Electro-Voice Plasma Series Owner's Manual page 7

Status Indicators
These indicators provide information about the actual operational state of
the Plasma's internal power amplifier.
Signal Indicates that an audio signal is present at the input and that it is
output.
Limit When lit this indicator signals that the internal power amplifier actually
operated at the threshold of clipping. Short-term blinking is not critical,
because the amp's audio limiter keeps distortion under control, so that the
sound is unaffected. Input overdrive, which results in sound degradation, is
a probable cause for a continuously lit indicator. To prevent this from
happening, reduce the input level.
Protection There are two leds to indicate Speaker Protection, or Amplifier
Protection. When Speaker is lit the voice coil protection circuit is in operation
to prevent over powering the voice coil. Short term blinking indicates high
average power of the program signal, sound is not affected. Amplifier
indicates the amplifier thermal protection is engaged, this shuts down the
amplifier and its sound output. It will reset automatically when its operating
temperature is safe. If it occurs check the heatsink location to make sure it
in a normal environment. It should not be in the path of very hot air.
Power Switch
AC switch for switching the Plasma's power ON or OFF. The switch lights after
turning the power ON. Make sure that the AC cord is correctly connected if the
switch is not lit upon turning the power on. If the AC cord is correctly connected
and the AC switch does not light upon power-on, please contact your local
dealer.
AC Fuse
During normal operation the AC fuse of the Plasma only blows at the occurrence
of a malfunction. Exchanging the fuse is only permissible using a fuse of the
same type (current, voltage and release characteristic). In case the fuse blows
frequently, please contact your local dealer.
AC Connector
AC connection is established via a PowerCon connector. A 15' (5m) long AC cord
with PowerCon plug is supplied.
CAUTION: THIS APPLIANCE HAS NO USER-SERVICABLE PARTS INSIDE. LEAVE
ANY SERVICING AND MAINTENANCE QUALIFIED SERVICE TECHNICIANS ONLY.
Plasma Owner’s Manual