This amp has me puzzled so looking for a bit of input. The amp will power up fine and after a 5 second delay will go into protect mode. So far I have checked all of the TIP36C's and TIP 35C's on the output side out of circuit but what has me confused is a bank of (4) IRFB4227's. They are circled in the photo. What I have come to discover is when I pull them the protection doesn't trip. I am not sure if they are outputs or what and what is driving them too. From drain to source they are showing .481V out of circuit which seems lower than normal for me when I check N-Channel Mosfets. I have an IC that I need help Identifying also in attached photo's im not sure if it is a driving IC or integrated protection or what the letters are scrapped off. Any information would be entirely helpful!
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U509 may be an IR2110 or an IR2113.
Do you see a pulse of DC voltage on any channel as you power up the amp? To check the sub channel, you will need to check before the relay.
Do you see a pulse of DC voltage on any channel as you power up the amp? To check the sub channel, you will need to check before the relay.
If your referring to checking the channels with an oscilloscope I have yet to get one. I do have Hz and Duty cycle on my multimeter. But what I can tell you is I am showing voltage on all channels until it switches into protect mode. I would guess this means the outputs are working until it switches into protect mode? What is even funnier is the longer I leave the amp sit and the capacitors drain out the longer it takes for it to switch into protect mode. Sometimes 10 to 20 seconds.
If all channels have DC offset (measured directly across the terminals for each channel), I'd suspect a missing supply voltage.
Would you happen to have anything close to reference and troubleshoot this amplifier? It is my first 5 channel hifonics and really have only familiarized myself with the bxi2010d's.
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I've never seen this amp and have never seen a maxxsonics amp with that class D circuit.
Have you confirmed that all rail and regulated voltages are present?
Have you confirmed that all rail and regulated voltages are present?
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