not work at all.
* Have you reset your unit?
Screw (option)
Stay (option)
Fire wall
Dashboard
Install the unit at an
angle of less than 30˚.
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2
A
Typical connections
ELECTRICAL CONNECTIONS
Line out (see diagram ) Rear ground terminal
15 A fuse
Blac
Blue with white stripe
Red
Yellow *2
To the metallic body or chassis of the car
Ignition switch
Fuse bloc
To an accessory terminal in the fuse bloc
To the remote lead of other equipment or automatic antenna if any (200 mA max.)
To a live terminal in the fuse bloc connecting to the car battery
(bypassing the ignition switch) (constant 12 V)
Antenna terminal
Be ore connecting: Chec 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 chec ing the operation of this unit prior to installation, this lead must be connected, otherwise the power
cannot be turned on.
Connecting the external ampli iers and/or subwoo er
B
You can connect amplifiers to upgrade your car stereo system.
• Connect the remote lead (blue with white stripe) to the remote lead of the other equipment so that it can be controlled through this unit.
• Disconnect the speakers rom this unit, connect them to the ampli ier. Leave the speaker leads o this unit unused.
or
PurplePurple with blac stripeGreenGreen with blac stripeGrayGray with blac stripe
WhiteWhite with blac stripe
Right spea er (rear)Left spea er (rear)Right spea er (front)Left spea er (front)
Y-connector (not supplied for this unit)
Subwoofer Rear spea ers
JVC Amplifier
JVC Amplifier
Set “L/O MODE” to “SUB.W” (See
page 1 of the INSTRUCTIONS.)
Set “L/O MODE” to “REAR” (See
page 1 of the INSTRUCTIONS.)
Front spea ers
Remote lead (blue with white stripe)
To the remote lead of other
equipment or automatic
antenna if any
*3 Remote lead
*4 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.
*5 Signal cord (not supplied for this unit)
Front spea ers
JVC Amplifier
To cellular phone system
Brown
To car light control switch
Orange with white stripe
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