Re: FSP400-60GLN worth fixing?
For sure 1A didoes are fine. First, 1N4007 are 1A and it mostly works fine with them. Becase the question here is whether the diodes overheat so much they kill the caps, or the caps die first and the extra switching makes diode overheat so much. I think that 1N4007 may be almost fine for normal operation but when caps start going down, it burns itself to dust. Faster diode is better because it produces less heat already and with quality caps it should never fail again.
Second, because of available space/diode (and electrode) size you won't squeeze more than maybe 2 A anyway. That 75ns time is OK, ordinary diode is around 1 us (and they usually do not even state the time). One of the diodes needs to be 1 kV, other may be just 100-200 V, that will work OK.
As for resistors, use ordinary SMD resistor. I think all of them are from the same material but it should not play any role - the thing is the actual resistive area is so small they will burn anyway (remember that great part of the resistor is just package). Unlike ordinary resistors which can handle much higher power before they overheat and burn hence why you seen fireworks before it affected the resistor itself.
For sure 1A didoes are fine. First, 1N4007 are 1A and it mostly works fine with them. Becase the question here is whether the diodes overheat so much they kill the caps, or the caps die first and the extra switching makes diode overheat so much. I think that 1N4007 may be almost fine for normal operation but when caps start going down, it burns itself to dust. Faster diode is better because it produces less heat already and with quality caps it should never fail again.
Second, because of available space/diode (and electrode) size you won't squeeze more than maybe 2 A anyway. That 75ns time is OK, ordinary diode is around 1 us (and they usually do not even state the time). One of the diodes needs to be 1 kV, other may be just 100-200 V, that will work OK.
As for resistors, use ordinary SMD resistor. I think all of them are from the same material but it should not play any role - the thing is the actual resistive area is so small they will burn anyway (remember that great part of the resistor is just package). Unlike ordinary resistors which can handle much higher power before they overheat and burn hence why you seen fireworks before it affected the resistor itself.
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