Fuse Replacement; Troubleshooting Guide - Sony XM-752EQX Operating Instructions Manual

Precaution
• This unit is designed for negative ground 12V
DC operation only.
• Use speakers with an impedance of 2 to 8 ohms
(4 to 8 ohms 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.
• Avoid installing the unit in areas subject to:
-- high temperatures such as from direct sunlight
or hot air from the heater
-- rain or moisture
-- 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.
• When installing the unit horizontally, be sure not
to cover the fins with the floor carpet etc.
• 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 cormectioes.
• This power amplifier employs a protection
circuit* to protect the transistors and speakers ff
the amplifier malfunctions. Do not attempt to test
the protection circuit 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.
• For safety reasons, keep your car audio volume
moderate so that you can stiff 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 ¢dt*uit
This amplil_er is provided with a protection circuit that
operates in the following cases:
-- when the unit is overheated
-- when a DC current is genemted
-- 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 be[o_ using again.
If you have any questions or problems concerning
your unit that are not covered in this manual,
please consult your nearest Sony dealer.
Troubleshooting Guide
The following
checklist will assist in the correction of most problems which you may encounter with your
unit.
Before going through the checklist below, refer to the connection and operating procedures.
Problem Cause/Solution
The POWER/PROTECTOR The fuse is blown. --+ Replace the fuse with a new one.
indicator does not light up. The ground lead is not secucely connected. ---+Fasten the ground lead
securely to a metal surface of the car.
t2