Paragon Mini Channel 2 Problems

[GrahamHyman14]

So I finished up my second Paragon Mini build the other day and it went much smoother than my first attempt however the result was not the same haha. Channel one works perfectly and everything sounds great but when I engage channel two I get absolutely no sound at all. Both LEDs work and I get bypass sound until channel 2 is engaged. Here are my voltage readings for both IC chips (this is where I found my problem).
IC 1:
1: 4.4
2: 4.4
3: 4
4: 0
5: 4.4
6: 4.4
7: 4.4
8: 8.75
IC 2:
1: 1.43
2: 2.95
3: 4
4: 0
5: 4.4
6: 4.4
7: 4.4
8: 8.75

Seems like just pins 1 and 2 of IC2 are the problem. Anyone have any ideas as to what or where this problem may be occurring??

 

[GrahamHyman14]

I am also noticing that no matter what I do, R16 is measuring around 48k ohms when I’ve made sure it’s a 100k ohm resistor. R30 is measuring the correct 100k value. Not sure if this is supposed to be the case but I’ve tried everything I know how to do and can’t figure it out.

 

[PJS]

If you are measuring R16 and R30 in circuit then the value you measure will depend greatly on the position of the drive pot. With no signal to the pedal, the op amp will pretty much be regulating the voltages at pins 1 and 2 to match the input at pin 3. Any variation is caused by the feedback network (or a busted op amp). Have a look at R30, drive pot, C13, R22, R20, R21, C16, C17. Have a good visual inspection for bad solder, shorts, wrong values. Since there are 2 identical channels, have a good look at everything in this area and be suspicious of anything that does not look the same as what is in the working channel. Failing all that if you have the IC socketed and have a spare op amp (doesn't even need to be the same type for troubleshooting) pop it in there and see if that fixes it.

 

[GrahamHyman14]

If you are measuring R16 and R30 in circuit then the value you measure will depend greatly on the position of the drive pot. With no signal to the pedal, the op amp will pretty much be regulating the voltages at pins 1 and 2 to match the input at pin 3. Any variation is caused by the feedback network (or a busted op amp). Have a look at R30, drive pot, C13, R22, R20, R21, C16, C17. Have a good visual inspection for bad solder, shorts, wrong values. Since there are 2 identical channels, have a good look at everything in this area and be suspicious of anything that does not look the same as what is in the working channel. Failing all that if you have the IC socketed and have a spare op amp (doesn't even need to be the same type for troubleshooting) pop it in there and see if that fixes it.

You were right! It was a faulty drive AND volume pot. Had a replacement for the drive but gotta order another volume pot. Thanks for the help!