The Sokki Du 902 F is a digital read‑out module designed for lathe applications; it displays X and Z axis positions, can show radius or diameter values, and stores up to six cutting‑tool offset settings. Common failure points on this class of units include loss of display output (blank screen), drift or incorrect position readings, intermittent communication with the host controller, and power supply voltage fluctuations that trigger internal protection shutdowns. Initial checks should verify a stable 12 VDC input, inspect all connector pins for corrosion or loose contacts, and review any error codes transmitted by the host system. If the display remains unresponsive after these steps, proceed to test the module’s internal logic board with a multimeter and oscilloscope to locate faulty ICs or decoupling capacitors.[oss-gpt-20b]