Messages

Sorry for the delay.

I've cleaned the PCB with some isopropyl alcohol and re-flowed the solder. Still having the issue. It seems that the 'level' and 'feedback' pots are causing some problems. Just touching the pot can send the thing crazy even with the feedback turned down. Might try with a new set of pots and see if that works.

The voltages (corrected, thanks m-Kresol) IC 1 2.88, 3.38, 2.66, 0, 8.01, 3.95, 3.65, 2.91  IC 2 4.95, 2.47, 0,0,0, 2.47, 1.68, 3.82, 2.54, 0,2.45,2.47, 2.47, 2.48, 2.47, 2.65
IC 3 3.45 (fluctuates between 3.45 and 4.5), 3.81, 3.93, 0, 8.03, 3.63, 4.01, 3. 83  IC 4 3.88, 3.82, 1.92, 0, 8.00, 3.80, 3.78, 3.76

Uploaded cleaned photos as well.
http://imageshack.com/a/img921/8792/JsOl0N.jpg
http://imageshack.com/a/img922/6416/iLmCOS.jpg
http://imageshack.com/a/img924/3917/BOG3cR.jpg
http://imageshack.com/a/img922/2504/0gW3Hh.jpg

Thanks again for the help. Getting to the point where I might just order a new pcb. But really want to get this to work. So close

Thanks for the help guys, yeh. The board is a bit mangled, I did use a blade to scratch around the tracks. I'll try the isopropyl and recheck the pin values tomorrow and get back to you.
Thanks again for the help, I am fairly new to this so it is all a learning experience

Hey Guys,
I need some help with my dirtbaby build. Had a lot of problems solved some, but more seem to pop up. At the moment I can get the delay to work intermittently but the chorus/vibrato is non existent. If the feedback pot is in anything other than the minimum position the feedback goes out of control and distorts as though it was maxed out. Sometimes just touching the pots just cuts the signal out. Here is a link to photos of the board, both front and back as well as pinout readings for the ICs.

IC 1 - 7.4, 8.05, 3.84, 3.84, 0, 3.84, 0, 3.72. IC 2 - 4.97, 2.48, 2.47, 0, 0, 2.48, 0, 2.48, 2.74, 2.48, 2,47, 2.48, 0.38, 2.48, 0.75, 2.48. IC 3 - 7.37, 7.94, 3.83, 0.61, 0, 3.83, 0, 3.83. IC 4 - 1.44, 8.05, 2.64, 3.83, 2.57, 3.88, 0, 3.83.

Images:
http://imageshack.com/a/img921/2491/xxbESe.jpg
http://imageshack.com/a/img923/9651/ukCoNR.jpg
http://imageshack.com/a/img921/1416/AdqQSA.jpg
http://imageshack.com/a/img921/5076/PISYD4.jpg
http://imageshack.com/a/img921/9799/9AVH5o.jpg
http://imageshack.com/a/img924/3945/XlYKg2.jpg
http://imageshack.com/a/img923/7711/LeATxM.jpg
http://imageshack.com/a/img921/1576/YtEXRX.jpg

Thanks in advance for the help guys, sorry if I've missed something obvious but I am stumped. Please let me know if you need some more stuff to go on. Have tried replacing some of the pots, all the pots I'm using are brand new from mouser. I can record and upload an audio file of the problem if it would help.