Dear Forum Members,
I have a PC mainboard with model GA-EP41T-USB3. I want to measure resistance to GND on the the ATX_12V line (called VIN in the schematics) by my multimeter in the resistance mode. When I do this measurement, first it shows 0 ohm then some capacitor in that line starts getting charged slowly and it shows 200 ohms then more and more and finally after 3 seconds, the resistance reaches the mega Ohm range.
this resistance measurement behaves the same whenever I try to measure it.
The ATX_12V line is connected to 4 high side Mosfets too which are shorted to the CPU Vcore, but not to GND. the CPU Vcore is not shorted to GND.
internal traces of the VIN line are bulged a bit due to an excessive current that has passed through it. but the internal traces can not be seen to check whether they are connected to each other or not.
Why does resistance on the VIN line take this long period to reach the mega Ohm range? is it due to a bad capacitor? or is it shorted? or is it normal to take this long?
I have attached the schematics document of this mainboard. the VIN line and its capacitors are located in page 37 of the document.
thanks
I have a PC mainboard with model GA-EP41T-USB3. I want to measure resistance to GND on the the ATX_12V line (called VIN in the schematics) by my multimeter in the resistance mode. When I do this measurement, first it shows 0 ohm then some capacitor in that line starts getting charged slowly and it shows 200 ohms then more and more and finally after 3 seconds, the resistance reaches the mega Ohm range.
this resistance measurement behaves the same whenever I try to measure it.
The ATX_12V line is connected to 4 high side Mosfets too which are shorted to the CPU Vcore, but not to GND. the CPU Vcore is not shorted to GND.
internal traces of the VIN line are bulged a bit due to an excessive current that has passed through it. but the internal traces can not be seen to check whether they are connected to each other or not.
Why does resistance on the VIN line take this long period to reach the mega Ohm range? is it due to a bad capacitor? or is it shorted? or is it normal to take this long?
I have attached the schematics document of this mainboard. the VIN line and its capacitors are located in page 37 of the document.
thanks
Comment