| Symptom | Likely cause | Check | |-----------------------------|---------------------------------------|-------------------------| | No output, board warm | Reverse VCC/GND | Pin 1 & 2 polarity | | FLT always low | Missing pull-up or genuine fault | Measure pin 7 voltage | | DATA reads constant high | Board in output mode but no data | Toggle EN pin | | Intermittent latching | LATCH pulse too short or noisy | Increase to 1 µs, add 100pF cap |
Need more details? If you have a specific CBA-R01-S07PAR board variant or can share a photo of the PCB, further pinout verification is possible. cba-r01-s07par pinout
The board uses a (0.1″ / 2.54mm pitch), typically labeled J1 or P1 on the PCB silk screen. Mating connector: standard female Dupont or Molex KK-series housing. | Symptom | Likely cause | Check |