Brand‑new original LDD23 PCB, part number 857C1059597, core control section board for Fuji Frontier 550,570,570R, LP5500, LP5700 digital minilab. Every board undergoes full‑function inspection & testing before shipment. Direct plug‑and‑play replacement for faulty original LDD23 board, fixes machine startup error, printing abnormality and related alarm codes. Reliable spare part for photo lab maintenance & repairing Fuji minilab printer.