First off, PQ2 was shorted. So I replaced it with a new one.
And now PQ2 does not output any voltages in pins 5-8. I think it's not being activated since pin 4 in both PQ2 and PQ1 are on high (18v).
So I noticed there's some OCP/OVP protection circuit in page 59. I think the relevant parts are PQ35, PR6. But I don't know how to make sure PQ35 is fine since I never tested its kind before, though it passes diode test I think. Also it has 18V in pins 1,3,4,6.
And now PQ2 does not output any voltages in pins 5-8. I think it's not being activated since pin 4 in both PQ2 and PQ1 are on high (18v).
So I noticed there's some OCP/OVP protection circuit in page 59. I think the relevant parts are PQ35, PR6. But I don't know how to make sure PQ35 is fine since I never tested its kind before, though it passes diode test I think. Also it has 18V in pins 1,3,4,6.
Comment