Aion Cerulean KOT Problem - Solved

[brucer]

Apologies if I'm missing anything, but I'm no great shakes with electronics and a first-time poster.  Happy to learn/follow instructions though!  Please help me find what I'm missing so I can fix this build!

It's a Marshall Bluesbreaker OD built to King of Tone (KOT) specs provided in the BOM (https://aionelectronics.com/project/cerulean-bluesbreaker-overdrive/).  It includes the clipping diode selection switch and hard clipping mod switch recommended for the KOT.  To the best of my ability, all parts and connections are per the BOM – KOT specs.

In general terms, I can get bypass signal in my testing rig, but no effect signal (zero output via effect circuit).  I've tried probing the circuit and I don't get signal past R4 ... in a circuit-tracing-linear-fashion anyway (i.e I do get signal at some other points further along in the circuit – e.g. R5, R7, but not at the volume pot). 

I've gone so far as to remove R4, verify its value and put a new verified R4 in place, but soldered one end directly to the lower pin of C5 in case the lack of signal through R4 was due to a PCB error.  No joy. 

I've double-checked my wiring, part values, parts orientations and soldering (still, apologies in advance if you find/point out errors).

DC measurements are as follows:

IC1:
- Pin 1: 4.62
- Pin 2: 4.64
- Pin 3: 4.55
- Pin 4: 0
- Pin 5: 2.37
- Pin 6: 4.74
- Pin 7: 4.74
- Pin 8: 9.28

Q1: N/A (omitted)

D1:
A =4.09
K =4.63

D2:
A =3.55
K =4.09

D3:
A =3.03
K =3.55

D4:
A =4.63
K =3.02

D5:
A =4.64
K =4.64

D6 (jumper):
A =4.62
K =4.62

D7:
A =4.64
K =4.64

D8 (jumper): 
A =4.62
K =4.62

DX1:
A =4.26
K =4.60

DX2: 
A =4.60
K =4.25

Positive lead at jack: 9.32
9V in at board: 9.32
Ground in at board: 0

Photos follow:













Any constructive help would be greatly appreciated.  I'm also happy to do more probing/measuring if that would help, but would need some direction. 

Thanks!

[Kipper4]

If you ommitted Q1. Where is the volume pot soldered to?

[brucer]

If you ommitted Q1. Where is the volume pot soldered to?

Errrr, yeeaaahhh.  That.   

Totally right Kipper4.  I missed a jumper (F1/F2), thinking that it only applied to the Morning Glory version (I misread/misinterpreted the BOM).

Thanks SO much for looking and commenting.  Totally appreciated.

My pedal works!!!!