| Electronics > Repair |
| BK Precision 2120 trace issues |
| << < (33/36) > >> |
| vexatag:
Ok, here are screenshots of the pins being tested. Screenshot order: * Switch pins when active * U601 pin 9 * U603 pin 3 * U603 pins 5 and 6 * U603 pins 7 and 14If needed, I can check the pins again in 1x mode because there's something fishy going on here. |
| bdunham7:
Is the scope turned on??? |
| vexatag:
Yeah, scope is on. |
| bdunham7:
OK, on U603, pin 7 is ground, pin 14 is 5 volts. Use your multimeter and see if that is so. If so, then you have to figure out why your scope doesn't show you that in those measurements--and the 10X setting is not likely to be the cause, so leave that at 10X for now to avoid any calamities. If you don't have proper power supply to U603, then we have a different issue somewhere. You checked all the power supplies way, way back, right? |
| vexatag:
--- Quote from: bdunham7 on March 22, 2021, 06:14:33 am ---OK, on U603, pin 7 is ground, pin 14 is 5 volts. --- End quote --- Pin 7 goes to ground, pin 14 measured around 4.3 volts. --- Quote from: bdunham7 on March 22, 2021, 06:14:33 am ---You checked all the power supplies way, way back, right? --- End quote --- I checked the power supplies at the beginning of this process, yeah. |
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