Hi I had this card not work, not found short on high side fets,gpu core 0v8 present but not have pover 2 coils that are in same row withbthis,not know if they are for memory power or else. As I see fets gate are driving by uP1631p. 5v vcc is present on driver, 1v2 enqble pin also present but no pulses to gates.
Any info or datasheet for driver?
Tnx
P.S. off topic I also repaired sapphire, shorted IR3553M. I replaced but that phase not work, I found also not pulse from driver. Other IR3553M has pulse IN. But later 2 more IR3553M gone and there is IN pulse on those phases but after replace china IR3553M sti no pulses on output.
Once I use for repair those chips but is possibility thay are fake? If looks price in digikey is 4usd piece aliexpress 10 pirces for sqme money
Any feedback of china IR3553M?
Any info or datasheet for driver?
Tnx
P.S. off topic I also repaired sapphire, shorted IR3553M. I replaced but that phase not work, I found also not pulse from driver. Other IR3553M has pulse IN. But later 2 more IR3553M gone and there is IN pulse on those phases but after replace china IR3553M sti no pulses on output.
Once I use for repair those chips but is possibility thay are fake? If looks price in digikey is 4usd piece aliexpress 10 pirces for sqme money
Any feedback of china IR3553M?
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