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Hifonics 2010D BXI stuck in protect mode, suggestions?
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<blockquote data-quote="Infaredsinsor" data-source="post: 7652537" data-attributes="member: 637327"><p>Virtually all amplifiers have some sort of active protection circuit. Most have the following types of protection circuits:</p><p></p><p>Overview of the Most Common Circuits:</p><p></p><p>Over-Current Protection:</p><p></p><p>Over-current protection is typically used to shut down the amplifier if too much current flows through the output transistors. The most common circuits monitor the voltage across the emitter resistors. When the voltage becomes too high (due to high current flow), a transistor switches on and tells the amplifier to shut down.</p><p></p><p>Thermal Protection:</p><p></p><p>Thermal protection shuts the amplifier down when it gets too hot. Typically, only the temperature of the heatsink is monitored. If the heatsink is large, there will likely be more than one thermal sensor. In some cases, the temperature of the large filter capacitors and the temperature of the transformer are also monitored. The most common thermal sensor is an NTC thermistor. Some amplifiers use snap action thermostats but they are not too common in the newer amplifiers.</p><p></p><p>DC Offset Protection:</p><p></p><p>DC offset protection shuts the amplifier down when there is an unacceptable level of DC on the speaker output terminals. Generally, the feedback circuit keeps the DC offset well within acceptable levels but sometimes a component will fail which will cause the DC voltage on the output terminals of the amplifier to become high enough to destroy the speakers. Before any speakers are damaged, the DC offset protection circuit shuts the amplifier down.</p></blockquote><p></p>
[QUOTE="Infaredsinsor, post: 7652537, member: 637327"] Virtually all amplifiers have some sort of active protection circuit. Most have the following types of protection circuits: Overview of the Most Common Circuits: Over-Current Protection: Over-current protection is typically used to shut down the amplifier if too much current flows through the output transistors. The most common circuits monitor the voltage across the emitter resistors. When the voltage becomes too high (due to high current flow), a transistor switches on and tells the amplifier to shut down. Thermal Protection: Thermal protection shuts the amplifier down when it gets too hot. Typically, only the temperature of the heatsink is monitored. If the heatsink is large, there will likely be more than one thermal sensor. In some cases, the temperature of the large filter capacitors and the temperature of the transformer are also monitored. The most common thermal sensor is an NTC thermistor. Some amplifiers use snap action thermostats but they are not too common in the newer amplifiers. DC Offset Protection: DC offset protection shuts the amplifier down when there is an unacceptable level of DC on the speaker output terminals. Generally, the feedback circuit keeps the DC offset well within acceptable levels but sometimes a component will fail which will cause the DC voltage on the output terminals of the amplifier to become high enough to destroy the speakers. Before any speakers are damaged, the DC offset protection circuit shuts the amplifier down. [/QUOTE]
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Hifonics 2010D BXI stuck in protect mode, suggestions?
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