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Date | Location | Type | Identified issue | Resolution | related for development | affected PCB version | fixed Version |
|---|---|---|---|---|---|---|---|
| 30 Aug. 2022 | BOM - Voices | ERROR | Mouser part number for the trimmer is invalid | Line 180: 652-3296X-1-103RLF | BOM update needed | -- | |
| 30. Aug 2022 | BOM - Mainboard | INFO | the 220uF caps on the Mainboard are BI-POLAR - | respect the BOM partnumber | |||
| 07 Sep. 2022 | Hardware Board | BUG | there's no Pinout described on the Hardware Board for the OLED - | please read the following INFO section carefully | can be improved with an silkscreen info | 1.0 | |
| 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) | - | - | - |
| 13.Sep | create a Silkscreen for MTA156 Powerheader pinout | 1.0 | |||||
| 15.sep | bom MB | flash 2x delivered | check bom - patrick |
Important INFOs before you start
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assembling
Date | Location | Type | Issue | Tip |
|---|---|---|---|---|
| 13. Aug.2022 | Hardware Board | INFO | minimize Slider/Potentiometer malfunctions Soldering Info | when you install the sliders, DO NOT solder all pins successively, solder only one pin at top and bottom and go to the next slider, when you have all installed - solder the next single pin at each slider. this have to respected on Potentiometers too. The Sliders and Potentiometers have lubrication inside which is sensitiv for heat and can be easily damaged (was happen on many Syncussion clones ) |
| 13. Aug.2022 | Hardware Board | INFO | OLED Selection and R101/R32 - R100/R102
| when you have an OLED with the PINOUT: VCC-GND-SCL-SDA install R100 and R102 (0 Ohm - a bridge) (R32/R101 must be empty) in case you have an OLED with the PINOUT: GND-VCC-SCL-SDA install R101 and R32 (0 Ohm -a bridge) |
| 13. Aug. 2022 | All pcbs | INFO | some IC Sockets do not point in the same direction as the others, it´s a known issue that people install ICs backwards | Double and triple check every IC orientation - maybe 80% of all device malfunctions happen because of that and often end in very expensive repairs |
| 13. Aug.2022 | Hardware Board, PSU, Mainboard | INFO | the LEDs do not work | when you build the device - its important to start with the power supply - here you can test the LED orientation. never trust the vendor pinout for LEDs. normally the long LED leg is the positive end (anode) (but some circuits are powered from negative rails and GND is the positive end in this case- just as an explanation) |
| 13. Aug. 2022 | Mainboard | INFO | solder the pins on the Edgecard holder where you find the white stripe on the PCB -
| you can't install the edge cards in the wrong way |
| Mainboard | INFO | keep the length of the power cable as short as possible - that minimizes the risk that you accidentally put the PSU card in a voice card slot | ||
| Hardware Board | INFO | pay attention to "Pot23 - Volume" (upper right corner) this is the one non-center detent pot. | ||
| 14.Aug.2022 | Mainboard | BUG | BOM1.0 Change- fixed in BOM v1.1 R103, R104, R105 = 330K (was 30k in BOM rev 1.0) R128, R143 = 10K (was 30k in BOM rev1.0) R137, R146 = 10K. (was 20k in BOM rev1.0)
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