| Electronics > Repair |
| Help Please, Switching Power supply shutting stright off. |
| << < (7/8) > >> |
| asis:
Hi, @JFerris321 Unfortunately, I do not see the SOT23 marking on the ceramic module. If there is one, it will be easier to do a “reverse”. |
| JFerris321:
Hi, sorry the pic was not a focused as it looked and by the time i realised i has soldered it back on, i have removed it again and read the details and added them on to the pic below. |
| asis:
@JFerris321 Hi, The resistor values need to be clarified. If desired, the resistor values on the ceramic module can be measured using sharp probes, touching the pads and polygons. I doubt the presence of resistor R10 (sputtering) under transistors T2, T3. |
| fzabkar:
If you break the connection between the AC GND and DC GND, does the problem remain? |
| JFerris321:
--- Quote from: fzabkar on June 19, 2024, 06:03:27 am ---If you break the connection between the AC GND and DC GND, does the problem remain? --- End quote --- I had missed this origonaly because i was focused on the AC connecting to the negative rail shutting the supply down, but the supply also fails if i connect the DC negative to the ground but not when only the AC connects to ground |
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