Hey I think this is my first post on the forum. I've been picking at this thing when I can and it's beyond me what's going on here. I went with the 2012 version because I usually etch my own boards and this one was right up my ally. All of the ICs I've measured are cool audio chips that worked fine on another build I did in the passed but decided to scrap.
For this one I get no delay at all - only clean signal. I've followed the setup as illustrated in the document and I've messed with the trimmers and pots quite a bit. I get the high pitch noise from the clock when I play with the clock trimmer and delay pot so I'd like to think the v3102 is doing okay.
Here are some voltages I took the other night;
IC2 V571
1- 1.83 16- 1.83
2- 2.93 15- 3.03
3- 1.83 14- 3.03
4- 1.21 13- 1.83
5- 0 12- 9.24
6- 1.83 11- 1.83
7- 1.83 10- 1.83
8- 1.21 9- .92
IC3 V3205
1- 0 8- 7.86
2- 4.1 7- 8.16
3- 3.81 6- 4.09
4- 3.85 5- 8.24
IC4 V3102
1- 8.24 8- 7.76
2- 4.09 7- 4.12
3- 0 6- 4.15
4- 4.41 5- 4.07
Q2
E- 3.34
B- 2.93
C- 9.24
Q3
E- 3.31
B- 3.8
C- 9.24
Q4
E- 2.6
B- 3.2
C- 9.24
Using an audio probe there is audio at the BBD's input but nothing coming out at pin 3 other than clock noise when the clock is running a bit high. I guess I'll check over that the bias section doesn't have any bad solder or traces. Other than that I have no idea where else to look. I've reviewed pretty much every Aquaboy debug page and compared relevant voltages to see if anything sticks out. I need some help lol :-\
Do any voltages look funky to anyone? I'd appreciate any feedback here. Thanks for having me!
Sorry guys I think I just realized I put this in the wrong trouble shooting sections. Should be etcher's paradise if I'm not mistaken.
Newbe mistake ::)
EDIT;
Found the bugger :o