Abstrakt Instruments VS-1 DIY

Silkscreen wrong

check that your PSU is still modified with other regulators

my psu was still modified with the correct parts

you have to respect that the MOLEX connectors on the Voice Motherboard and Voices have to installed in one step.

You cannot start with soldering the molex connectors at the pcb without align it against the opposite part.

do this: 

option 1:

1. mark every voice card with a number which match with the voice motherboard slot number
   1. insert the Molex pinheaders in the voice motherboard slot 1 without soldering it
   2. insert in voice 1 the molex connector and solder only one middle pin per connector, correct the alignment If required
   3. insert voice 1 in voice motherboard1 and solder one pin on the voice mobo Molex connector.
   4. check and align - solder more pins.

option 2:

a.  insert in voice 1 the molex connector and solder only one middle pin per connector, correct the alignment If required

b. insert in the connector the connector  which is required for the voice mobo.

c. put the voice to slot 1 and solder it - one pin per connector

d. check, align and solder more pins

Voice Cards BOM lists 1.5M resistor for R7 and R45, but those are already filled with 49.9K resistors as per the BOM and the schematic

wait on validation

do not populate R7 and R45

On the Output board - R22 isn’t listed on the BOM, schematic says 2.2K

C22 is DNP - do not populate

Q15, 16, 17, 18 aren’t listed on the BOM

"Note that R140 and R141 are the preinstalled smt resistors on the back."

"Brian for some reason doesn't list parts that are back in the "Rare Parts" list, so A3 is an CA3086N; A10, A12, A13, A14, A15 are all AS3080E; and A18 and A19 are AS3310."

"There is one wrong sized hole on the bottom row of holes for the molex connectors. In one of the videos Brian suggests using a dremel tool to grind down the size of the affected pin, which I tried and it was relatively easy and worked well. I suppose you could also drill out the hole, but you would then also drill out the solder pad, and would need to run a wire jumper from the affected pin to one of the vias to make that work."

30k resistor bag is labeled with quantity of 32 - in Altium is 24.

100nF caps 20 in bag and labeled with quant. of 20, BOM is quant. of 18 and in Altium

dort remove the pcb stripes (from pcb fab - panelized pcb) in case you use a solder frame. otherwise the traces can be damaged

use 1/4 watt resistors for R66/R67 to improve thermal noise

U2 wrong silkscreen orientation