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Thermaltake TR2 RX-550 dead

Power Supply Design and Troubleshooting - Badcaps Forums - www.badcaps.net
I have a dead Thermaltake TR2 RX-550. This one has me stumped! Fuse OK, 166 volts to the main capacitor, but no 5vsb. For the 5vsb circuit, it has a 6 pin pwm surface mount chip on the bottom of the pc board which drives a TO-220 transistor. I cannot identify this chip. Can anyone tell what it is?????
Date: Dec 23, 2015   


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