Befaco VCMC 1.1 Assembly Manual Download Page 3

VCMC v1.1 - ASSEMBLY GUIDE Rev Jan 2021

TROUBLESHOOTING

At this point we will perform a smoke test and check that power arrives to every relevant spot in the board.
This is very important, as testing all this once mechanical components are soldered will be hard.

Connect the module to a power supply and follow next page diagram to measure 

ALL

 marked voltages.

If YOU ARE BUILDING STANDALONE VERSION, SOLDER USB CONNECTOR

.

If your power supply behaves funny or one of the regulators get hot, unplug the module immediately. Possible errors:
- One of the  regulators is reversed
- Reversed Diode.
- Reversed electrolytic capacitor.
- Maybe you have a bridge somewhere.

Use one of the marked GND spots and measure one by one  the voltages

If all voltages are good (keep in mind they might change a bit due to tolerances and your power supply) proceed with 
the rest of the build.
If you are facing issues, please follow our basic troubleshooting guide:

https://www.befaco.org/en/trubleshooting-questions/

3

Summary of Contents for VCMC 1.1

Page 1: ...ht change Check page 2 for details on this Modification from Eurorack version OPEN BAG A RESISTORS Qty Value Code Name on PCB 14 100k Brown black black orange brown R6 R7 R11 R13 R14 R15 R16 R17 R18 R...

Page 2: ...ered via the USB port and make it standalone Check every step for your relevant option this is a critical part REGULATORS Make sure it is positioned correctly with reference to the silkscreen outline...

Page 3: ...VERSION SOLDER USB CONNECTOR If your power supply behaves funny or one of the regulators get hot unplug the module immediately Possible errors One of the regulators is reversed Reversed Diode Reverse...

Page 4: ...or example you can use ICVs foam to stick it and make it stable Solder the 1x2 SMD pins as pictured that will be soldered at USB pads With extreme care solder them to the usb pins making sure they are...

Page 5: ...the board Once all pins are in place proceed to solder them all Now we will mount the spacers and the OLED Screen which are located on the mechanical side of the PCB SPACERS Secure the 7 mm spacers on...

Page 6: ...sockets Take care of polarity notch or dot mark orientation Qty Value Name on PCB 2 DG408 IC4 IC5 2 TL072 IC3 IC6 Now we will proceed to mount the jacks MIDI connector button and encoder This part of...

Page 7: ...e sure no legs are bent and all are passing thru their holes A mistake here will cause extreme suffering later If you power the module back in you should be able to check that fader columns move accor...

Page 8: ...is at the very end is CRITICAL as panel is really hard to remove once this connector is soldered Make sure everything works fine before doing so CALIBRATION We will perform now a factory calibration T...

Reviews: