Read Sony XM-ZR704 Service Manual online
XM-ZR704
3
SECTION 1
GENERAL
This section is extracted
from instruction manual.
from instruction manual.
Location and Function of Controls
POWER/PROTECTOR indicator
Lights up in green during operation.
When the PROTECTOR is activated the indicator
will change from green to red.
When the PROTECTOR is activated refer to the
Troubleshooting Guide.
When the PROTECTOR is activated the indicator
will change from green to red.
When the PROTECTOR is activated refer to the
Troubleshooting Guide.
SUBSONIC FILTER cut-off frequency
adjustment control
Set the cut-off frequency (6 - 70 Hz) for the
subsonic filter.
Set the cut-off frequency (6 - 70 Hz) for the
subsonic filter.
LEVEL adjustment control
The input level can be adjusted with this control.
Turn it in the clockwise direction when the output
level of the car audio unit seems low.
Turn it in the clockwise direction when the output
level of the car audio unit seems low.
Cut-off frequency adjustment control
Set the cut-off frequency (50 - 300 Hz) for the low-
pass or high-pass filter.
pass or high-pass filter.
FILTER selector switch
When the switch is in the LP position,the filter is set
to low-pass. When the switch is in the HP position,
the filter is set to high-pass.
to low-pass. When the switch is in the HP position,
the filter is set to high-pass.
LOW BOOST level control
Turn this control to boost the frequencies around
40 Hz to a maximum of 10 dB.
40 Hz to a maximum of 10 dB.
Precautions
[
This unit is designed for negative ground 12 V DC
operation only.
operation only.
[
Use speakers with an impedance of 2 to 8 Ω
(4 to 8 Ω when used as a bridging amplifier).
(4 to 8 Ω when used as a bridging amplifier).
[
Do not connect any active speakers (with built-in
amplifiers) to the speaker terminals of the unit.
Doing so may damage the active speakers.
amplifiers) to the speaker terminals of the unit.
Doing so may damage the active speakers.
[
Avoid installing the unit in areas subject to:
— high temperatures such as from direct sunlight
— high temperatures such as from direct sunlight
or hot air from the heater
— rain or moisture
— dust or dirt.
— dust or dirt.
[
If your car is parked in direct sunlight and there is a
considerable rise in temperature inside the car,
allow the unit to cool down before use.
considerable rise in temperature inside the car,
allow the unit to cool down before use.
[
When installing the unit horizontally, be sure not to
cover the fins with the floor carpet etc.
cover the fins with the floor carpet etc.
[
If this unit is placed too close to the car audio unit
or antenna, interference may occur. In this case,
relocate the amplifier away from the car audio unit
or antenna.
or antenna, interference may occur. In this case,
relocate the amplifier away from the car audio unit
or antenna.
[
If no power is being supplied to the car audio unit,
check the connections.
check the connections.
[
This power amplifier employs a protection circuit*
to protect the transistors and speakers if the
amplifier malfunctions. Do not attempt to test the
protection circuits by covering the heat sink or
connecting improper loads.
to protect the transistors and speakers if the
amplifier malfunctions. Do not attempt to test the
protection circuits by covering the heat sink or
connecting improper loads.
[
Do not use the unit on a weak battery as its
optimum performance depends on a good power
supply.
optimum performance depends on a good power
supply.
[
For safety reasons, keep your car audio unit volume
moderate so that you can still hear sounds outside
your car.
moderate so that you can still hear sounds outside
your car.
Fuse Replacement
If the fuse blows, check the power connection and
replace both the fuses. If the fuse blows again after
replacement, there may be an internal malfunction. In
such a case, consult your nearest Sony dealer.
replace both the fuses. If the fuse blows again after
replacement, there may be an internal malfunction. In
such a case, consult your nearest Sony dealer.
Warning
When replacing the fuse, be sure to use one matching
the amperage stated above the fuse holder. Never use
a fuse with an amperage rating exceeding the one
supplied with the unit as this could damage the unit.
the amperage stated above the fuse holder. Never use
a fuse with an amperage rating exceeding the one
supplied with the unit as this could damage the unit.
* Protection circuit
This amplifier is provided with a protection circuit that
operates in the following cases:
— when the unit is overheated
— when a DC current is generated
— when the speaker terminals are short-circuited.
The color of the POWER/PROTECTOR indicator will change
from green to red, and the unit will shut down.
If this happens, turn off the connected equipment, take out
the cassette tape or disc, and determine the cause of the
malfunction. If the amplifier has overheated, wait until the
unit cools down before use.
operates in the following cases:
— when the unit is overheated
— when a DC current is generated
— when the speaker terminals are short-circuited.
The color of the POWER/PROTECTOR indicator will change
from green to red, and the unit will shut down.
If this happens, turn off the connected equipment, take out
the cassette tape or disc, and determine the cause of the
malfunction. If the amplifier has overheated, wait until the
unit cools down before use.
If you have any questions or problems concerning
your unit that are not covered in this manual, please
consult your nearest Sony dealer.
your unit that are not covered in this manual, please
consult your nearest Sony dealer.
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