XAV-7W - Sony Car Audio Service Manual (repair manual). Page 7

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For details, see the section “3 Car Systems Connections” (page 14 - 15). Be sure to refer also to the
documentation for all other components in the system.

Notes
• Be sure to connect the ground cord before connecting the amplifier.
• If you connect an optional power amplifier and do not use the built-in amplifier, the beep sound will be deactivated.

Items except the main unit and the connection box are optionally available.

Tip
For connecting two or more CD/MD changers, the source selector XA-C30 (optional) is necessary.

Attach and fix the tap securely as illustrated.

Be sure to connect the parking cord (Light green) to the parking
brake switch cord. The mounting position of the parking brake
switch cord depends on your car. Refer to the system connection
diagram below and consult your car dealer or your nearest Sony
dealer for further details.

Tap 5

For details, see the section “3 Car Systems Connections” (next page).

Notes
• Be sure to connect the power input

cord after all other cords have been
connected.

• If the parking brake switch cord is too

thin, connect the parking cord to the
parking brake switch cord directly
without using the tap.

Tap 5

3

Also see “Connecting Information” on page 13.
• Components listed here except for supplied accessories are available separately. When connecting such

components, be sure to also refer to their documentation.
For specifications and other information on separately available components, contact your dealer.

Prevention of accidents caused by short-circuits
To prevent the risk of accidents caused by short-circuits, connect the power supply leads (red and yellow)
only after all other wiring has been completed, and only with the ignition key in the OFF position.
Otherwise, accidental short-circuiting can lead to electric shock and to serious damage.

When a fuse has blown, check the wiring and locate the cause of the problem before replacing the fuse.
When replacing the fuse, be sure to use only a fuse of the same rating (ampere rating). Using a different
fuse or bridging the contacts with wire is highly dangerous and can lead to serious damage.

Make sure to connect all of the following leads.
Otherwise there is a risk of electric shock, damage to the equipment, or malfunction.
• Connect light green lead to parking brake switch lead of car.
• Connect yellow lead to battery power supply of car.
• Connect red lead to accessory power supply of car.
• Connect black lead to metal point on car chassis.
* Do not to mix up the yellow and red leads, as this will cause the memory contents to be lost.

Observe the following precautions.
Otherwise there is a risk of electric shock, damage to the equipment, or malfunction.
• Cover unused connectors with electrician’s tape to prevent accidental contact.
• Route FM/AM antenna cable, bus cable, RCA interconnects, and power supply leads as far apart from

each other as possible, to prevent noise interference.

• Always grasp the connector and do not pull the cable when disconnecting the bus cable or other cables.

Otherwise the cable may become detached.

Note
Install the TV antennas away from the FM/AM antenna.

Notes on the control and power supply leads
• The power antenna control lead (blue) supplies +12 V DC when turn on the tuner.
• When your car has built-in FM/AM antenna in the rear/side glass, connect the power antenna control

lead (blue) or the accessory power input lead (red) to the power terminal of the existing antenna
booster. For details, consult your dealer.

• A power antenna without relay box cannot be used with this unit.

Memory hold connection
When the yellow power input lead is connected, power will always be supplied to the memory circuit
even when the ignition key is turned off.

Notes on speaker connection
• Before connecting the speakers, turn the unit off.
• Use speakers with an impedance of 4 to 8 ohms, and with adequate power handling capacities to avoid

its damage.

• Do not connect the speaker terminals to the car chassis, or connect the terminals of the right speakers

with those of the left speaker.

• Do not connect the ground lead of this unit to the negative (–) terminal of the speaker.
• Do not attempt to connect the speakers in parallel.
• Connect only passive speakers. Connecting active speakers (with built-in amplifiers) to the speaker

terminals may damage the unit.

• To avoid a malfunction, do not use the built-in speaker wires installed in your car if the unit shares a

common negative (–) lead for the right and left speakers.

• Do not connect the unit’s speaker cords to each other.