The Sokki Electronics DU102 is a digital read‑out controller used for X‑Y axis motion or process monitoring, typically powered from 85–264 VAC and featuring LED indicators and serial/parallel I/O. Common failure points in this class of units include burned capacitors on the power supply board, damaged input/output connectors, and cracked PCB traces due to vibration or thermal cycling. Begin troubleshooting by verifying that the unit receives correct line voltage and that the internal fuse (if present) is intact; then check all external I/O connections for continuity and proper signal levels; finally inspect the board for visible signs of component damage such as bulging capacitors, burnt solder joints, or corrosion on connectors.[oss-gpt-20b]