The Futaba Pulscale CJX201 is a digital readout (DRO) system used on CNC machines to provide real‑time position feedback via a linear scale reader head and integrated display. Common failure modes reported for this model include incorrect axis scaling or offset errors (values drifting to many decimal places), display flicker or complete loss of signal, and power‑supply instability that can cause intermittent resets; these are often linked to faulty DIP switch configurations or degraded wiring connections between the scale reader and the DRO unit. For a first‑check diagnosis, verify the 12 V DC supply voltage at the DRO input, inspect all cable harnesses for loose or corroded connectors, and review the DIP switch settings against the manufacturer’s configuration table (typically found in the operation manual). If the display remains inaccurate, perform a scope check of the scale signal output to confirm proper pulse generation before proceeding with deeper board-level troubleshooting.[oss-gpt-20b]