...
| Issue ID | Date | Location | Type | Identified issue | Resolution | related for development | affected PCB version | fixed Version |
|---|---|---|---|---|---|---|---|---|
| 1 |
|
| -- | BOM 1.02 | ||||
| 2 | 30. Aug 2022 | BOM - Mainboard | INFO | the 220uF caps on the Mainboard are BI-POLAR - | respect the BOM partnumber | |||
| 3 | 07 Sep. 2022 | Hardware Board | BUG | there's no Pinout described on the Hardware Board for the OLED - | please read the INFO section in the next table on "OLED selection" carefully | can be improved with better silkscreen information | 1.0 | |
| 4 | 13 Sep. 2022 | BOM: Voices | INFO | the Mouser BOM shows 32x 240pF C0G capacitors for the Voices - used in the OTA Filter. These are 10% tolerance. | you can change the capacitors to Polypropylene, Silver MICA, Styrene - with 1-2.5% or match good capacitors in this range with an LCR meter (check the data sheets of the meter) | - | - | - |
| 5 | 13.Sep.2022 | create a Silkscreen for MTA156 Powerheader pinout | 1.0 | |||||
| 6 | 29.Oct.2022 | Voices | BUG | VCO Sync use the wrong waveform | remove on every Voicecard IC3 (TL064). bend Pin 12 of the TL064 outwards, install the IC3 back in the IC socket and solder a resistor leg from Pin12 to Pin10 as shown:  | fix the PCB routing | 1.0 | |
| 7 | 17.Nov.2022 | PSU card | INFO | The DC-DC converter goes very hot after 30minutes, but its within the data sheet specs (65degrees Celsius is the max. operation). The 65 degrees can be reached in Summer or other conditions (few hours operating time) But for longterm stability of the components, I highly recommend the usage of a big cooler | install a 25x25mm cooler with an high of minimum 20mm. I found on tme.eu a product with self adhesive foil and 24.5mm height. the temperature of the DC.DC converter is 51 degrees after an hour on the regulator and 43 degrees on the cooler. TME Part nr. ATS-55250W-C1-R0 |
| 1.0 | BOM 1.02 is updated for this !! |
| 8 | 08.Oct.2023 update on 04.Nov.2023 | all voices | BUG | the Sync function must be fixed there's a "stepping" in the sync sound. respect Step 6 from the Issue list too. | update: 04.November 2023 there's a additional 10K resistor to be installed, which isn't described in the notes here. Connect an additional 10K Resistor to GND via PIN10. This resistor is shown in the ssi2131 data sheet.
a Facebook user made the change in a other way: "This is how i did the sync fix, i only had 1206 10k resistors, would be perfect with an 0805. Will put a drop of paint there, it will look nice (from a distance
| 1.0 | ||
| 9 | 15.March 2024 | Mainboard | BUG | Volume Potentiometer, only at the first 50% of rotation is the Volume gain impact given. at around 50-100% is only few dB volume change. | from BC officially: "Hey Everyone, here is the solution to the DIY volume issue. On the MB (motherboard), replace resistors R99, R100, R101, R102 with 100k 1%. click to enlarge:Voluem pot BUG
| change the BOM | 1.0 |
...