Avalon Service Note 12: Adding Filter PWM input (updated)

video upload by Abstrakt Instruments

https://abstraktinstruments.com/

"Avalon Service Note 12: Adding Filter PWM input

Please note: This video was updated on July 16 after finding Resistor R328 was the incorrect value.

If you have an Avalon from the 6th run your unit may be missing a surface mount resistor relating to the filter PWM input. The result is that the filter CV offset feature and MIDI filter control are not working. This issue affects about 25% of 6th run units, approximately 80 units total.

Serial Numbers Affected: AVxxxx201704 between 0930 and 1044 (i.e.from AV090201704 to AV1044201704)

Please also see the service note here:

https://abstraktinstruments.com/conte... [PDF]

Tools: [Active links for the following on YouTube here.]
10mm low profile nut driver
https://www.digikey.com/en/products/d...

5.5mm low profile nut driver
https://www.digikey.com/en/products/d...

Slotted Nut Driver:
https://www.okwenclosures.com/en/Acc....
This part does not seem to be currently in stock. If using a flathead screwdriver be careful not to damage the enclosure, try to use your fingers first.

Parts: (these are generic parts - links below for example)
for Option 2:
1) 1k Resistor
https://www.digikey.com/en/products/d...
2) 100k Resistor
https://www.digikey.com/en/products/d...
3) 0.22uF Capacitor
https://www.digikey.com/en/products/d...

for Option 3:
1) 1k SMD Resistor
https://www.digikey.com/en/products/d...
2) 100k Resistor
https://www.digikey.com/en/products/d..."