Sony CDX-A250 Installation guide

Sony CDX-A250 Installation guide
2-650-617-41 (1)
*1
A
*1 RCA pin cord (not supplied)
*2 AUDIO OUT can be switched to SUB
or REAR. For details, see the supplied
Operating Instructions.
AUDIO OUT REAR*2
FM/AM
Compact Disc Player
L
R
from car aerial
AUDIO
OUT
REAR
Fuse (10 A)
Installation/Connections
B
Blue/white striped
3

AMP REM
Max. supply current 0.3 A
White
Black
Left
1
White/black striped
Grey
Blue
ANT REM
Right
Max. supply current 0.1 A
Grey/black striped
Green
Red
Left
4
Green/black striped
Purple
CDX-A250
Purple/black striped
© 2005 Sony Corporation Printed in Thailand
Cautions


• This unit is designed for negative earth 12 V DC
operation only.
• Do not get the leads under a screw, or caught in moving
parts (e.g. seat railing).
• Before making connections, turn the car ignition off to
avoid short circuits.
• Connect the yellow and red power input leads only
after all other leads have been connected.
• Run all earth leads to a common earth point.
• Be sure to insulate any loose unconnected leads with
electrical tape for safety.

×2



Connection example
Notes on the power supply lead (yellow)
• When connecting this unit in combination with other
stereo components, the connected car circuit’s rating
must be higher than the sum of each component’s fuse.
• When no car circuits are rated high enough, connect
the unit directly to the battery.

Equipment used in illustrations (not supplied)
• The numbers in the list are keyed to those in the
instructions.
• The bracket  and the protection collar  are
attached to the unit before shipping. Before mounting
the unit, use the release keys  to remove the bracket
 and the protection collar  from the unit. For
details, see “Removing the protection collar and the
bracket ()” on the reverse side of the sheet.
• Keep the release keys  for future use as they
are also necessary if you remove the unit from
your car.
Caution
Handle the bracket  carefully to avoid injuring your
fingers.
Power amplifier
Catch
Note
Before installing, make sure that the catches on both sides of
the bracket  are bent inwards 2 mm. If the catches are straight
or bent outwards, the unit will not be installed securely and may
spring out.
Rear speaker
Active subwoofer
 To a metal surface of the car
First connect the black earth lead, then connect the yellow
and red power input leads.
 To the power aerial control lead or power
supply lead of aerial booster amplifier
Notes
• It is not necessary to connect this lead if there is no power
aerial or aerial booster, or with a manually-operated
telescopic aerial.
• When your car has a built-in FM/AM aerial in the rear/side
glass, see “Notes on the control and power supply leads.”
This connection is only for amplifiers. Connecting any other
system may damage the unit.

Front speaker
Connection diagram
 To AMP REMOTE IN of an optional power
amplifier
Parts Iist
×4
Notes (-B)
• Be sure to connect the earth lead before connecting the
amplifier.
• The alarm will only sound if the built-in amplifier is used.
 To the +12 V power terminal which is
energized in the accessory position of the
ignition key switch
Notes
• If there is no accessory position, connect to the +12 V
power (battery) terminal which is energized at all times.
Be sure to connect the black earth lead to a metal surface
of the car first.
• When your car has a built-in FM/AM aerial in the rear/side
glass, see “Notes on the control and power supply leads.”
 To the +12 V power terminal which is
energized at all times
Be sure to connect the black earth lead to a metal surface
of the car first.
Notes on the control and power supply leads
• The power aerial control lead (blue) supplies +12 V DC when
you turn on the tuner.
• When your car has built-in FM/AM aerial in the rear/side glass,
connect the power aerial control lead (blue) or the accessory
power input lead (red) to the power terminal of the existing
aerial booster. For details, consult your dealer.
• A power aerial without a 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
switch 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 earth 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 leads
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 leads to each other.
Note on connection
If speaker and amplifier are not connected correctly, “FAILURE”
appears in the display. In this case, make sure the speaker and
amplifier are connected correctly.
Yellow
5
Right
* AUDIO OUT SUB/REAR
2
1
Precautions
2


• Choose the installation location carefully so that the
unit will not interfere with normal driving operations.
• Avoid installing the unit in areas subject to dust, dirt,
excessive vibration, or high temperatures, such as in
direct sunlight or near heater ducts.
• Use only the supplied mounting hardware for a safe
and secure installation.
Face the hook inwards.
Adjust the mounting angle to less than 45°.

Orient the release key
correctly.



Removing the protection collar
and the bracket
Before installing the unit, remove the protection
collar  and the bracket  from the unit.
1 Remove the protection collar .
2
1
2
3
Fire wall
Remove the bracket .
 Insert both release keys  together between
the unit and the bracket  until they click.
 Pull down the bracket , then pull up the unit
to separate.
Installation in the dashboard

Notes
• Bend these claws outward for a tight fit, if necessary (-2).
• Make sure that the 4 catches on the protection collar  are
properly engaged in the slots of the unit (-3).

182
 Engage the release keys  together with the
protection collar .
 Pull out the release keys  to remove the
protection collar .
Mounting example
Dashboard
mm

Mounting the unit in a Japanese
car
53 m
You may not be able to install this unit in some makes of
Japanese cars. In such a case, consult your Sony dealer.
m
Note
To prevent malfunction, install only with the supplied screws .


Claws
A TOYOTA
B NISSAN


max. size
5 × 8 mm
to dashboard/centre console
to dashboard/centre console

Bracket
max. size
5 × 8 mm

Bracket
Bracket
max. size
5 × 8 mm
Bracket
Existing parts supplied with your car
Existing parts supplied with your car
A
Before installing the unit, detach the front panel.
-A To detach
Before detaching the front panel, be sure to press .
Press , and pull it off towards you.
Mounting angle adjustment

max. size
5 × 8 mm
How to detach and attach the
front panel
B
-B To attach
Engage part  of the front panel with part  of the unit,
as illustrated, and push the left side into position until it
clicks.
Warning if your car’s ignition
has no ACC position
After turning the ignition off, be sure to press
and hold  on the unit until the display
disappears.
Otherwise, the display does not turn off and this causes
battery drain.
RESET button
When the installation and connections are completed, be
sure to press the RESET button with a ballpoint pen, etc.,
after detaching the front panel.
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