| Electronics > Repair |
| Help with dead AT PC Power Supply |
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| Harry_22:
Good. Please measure resistance between pins 8 and 4 of PWM. Double check that pin 8 PWM is connected to pin 4 of optocoupler. |
| naujoks:
The resistance between pin 4 and 8 on the PWM is 12k Ohm. There really is no continuity between PWM pin 8 and optocoupler pin 4. |
| Harry_22:
--- Quote from: naujoks on October 09, 2024, 12:36:50 pm ---Pin 4 of the opto coupler is connected to pin 6/7 on the board (pin 8 of the PWM). --- End quote --- --- Quote from: naujoks on October 09, 2024, 07:55:19 pm ---There really is no continuity between PWM pin 8 and optocoupler pin 4. --- End quote --- What pin of opto coupler is connected to pin 8 of PWM? Please send a photo with ะก10 marking. |
| naujoks:
Pin 8 of the PWM is connected to pin 5 of the optocoupler. |
| Harry_22:
--- Quote from: naujoks on October 09, 2024, 09:43:10 pm ---Pin 8 of the PWM is connected to pin 5 of the optocoupler. --- End quote --- Much better! Please measure the capacitance of C10. |
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