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Step 17Testing Part 2
Now we'll take a quick break from soldering for one simple test.
Set your multimeter to check for resistance, and set it to your lowest setting. Connect one probe to the VCC TEST wire, and place the other on the upper-most pad on the left hand edge, top side of the board. The pad we want is colored in red in the picture below.
All power coming to the UPCB comes through that pad, through the PTC, and through the jumper, before going to anyplace else on the board. By doing this test, we can confirm that the PTC fuse and power jumper have been properly soldered.
If the resistance is near 0, you are successfull. If it is near infinite resistance, you have a loose solder connection, either on one of the PTC legs, or one of the power jumper legs. Fix any problem, and continue.
Set your multimeter to check for resistance, and set it to your lowest setting. Connect one probe to the VCC TEST wire, and place the other on the upper-most pad on the left hand edge, top side of the board. The pad we want is colored in red in the picture below.
All power coming to the UPCB comes through that pad, through the PTC, and through the jumper, before going to anyplace else on the board. By doing this test, we can confirm that the PTC fuse and power jumper have been properly soldered.
If the resistance is near 0, you are successfull. If it is near infinite resistance, you have a loose solder connection, either on one of the PTC legs, or one of the power jumper legs. Fix any problem, and continue.
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