[aphexii]

Forgive my newbness, I'm still learning how to use half these tools

Quote:

With your multimeter set to Ohms mode (use the lowest resistance range on a manual-ranging meter), check for short circuits between the points listed below. If you read less than a few Ohms for any of these, then there is a short circuit. Carefully locate the short (such as a solder bridge) and fix it. * Battery + and - contacts * U4 pins 7 and 4 * U4 pin 7 and IG * U4 pin 4 and IG * U5 pins 8 and 4 * U5 pin 8 and IG * U5 pin 4 and IG * Output jack tip (OL) to sleeve (OG) * Output jack ring (OR) to sleeve (OG) * Output jack tip (OL) to IG * Output jack ring (OR) to IG * Output jack sleeve (OG) to IG

I have a nice craftsman auto ranging multimeter. From what I understand, I flip it to Ohms mode (0.L shows up on the display), then I press one tip to each of the above. If anything shows up other than 0.L I am ok? Is that right? Also, does it matter which color tip I use on each point (red/black)?

 

[heatmizer]

What happens when you touch the 2 leads together? It should read 0 ohms. red and black oriantation won't matter for ohms testing. It will matter for voltage tests. Red positive Black negative

Also check out Tangents video on how to use a multimeter:
How to Use a Multimeter

 

[aphexii]

Thanks!

 

[luvdunhill]

Quote:

Originally Posted by heatmizer /img/forum/go_quote.gif red and black oriantation won't matter for ohms testing

this isn't technically true once the components are in a circuit. For example, transistors and diodes can effect ohm readings. Probably doesn't matter for the original poster, but just a point that may need clarification.

 

[aphexii]

Ok, got up to the Output jack tests and nothing is working right here. Checked for solder bridges, none around em as far as I can see. Any ideas?

 

[aphexii]

YES! FIXED IT!!!!!!!!!

But now I have another slight issue. At low volumes the left channel seems to get louder faster, the louder it gets the more even the volume gets. It also seems to cut in and out (loud/soft real quick) at low volumes.

Any ideas?

 

[aphexii]

Ok, i think its gotta be something with the volume jack (i assume), if i pull up on the knob ever so slightly, it works fine. As soon as I let go, the left channel gets VERY loud (even at min volume).

Does the fact that i'm running it outside a case right now (on a piece of wood) have anything to do with it?

 

[aphexii]

Ok, i think there may have been a bridge between OL and OG. Would that cause the super loud left channel as soon as I turn it on?

 

[amb]

Most likely bad solder joint on the volume pot.

 

[aphexii]

Quote:

Originally Posted by amb /img/forum/go_quote.gif Most likely bad solder joint on the volume pot.

And you are 100% correct sir. Thank you!!

I reflowed the output jack first (wasn't happy with my work there) and figured i might as well do the volume at the same time. Right after I finished desoldering the volume i saw your update, got excited, reflowed the joints, crossed my fingers and WOOOHOOO! Worked!

Thanks so much for the quick reply!!! Can't wait to hear these with my ESW9's. I'm also visiting my dad this weekend, were gonna get started on working on our Hammond clone out of wood, hopefully can build something nice.

Thanks again!