JVC KD-S747 Instructions Manual page 24

PRECAUTIONS on power supply and speaker connections:
• DO NOT connect the speaker leads of the power cord to the car battery; otherwise, the unit will be
seriously damaged.
• Connect the black lead (ground), yellow lead (to car battery, constant 12 V), and red lead (to an accessory
terminal) correctly.
• BEFORE connecting the speaker leads of the power cord to the speakers, check the speaker wiring in your
car.
– If the speaker wiring in your car is as illustrated in Fig. 1 and Fig. 2 below, DO NOT connect the unit
using that original speaker wiring. If you do, the unit will be seriously damaged.
Redo the speaker wiring so that you can connect the unit to the speakers as illustrated in Fig. 3.
– If the speaker wiring in your car is as illustrated in Fig. 3, you can connect the unit using the original
speaker wiring in your car.
– If you are not sure of the speaker wiring of your car, consult your car dealer.
+ +
L
-
-
+ +
R
-
-
Fig. 1
Connecting the leads /
Twist the core wires when connecting.
CAUTION / :
• To prevent short-circuit, cover the terminals of the UNUSED leads with insulating tape.
•
Connections Adding Other Equipment /
You can connect an amplifier 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.
• For amplifier only:
– Connect this unit's line-out terminals to the amplifier's line-in terminals.
– Disconnect the speakers from this unit, connect them to the amplifier. Leave the speaker leads of
this unit unused. (Cover the terminals of these unused leads with insulating tape, as illustrated
above.)
Amplifier /
Signal cord (not supplied with this unit)
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?
• Unit becomes hot.
* Is the speaker output lead grounded?
* Are the "–" terminals of L and R speakers grounded in common?
+ +
L
-
-
+ +
R
-
-
Fig. 2
Rear speakers
INPUT
L
L
JVC Amplifier
R R
LINE OUT
L
L L
KD-S747
R R
R
REAR
Front speakers
+ +
L
- -
+
+
R
-
-
Fig. 3
Solder the core wires to connect them securely.
Remote lead
Blue with white stripe
* 2
*2 : Firmly attach the ground wire to the metallic body or to the chassis of the car—to the place not
coated with paint (if coated with paint, remove the paint before attaching the wire). Failure to do
so may cause damage to the unit.
4
Y-connector (not supplied with this unit)
To power aerial if any