ok, so I'm working on this power supply. Seems it made have had something spilled on it at one time because it's sticky. Have been trying to clean with q-tips and alcohol. Anyway, I have 120v fine across the board to the hot areas. There is a bubble in the PCB near a the relay but the relay had 120v on one side and no 5V to pass through the other side so I've moved away from that for now.
After testing diodes I have found a xener shorted (red in pics). The diode in green is testing fine. I replaced the diode in red but it's still reading shorted so I believe there is a short between the 2 circuits of the diode somewhere else. I am currently suspecting the IC (SK202 yellow in pics) because the top 3 pins in the pic are shorting. Being that the trace for pin 1 is separate from 2-3 I assume it's shorted inside the IC but maybe it's supposed to be?
Also I flipped the closeup pic from the top so it matches the bottom when looking at both pics.
Curtis
After testing diodes I have found a xener shorted (red in pics). The diode in green is testing fine. I replaced the diode in red but it's still reading shorted so I believe there is a short between the 2 circuits of the diode somewhere else. I am currently suspecting the IC (SK202 yellow in pics) because the top 3 pins in the pic are shorting. Being that the trace for pin 1 is separate from 2-3 I assume it's shorted inside the IC but maybe it's supposed to be?
Also I flipped the closeup pic from the top so it matches the bottom when looking at both pics.
Curtis
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