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Currently identified Errors / Omissions / Errata:
| Issue ID | Date | Location | Type | Identified issue | Resolution | related for development | affected PCB version | fixed Version |
|---|---|---|---|---|---|---|---|---|
| 1 | 30 Aug. 2022 | BOM - Voices | ERROR | Mouser part number for the trimmer is invalid | Line 180: 652-3296X-1-103RLF | BOM 1.0.0 and 1.0.1 update needed | -- | |
| 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 | create a Silkscreen for MTA156 Powerheader pinout | 1.0 | |||||
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Important Information before you start assembling:
| Info ID | Date | Location | Type | Issue | Tip | |
|---|---|---|---|---|---|---|
| 1 | 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 the top and the bottom and proceed to the next slider, when you have installed all of them - solder the next single pin of each slider. this has to be respected with potentiometers too. The Sliders and Potentiometers have lubrication inside which is sensitive to heat and can be easily damaged (this mistake was made in many Syncussion clones ) | |
| 2 | 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 left empty) in case you have an OLED with the PINOUT: GND-VCC-SCL-SDA install R101 and R32 (0 Ohm -a bridge) | |
| 3 | 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 | |
| 4 | 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) | |
| 5 | 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 | |
| 6 | 14.Aug.2022 | 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 | ||
| 7 | 14.Aug.2022 | Hardware Board | INFO | pay attention to "Pot23 - Volume" (upper right corner) this is the one non-center detent pot. | ||
| 8 | 14.Aug.2022 | Mainboard | BUG | BOM1.0 Change- fixed in BOM v1.0.1 R103, R104, R105 = 330K (was 30k in BOM rev 1.0.0) R128, R143 = 10K (was 30k in BOM rev1.0.0) R137, R146 = 10K. (was 20k in BOM rev1.0.0)
| fixed on 24.Sep.2022 in BOM 1.0.1 |
PCB Scan Pictures (thanks Janne.I)
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- install the SMT capacitors as before described in the Breakoutboard section.
- install the resistors - read ISSUE ID2 and respect in the BOM the resistors which are not populated - solder all pinsthis info is at the end of each section in the BOM. fill the solder holes or use a tape/pen to have a notice there. otherwise it can be confusing.
- install the ceramic capacitors - solder all pins
- install the IC sockets - standard IC sockets preferred - solder all pins after you have checked the alignment
- install the Transistors/regulators, quartz - do not overheat the pins here
- install the Filmcapacitors/Electrolyte caps and solder one pin - align the capacitors before you solder the second pins.
- install the EDGE connectors - solder only at top and bottom a pin and check the alignment, solder from left to right to minimize overheat problems with the connectors.
- don't forget to solder bridges at the white flat line on the EDGE cards as shown in the above table.
- check the soldering on the EDGE card pins carefully for shorts/solder bridges.
- wash/clean the pcbs carefully with respect on ESD safe handling
- install the ICs
- Double and triple check the IC orientation ( tip: mark with a pen all ICs which did you checked)
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