Rockford fosgate p10002 enters protection

Mjimenez

Member
2017-12-20 3:08 am
Hi, how are you? I am working on this amplifier, it turns on normal and works at low volume, but as the volume increases it goes into protection and marks short. I have checked that the fault enters through pin 10 of the lm339d and I was given the task of reviewing the protection circuit and it turned out that in the right channel I activate the fault and it is protected, I already checked the protection circuit and it is well , in the diode that feeds towards the lm339d the voltage increases from 0 to 10 v when the fault is activated I ask for help to see if they can guide me to find what causes this it should be mentioned that I already check the fqa36p15 and fqa28n15 and they are fine that more could it be? attached a photo of the diagram with which I am leaning greetings
 

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Mjimenez

Member
2017-12-20 3:08 am
Hi Rick PA Stadel, Seankane and Mr Perry Babin .... Rick PA Stadel doesn't know what you mean by the activation threshold, how do I measure it? And if at one time I upload more of the schematic I am using. Seankane if I have monitored it and I have no DC at the output even when the protection trips. Mr. Perry Babin, the low value resistors connected to the source resistors are fine and the source resistors are also fine ... in the attached photo is where the increase in the voltage is given I will mark it through a transistor Q2003 (2L) and it reaches the diode D2000 from here it connects to the LM339D a voltage of 10 to 12v comes out when the volume increased and if it decreased the Protection disappears and everything about the schematic i checked
 

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