Hello all, I'm currently working on a SounDigital 2400.4 EVOX. Would anyone happen to know which output fets are used?
Back story: When powered up, the amp has no power light or rail voltage and smoke comes from a few pins of the SG3525a. When I remove the output card, the amp powers up with a blue light and builds rail voltage with no issue.
So the issue seems to be a short on the output card. All output fets don't appear to be shorted when checking continuity between the gates/drain/source, so I believe the issue may be the irs2052m chips instead. But I'm planning on replacing the fets as well while I'm in there. Thanks in advance
Back story: When powered up, the amp has no power light or rail voltage and smoke comes from a few pins of the SG3525a. When I remove the output card, the amp powers up with a blue light and builds rail voltage with no issue.
So the issue seems to be a short on the output card. All output fets don't appear to be shorted when checking continuity between the gates/drain/source, so I believe the issue may be the irs2052m chips instead. But I'm planning on replacing the fets as well while I'm in there. Thanks in advance
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On this model of amp I have found that changing just the drive IC does not work. It is best to change the IRS2052M as well as the output fets. I have used ISC165N15NM6. I think Mouser has them.
I was able to repair the amp by replacing just the IRS2052M's, but I made the mistake of disconnecting the RCA cables while the amp was still powered on, which cause the output fets to blow! Why do SoundDigital amps do this? I've also had this happen to me on a 1200.4. I've never had this issue with other Brazilian boards.
Buy anyway, I was able to replace the output fets with FDMS86183's, they worked as they should. But thank you for the alternative fets, I may use them in the future!
Buy anyway, I was able to replace the output fets with FDMS86183's, they worked as they should. But thank you for the alternative fets, I may use them in the future!