SWF Original SDB Drive Board REV09C (DUP_CC) — P/N BD-000310,21, Color Change Drive

Color change faults that follow you across designs point here.
When color change errors persist regardless of the design, the drive board’s power stage or sensor path is suspect. This original SWF SDB board handles exactly that subsystem.
The board (REV09C DUP_CC, P/N BD-000310,21, SB1H50 logic, serial DECC18070022) drives the color mechanism and monitors its feedback.
What it connects
•COLOR CHANGE — color mechanism drive signals
•WIPER SENSOR — needle wiper detection
•LASER POINTER HALF TURN — laser positioning interface
•POTENTIOMETER — analog feedback input
•POWER / BACKPLANE B/D — supply and backplane communication
•JUMPER SETTING — potentiometer (1,2) and board type (2,3)
Built for duty. 8MHz clock, four power transistors on a large aluminum heatsink, and a second small heatsink for the corner power device.
Fitment: Match REV09C (DUP_CC) and P/N BD-000310,21. Note the file name says REV09G but the board reads REV09C — verify the actual printing before publishing.