Electrical Connections; Troubleshooting - JVC KD-S12 Instructions Manual

ELECTRICAL CONNECTIONS

Make sure to disconnect the battery's negative terminal.
• Be sure to ground this unit to the car's chassis again after installation.
Note:
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
page 13 of the INSTRUCTIONS).
A
Typical Connections
Before connecting: The leads of the power cord and those of the connector from the car body may be different in color.
Line out
Rear ground
terminal
Antenna terminal
Connect only the front speakers if your speaker
system is two-speaker system.
White with black stripe
Front speaker (left)
White
Gray with black stripe
Front speaker (right)
Gray
Green with black stripe
Green
Rear speaker (left)
Purple with black stripe
Purple
Rear speaker (right)
PRECAUTIONS on power supply and speaker connections:

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?
• 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?
B
Connecting the external amplifier
Signal cord (not supplied)
15 A fuse
Blue with white stripe
To the remote lead of other equipment or
automatic antenna if any (200 mA max.)
Black
3
Yellow *
Red
Rear speakers
JVC Amplifier
To metallic body or chassis of the car
To a live terminal in the fuse block connecting to the car battery
(bypassing the ignition switch) (constant 12 V)
To an accessory terminal in the fuse block
2
High
* 1
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.
Remote lead Y-connector (not supplied for this unit)
Fuse block
* 2 Not included for this unit
3
* Before checking the operation of this unit prior to
installation, this lead must be connected, otherwise power
cannot be turned on.
Heat sink
Ignition switch