Re: SMPS low Vout
You must mean C661 0.4v
Is pin 4 of opto 5.2 volts measured to hot ground? If it is, the power supply must be trying to work and giving you that voltage, that means you should have something on +12, I would think at least 4-5 volts
Could you be measuing those opto pins 3 & 4 wrong? reversed? The reason I ask is that the top247 should be outputing around +5 volts on its own
You should also be getting more than .4 volts on C661
If D662 is producing 5.2v. D661 should produce at least that much, Try removing one end of D661, Its only needed for the pfc circuit which is not working now anyway. With it removed, see if you get your +12v
You must mean C661 0.4v
Is pin 4 of opto 5.2 volts measured to hot ground? If it is, the power supply must be trying to work and giving you that voltage, that means you should have something on +12, I would think at least 4-5 volts
Could you be measuing those opto pins 3 & 4 wrong? reversed? The reason I ask is that the top247 should be outputing around +5 volts on its own
You should also be getting more than .4 volts on C661
If D662 is producing 5.2v. D661 should produce at least that much, Try removing one end of D661, Its only needed for the pfc circuit which is not working now anyway. With it removed, see if you get your +12v
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