A friend brought me this from the states to be fixed, before lifting the board these are what’s obvious to my multimeter (except HIP4080 and TC4424) Sir Babin always insist the 4424 must be changed after PS failed also the audio driver IC must not be an overlook as they also fails easily. My problem now is can I just replace the one bank of P50NE10 only (aftermarket availability) or should I replace ALL?
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I don't think I've ever seen a 4424 survive in these amps when the PS FETs fail.
The 10 ohm resistor may have opened.
Did the rectifier fail?
The 4080s often fail but you can check them to see if they are OK.
If you have to replace everything highlighted, you may as well replace the last group of output transistors. I've had trouble with outputs in these (4080) amps. If the exact replacements don't work as expected, try the IRF3710Z.
The 10 ohm resistor may have opened.
Did the rectifier fail?
The 4080s often fail but you can check them to see if they are OK.
If you have to replace everything highlighted, you may as well replace the last group of output transistors. I've had trouble with outputs in these (4080) amps. If the exact replacements don't work as expected, try the IRF3710Z.
No, the rectifier didn’t fail, I encircled a bit too wide, I’ve called my local supplier already but he doesn’t has the ones with the “Z” but he has the 50NE10 so I’ll have to go with those, (when tested out of circuit it is only two of the output that is shorted). Is there any test to know if the 4080 is good or if I install the new output I can “test use or replace” without any further problems? The supplier has new ones, so if it’s critical to be fully active I could replace without risk the use of the old one on the new Fets.
If you still have some surviving outputs in the failed side, power up with the shorted ones out of the amp and see if the blown side works. Clamp the FETs so they don't overheat.
If it seems to be working as expected, does the 4080 run fairly cool?
The non-Z wasn't working for me. The Z was the only version that worked.
It's been a long time but if I remember correctly, the problem with incompatibility was new 4080s with new outputs that used the old part numbers. I think (not sure) that the old 4080s with the replacement outputs (with the original part numbers) may have worked. The new 4080s with new outputs required the 3710Z.
If it seems to be working as expected, does the 4080 run fairly cool?
The non-Z wasn't working for me. The Z was the only version that worked.
It's been a long time but if I remember correctly, the problem with incompatibility was new 4080s with new outputs that used the old part numbers. I think (not sure) that the old 4080s with the replacement outputs (with the original part numbers) may have worked. The new 4080s with new outputs required the 3710Z.
Mr Perry, I’m having an hard time to get the power supply from my supplier I come to pickup and he only has less than the amount needed, can the 3205 be used reliable, if yes what gate resistor I can use?