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The Standby indicator will also light whenever there is a fault that triggers the protection circuitry.
This may indicate one of the following conditions: DC present at the amplifier's input, a speaker
impedance overload, a short circuited speaker line, or possible internal fault. If this indicator remains
lit, remove power to the amplifier and check all connections. During this time, the protection circuits
should automatically reset. If the Standby indicator stays lit after you reapply power, contact your
Parasound Dealer, Installer or Parasound Technical Service for further advice.
Current Overload LEDs
These indicators let you know if you are exceeding the amplifier's power supply capacity. During
normal operation, the bi-color operation indicators for channels 1-5 will be green and the Current
Overload indicator will remain off. If any channel is driven beyond its maximum current capacity or
the impedance for that channel is too low, the Current Overload indicator will light and affected
channel's indicator will change from green to red.
High Temp Indicator
This indicator will light when any of the external heatsinks reach 90 degrees centigrade. If the High
Temp indicator lights, it probably means that the amplifier has inadequate ventilation. Refer to page
4 for more information about proper ventilation. Once the heatsinks cool below 90 degrees, the
amplifier will automatically reset.
Maintaining Your Parasound Amplifier
Your Parasound power amplifier requires no periodic maintenance and has no user serviceable parts
inside. To avoid the risk of electric shock, do not remove the top cover. The amplifier's exterior can
easily be cleaned with a soft cloth moistened only with a few drops of water or glass cleaner.
Main Power Fuse
There is an external fuse located within the AC receptacle that may blow as a result of an internal
fault condition. This fuse protects the unit from possible damage to internal parts. Never replace this
fuse with a fuse of higher value than installed from the factory. Substitution of a larger fuse may
create serious stress and damage to internal parts and will void your warranty.
In Case of Trouble
If you suspect a problem with your amplifier, first turn the amp off and check all your connections.
The trouble may be caused by another component or even a defective hookup cable. If you are
hearing hum out of any of your speakers, turn off the amplifier and disconnect the inputs to it. If the
hum goes away, it was probably be caused by your processor or one of the source components
connected to it. Frequently hum in home theater systems is caused by a grounding problem with the
cable TV system. Contact your cable provider if necessary to make sure the cable feed into your
house is properly grounded. There are cable isolation devices available such as the Video Link #634
or the Mondial Magic specifically designed to cure this problem. In rack mounted systems, ground
loops and hum can sometimes develop via the metal rack rails of the equipment rack. This problem
can be solved with nylon shoulder washers available from Middle Atlantic Products (refer to rack
mounting section of this manual).
