Help! Mistakes were made...Assembly of Crack Amp Kit [resolved]

[zaramon]

Ok, just to make sure I understand the procedure, I'm going to connect one lead to one of the flat prongs on the power cord and touch the other lead to the hot pin and take a resistance measurement and then switch this lead to the other cold pin and take a measurement. Then, repeat the process using the other flat prong on the power cord for a total of 4 measurements? Let me know if I've got anything wrong and I'll try to take some pictures of the results to share.

[Paul Birkeland]

What I would recommend is clipping one of your meter leads to the ground post on the IEC jack (the third terminal that wires to the chassis plate), then measure AC voltage between there and the N terminal, the little nib that goes to the L connection of the power cord, and the little nib that goes to the fuse holder. 

There may be some other measurements to take beyond that, but that's a good start.

[zaramon]

Ok, I added three pictures of measuring AC voltage with one lead on the ground post (E) and the other lead touching post (N) followed by the lead touching post (L). Lastly, the lead touching the little nib that goes to the fuse holder (which gave me a reading finally of around 117V). Does this provide some useful information?

[Paul Birkeland]

OK, this is getting close to the root of the problem.  Can you now repeat that measurement that gave you 117V but instead of the red probe to the nib, touch it to the bar that connects the incoming L to the fuse holder?

[zaramon]

Can you confirm if the bar that connects the incoming L to the fuse holder is labled as 1 or 2 in this picture or if it is located elsewhere?

[Paul Birkeland]

1

[zaramon]

That test gives me the same 118V reading.

[Paul Birkeland]

Now perform this same test with the probe clamped to G but measure the voltage where the black wire attaches to the IEC power entry module.

[zaramon]

Where is "G" located? I don't see that letter on my cheat sheet, is that short for "Ground" or something? Maybe if you could mark it on the picture it would be most helpful for me.

[Paul Birkeland]

Yes, the ground terminal, where one probe has remained clamped for all these tests.

[zaramon]

Ok, I measured the voltage between the ground and the black wire connecting to (L) as shown in the picture (I circled it) and got a reading of < 1V.

[Paul Birkeland]

Your fuse is blown or not installed correctly.

[zaramon]

Excellent! I'll start looking at that. Thank you for taking the time to work with me on this. Your time is very much appreciated!

[zaramon]

Thank you, Paul. The fuse does not have continuity. I couldn't see any breaks through the glass, but obviously it's not making a connection. Thanks again for helping me out!

[Paul Birkeland]

Do report back when you have a fresh fuse to let us know that all is well.

-PB