Hello, sleeve bearing fan. Prepare to be scored on.
Looking at the innards of the unit, we find some guts that originated in the factory of Sirfa.
Two Y caps and an X start us off for line filtering.
Soldering on this unit is good but not great. I have seen some fantastic Sirfa units, but this is not one of them.
More line filtering is found here with two coils, two X caps, two Y caps, and a TVS diode.
There's our bridge rectifier now, with that big yellow capacitor apparently having broken free of the glue holding it to the bridge heatsink. That's not an overly big deal, but enough vibration in shipping might have broken a lead on that. Sirfa should have secured it to the coil, and not the bridge heatsink.
Rubycon made the primary filter cap, so the box was right on that point.
A CM6800 variant is our PWM controller today.
The business side of the VRM. The controller handles both the 3.3V and 5V rails, with the MOSFETs divided evenly between them. I've seen that VRM controller in a lot of units now. Everyone from CWT to Seasonic uses it.
Soldering is slightly better on the modular board.
Not much to look at on the other side. I like that Sirfa used big 14 gauge wires to connect to this, rather than a ton of smaller wires.
All secondary side filtering is done by Teapo. Interestingly, this is actually a dual 12V design with jumper wires used to bridge them.
See that brown wire there? That's for 3.3V sensing ability. Yes, folks, this unit actually monitors the voltage at the ATX connector on the minor rails and adjusts them accordingly. Why it didn't do that can be blamed entirely on the connector not making good contact.
It's too bad there's no 12V sense wire. That might have improved all three main rails just a smidgeon.
Two 30N60S1's are the main switchers.
The 12V output heatsink. Five 034NE7Ns for the 12V output, and one SBL05L40C for the standby output.
And last of all, this is our PFC heatsink. I don't know what that mess is on the diode, but I ain't cleaning it up.
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