Fuse Replacement - Sony XM-754HX Operating Instructions Manual

Connections
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Precautions
e This unit is designed for negative ground 12 V DC
operation only.
e Use speakers with suitable impedance.
— HI-CURRENT mode: 1 to 2Q.
— HI-VOLTAGE mode: 2 to 4 Q.
è Do not connect any active speakers (with built-in
amplifiers) to the speaker terminals of the unit.
Doing so may damage the active speakers.
e Avoid installing the unit where:
— it would be subject to high temperatures such as
from direct sunlight or hot air from the heater
— it would be exposed to rain or moisture
— it would be subject to dust or dirt.
e 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.
e When installing the unit horizontally, be sure not to
cover the fins with the floor carpet etc.
e If this unit is placed too close to the car radio,
interference may occur. In this case, relocate the
amplifier away from the car radio.
If no power is being supplied to the cassette player
or tuner, check the connections.
e 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.
Do not use the unit on a weak battery as its
optimum performance depends on a good power
supply.
e For safety reasons, keep your car audio volume
moderate so that you can still hear sounds outside
your car.
Fuse Replacement
If the fuse blows, check the power connection and
replace the fuse. 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.
*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.
If you have any questions or problems concerning
your unit that are not covered in this manual, please
consult your nearest Sony dealer.