Re: Samsung UN65JS9500 / BN44-00818A - no LED backlight
ok, I jumped the gun. The fuse is blown. I removed the primary side fets and they are shorted but the gate drive resistors and the fast-off gate drive res-diode groups look to be ok. The secondary fets also look ok. However, I realized this board has been sent in for repair already as all of these parts had already been changed before. I will see if I can find more into on who did the repair. The primary fets had been changed out with a slightly different part with lower gate charge but the specs seem similar enough I would have expected they would have survived. The original K15A50D were replaced with K20A60U FETs .
ok, I jumped the gun. The fuse is blown. I removed the primary side fets and they are shorted but the gate drive resistors and the fast-off gate drive res-diode groups look to be ok. The secondary fets also look ok. However, I realized this board has been sent in for repair already as all of these parts had already been changed before. I will see if I can find more into on who did the repair. The primary fets had been changed out with a slightly different part with lower gate charge but the specs seem similar enough I would have expected they would have survived. The original K15A50D were replaced with K20A60U FETs .
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