Question about Pioneer Gm-d8400m 1200w Max, Class D Mono Amp Gmd8400m
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Posted on Jan 02, 2017
here is a short test you can try, remove the rca audio cable from the amp & connect a diskman or toher audio o/p device that you can hook up with the same rca wires, turn on the amp & see if you have sound. you can also remove the speaker wires from the sub & using multi meter read the ohm's of the sub, most subs are 4 ohm. Hope this help locate your problem
Posted on Nov 04, 2006
Apart from the external DC power fuse (I hope you have one in-line), the majority of in-car amps have 2 mini fuses inside the unit to protect the output MOSFETs from overloading due to incorrect speaker connections, ie, if the output impedence is rated at 4ohms, anything less than that is considered to be a short circuit, and will overload the MOSFETs. After performing the tests suggested by KaeZoo, open the unit and look for printed markings on the circuit board, something like F1, F2, the fuses may not look like conventional fuses.
Posted on Jun 12, 2007
THE AMPS PERFORMCE IS DIRECTLY RELATED TO THE STATE OF THE BATTERY AND THE CONNECTION FROM THE AMP TO THE BATTERY, CONNECT THE AMP DIRECTLY TO THE BATTERY TO SEE IF THE SAME PROBLEM EXIST OUTSIDE THE CAR
Posted on Aug 28, 2008
SOURCE: blown fuses
there is a possibility that the current load is excessive nor there is a short circuit from elsewhere, do not try to install again a new fuse unless you are certain there is no shortages of any wire from inside the amp and throughout the system by physical inspection
also install the right value for your fuse meaning the right amp and voltage, high temp is an indicator of shortages and defective power transistor
Posted on Oct 06, 2008
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