e-licktronic Forum

Hi again,

I'm up to the noise section, at the point of testing the top right point on IC33, IC32, and IC31. I am measuring - 15V for all of these. On IC27, point 1, I am getting nothing.

Diodes are positioned correctly, as shown on the silkscreen and build photos. I've checked all my solder joints and re-soldered all the ones that were slightly questionable, and I'm getting the same results.

Also, after about 10 seconds I plug in the PSU, a very subtle high pitched electrical sound fades in, and it doesn't sound good.

I should mention that I did bridge together the joint between D3, and R196. I tried gently heating up and scraping the bridge (I didn't have the right tools at the time. I'm stupid.) and there is a mark/discoloration there now, but no solder. I've since bought a soldering pump and solder wick and cleaned out the joints and replaced both the diode and resistor as needed, but I'm still getting the same results

I'd very much appreciate any help. Thank you.

Also, I did measure my power supply. I'm measuring +14.77V, +4.98V, and -14.98V, so I believe I'm good there.

http://imgur.com/a/Jto5d

Here are some photos. You can see the mistake I made trying to clear the bridge the two joints in the bottom left of photo 2,3,4 and 5.

Here are 4 more photos showing the voltages if it's of any use. http://imgur.com/a/vr16q

I think I may have found the problem, but I still don't understand..

In my last post showing the photos of the wiring housing/harness. The red wire is going to +15V, Green to +5, Blue to GND, White to GND, and Black to -15V.

On the back of the board where J5 is installed, it's reversed..

Is this an error, or should I have reversed it the whole time? I mean when i wired it up, I went row by row. This is top to bottom, bottom to top, if you see what I mean.

Regardless, my mistake for not looking first.