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Nº532 Power Amplifier
Fault Protection
The Nº532 is designed to prevent damage to itself and associated
components. These extensive features protect both the critical
circuitry of the amplifier itself and shield connected loudspeakers
from serious damage due to critical high-power levels.
Basic protections designed into the Nº532 include fuses on the AC
input line for each transformer to protect against excessive current
conditions, such as driving shorted outputs. Inrush limiting
prevents premature aging of the power supply components during
power-up; once the power supply has been charged, this feature
goes off-line until the amplifier is powered up again.
The Nº532 power amplifier also incorporates a controlled clipping
circuitry to prevent output devices from saturating. The harsh
high-frequency harmonics typically generated by hard-clipped
output devices are avoided by the controlled clipping circuitry.
ML Net Fault Conditions
The slave devices in an ML Net system can report fault conditions to
the master device. Fault condition reports are displayed on the
display of the master device when the fault occurs. Some faults may
cause the Nº532 to enter Standby or Power Save mode.
Power-cycling the Nº532 clears the fault condition, providing the
fault condition no longer exists.
Note Some faults do not allow power to be reapplied to the amplifier until
the fault condition no longer exists to protect the amplifier from
damage.
The fault conditions reported are:
• Slave Device DC Offset – indicates that the Nº532 amplifier is
experiencing a signal-related fault.
• Slave Device Over Current – indicates that the Nº532 is
experiencing an over-current condition.
• Slave Device Over Temperature – indicates that the Nº532
amplifier is overheating.
• Signal – indicates that the Nº532 has experienced a general
signal fault.