This one is stumping me for the moment.
THE PROBLEM - No power at all. No power LED. No visual or audible changes when plugged in or power button pressed. "CON3" shows no output voltages to the digital board. IC8 is
CHECKED COMPONENTS - Both fuses, all electrolytics (under HS3 - heatsink 3) were checked and confirmed. MOSFET's all checked good.
CHANGED COMPONENTS - IC4 (KA431AZBU Shunt Regulator), IC8 (PWM chip), IC1 (on back)
If you notice Q1 wasnt on the board, it will be shortly. I just removed it for the moment. It is a 2n4403. It checks ok as well.
I have no documentation on this power supply. I find lots of people fix these on ebay. This board is listed on there either as IPOS 150 or 120. This one is the IPOS 150 Rev.3.3. (200-P00-HIVI150-CH).
THE PROBLEM - No power at all. No power LED. No visual or audible changes when plugged in or power button pressed. "CON3" shows no output voltages to the digital board. IC8 is
CHECKED COMPONENTS - Both fuses, all electrolytics (under HS3 - heatsink 3) were checked and confirmed. MOSFET's all checked good.
CHANGED COMPONENTS - IC4 (KA431AZBU Shunt Regulator), IC8 (PWM chip), IC1 (on back)
If you notice Q1 wasnt on the board, it will be shortly. I just removed it for the moment. It is a 2n4403. It checks ok as well.
I have no documentation on this power supply. I find lots of people fix these on ebay. This board is listed on there either as IPOS 150 or 120. This one is the IPOS 150 Rev.3.3. (200-P00-HIVI150-CH).
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