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<blockquote data-quote="boogeyman" data-source="post: 6475926" data-attributes="member: 606913"><p>If the fuse in the amplifier is blowing, The problem is almost certainly IN THE AMPLIFIER. If the fuse is blowing as soon as power is applied to the amplifier (with no power applied to the remote turn-on terminal), The amplifer likely has power supply problems. Generally this means that the power supply FETs are shorted or the reverse protection diode is shorted. The FETs in the switching power supply generally fail when the amplifier is connected to an ohm load thats too low. The reverse protection diode is generally damaged when the amplifier is connected with reverse polarity (positive/negative connected backwards)........................................If the amplifiers fuse blows AFTER the remote terminal has power applied, its likely that the amplifier has shorted output transistors.The amplifier could also have problems like a shorted winding on the transformer or shorted rectifiers. If the fuse only blows after the amplifier is switched on AND the volume is turned up,there could be a problem with the speakers or the speaker wiring. The reason the amplifier doesnt blow fuses when the volume is all the way down is because there is no voltage on the outputs and therefore no current through the short circuit.</p></blockquote><p></p>

[QUOTE="boogeyman, post: 6475926, member: 606913"] If the fuse in the amplifier is blowing, The problem is almost certainly IN THE AMPLIFIER. If the fuse is blowing as soon as power is applied to the amplifier (with no power applied to the remote turn-on terminal), The amplifer likely has power supply problems. Generally this means that the power supply FETs are shorted or the reverse protection diode is shorted. The FETs in the switching power supply generally fail when the amplifier is connected to an ohm load thats too low. The reverse protection diode is generally damaged when the amplifier is connected with reverse polarity (positive/negative connected backwards)........................................If the amplifiers fuse blows AFTER the remote terminal has power applied, its likely that the amplifier has shorted output transistors.The amplifier could also have problems like a shorted winding on the transformer or shorted rectifiers. If the fuse only blows after the amplifier is switched on AND the volume is turned up,there could be a problem with the speakers or the speaker wiring. The reason the amplifier doesnt blow fuses when the volume is all the way down is because there is no voltage on the outputs and therefore no current through the short circuit. [/QUOTE]

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