Read Sony WX-7700MDX Service Manual online
8
WX-7700MDX
Cautions
• This unit is designed for negative earth 12 V
DC operation only.
• Do not get the wires 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 wires to a common earth
point.
point.
• Be sure to insulate any loose unconnected
wires with electrical tape for safety.
Notes on the power supply cord (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.
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.
Parts Iist (
1
)
The numbers in the list are keyed to those in the
instructions.
instructions.
Connection example (
2
)
Notes (
2
-A)
• Be sure to connect the earth lead 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.
be deactivated.
Tip (
2
-B-
)
For connecting two or more changers, the source
selector XA-C30 (optional) is necessary.
selector XA-C30 (optional) is necessary.
Connection diagram (
3
)
When inserting each connector, be sure to insert
securely, as vibration through driving may
cause a poor connection.
securely, as vibration through driving may
cause a poor connection.
1
To a metal surface of the car
Make sure to connect the black earth lead first of
all, then proceed with connection steps
Make sure to connect the black earth lead first of
all, then proceed with connection steps
2
-
7
.
Check the black earth lead is connected properly,
before connecting the orange/white striped lead,
yellow and red power input leads.
before connecting the orange/white striped lead,
yellow and red power input leads.
2
To AMP REMOTE IN of an optional power
amplifier
This connection is only for amplifiers. Connecting
any other system may damage the unit.
amplifier
This connection is only for amplifiers. Connecting
any other system may damage the unit.
2
B
Source selector
*
XA-C30
BUS CONTROL IN
A
3
To the power aerial control lead or power supply
lead of aerial booster amplifier
Notes
• I t is not necessary to connect this lead if there
Notes
• I t is not necessary to connect this lead if there
is no power aerial or aerial booster, or with a
manually-operated telescopic aerial.
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.”
and power supply leads.”
4
To the interface cable of a car telephone
5
To a car’s illumination signal
Be sure to connect the black earth lead to it first.
Be sure to connect the black earth lead to it first.
6
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
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 it
first.
energized at all times.
Be sure to connect the black earth lead to it
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.”
and power supply leads.”
7
To the +12 V power terminal which is energized
at all times
Be sure to connect the black earth lead to it first.
at all times
Be sure to connect the black earth lead to it first.
Notes on the control and power supply leads
• The power aerial control lead (blue) supplies +12 V
• 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.
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 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.
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,
• 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.
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.
speakers with those of the left speaker.
• Do not connect the earth lead of this unit to the
negative (–) terminal of the speaker.
• D o not attempt to connect the speakers in parallel.
• Connect only passive speakers. Connecting active
• Connect only passive speakers. Connecting active
speakers (with built-in amplifiers) to the speaker
terminals may damage the unit.
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.
a common negative (–) lead for the right and left
speakers.
• Do not connect the unit’s speaker cords to each
other.
SUBWOOFER OUT
(MONO)
*
not supplied
BUS AUDIO IN
BUS CONTROL IN
BUS AUDIO IN
AUDIO OUT
(FRONT)
AUDIO OUT
(REAR)
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