Boss RV-3, LC8390M A/D problem??

[perfectsoundforever]

Hello everyone. I'm having some issues with a RV-3 pedal and I'd be super glad if someone can lend me a hand, because I'm completely clueless about this.

The pedal is working fine in bypass, but as soon as I turn it on it 1) the dry signal is missing 2) the reverb is all messed up, with a digital-kind of distortion. I've traced the dry signal and it stops at Q2, so I think the first problem is just that (I don't have a JFET to test it at the moment). And about point 2, I think there's an issue with the A/D converter.
Schematic: http://i.imgur.com/Fnmm3lQ.jpg
LC8390M datasheet: pdf.datasheetcatalog.com/datasheet/sanyo/ds_pdf_e/LC8390M.pdf

Here's what I measured:
I get a good clean signal at pins 2, 6, 8 and 12. I get a nasty distorted signal at 24. No sound elsewhere.

Voltages:
5, 11, 15, 18: ~5v
3, 9, 13, 16, 19, 20, 21, 22, 28: ground
1: 2.44v
2: 2.62v
4: 2.42v
6: 2.62v
7: 2.43v
8: 2.60v
10: 2.42v
12: 2.62v
14: 0v
17: 0v
23: 2.43v
24: 2.90v
25: 2.37v
26: 2.42v
27: 4.84v
29: 4.84v
30: 4.84v

I have no idea about how this works or how it interacts with the other ICs so I can't do much. Could the problem be elsewhere???

Any help would be appreciated, thanks in advance!