ashan000
Member
Last Activity: 07-27-2025, 05:59 AM
Joined: 07-24-2022
Location: Galle
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No freeze spray. But I tried rosin smoke method to see if any component gets heats. only one resistor gets heats a bit. could it be the problem? i mark that resistor with white color in attachment....
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yx-305d bench power supply decreasing voltage problem
This power supply is 30v 5amp. Problem is when turned on after about 3 minutes voltage starting to decrease slowly. (like - 5.8 > 5.7 > 5.6 > 5.5) can't see any damaged component or dry solder joints. Checked main 2 transistors with multimeter. Reading seems ok. Tried changing potentiometers(both coarse and fine) still the same situation. Can any one help me to troubleshoot? What voltages to check? Any ideas helps to fix this. thank you.!
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