Abstrakt Instruments VS-1 Assembly Manual page 20

Part 3: Install M9 panel nut to secure the encoder
(1) M9 Panel Nut (green) (Bag 20)
STEP 18: TEST POWER TO THE PCB STACK
https://youtu.be/LngRwWWeiq0
(1) 50mm 40-Position Ribbon Cable (Bag 8)
(2) M4 x 6mm Flat Head Black Oxide Screw (Bag 2)
Do not install the MCU module yet - you will test power first without it.
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Connect the 40-position ribbon cable (CN11) between the mainboard and voice motherboard.. This provides
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+3.3V, +/-15V, and 5V USB power to the PCB stack.
Make sure the unit is unplugged.
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Temporarily disconnect the power switch by removing the two quick connect terminals.
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Attach the power switch into the front panel.
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Reattach the two power switch wires by feeding them through the hole in mainboard & panelboard.
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Mount the front panel to the right side of the enclosure to temporarily secure in place. It's best to leave the left-
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side panel uninstalled at this time as there is more testing to do and it will get in the way.
Plug in the unit and turn on the power switch.
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Test +3.3V, +5VD, +15V and -15V using the test point on the Voice Motherboard. If ok proceed to the next
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steps.
STEP 19: TEST POWER TO THE OUTPUT BOARD
https://youtu.be/B2c_dBbDODc
(1) 50mm 20-Position Ribbon Cable (Bag 8)
(1) 50mm 16-Position Ribbon Cable (Bag 8)
Power off the VS-1
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Plug in CN17 & CN17
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Power on the VS-1
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Verify +15V & -15V on the Voice Motherboard is still good.
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