Elcom A80ER‑HE/LE‑I/II‑RS is a high‑energy 75 BPI magnetic strip encoder used in industrial card reading and servo drive control systems. Common failures on this model include coil winding degradation, insulation breakdown between the encoder windings, and contact loss at the output terminals due to vibration or corrosion. The unit also tends to misread cards if the magnetic stripe is dirty or the reader head is worn. First‑check steps: verify that the supply voltage (typically 12–24 V DC) is within spec and stable; inspect the encoder coil windings for visible damage or shorted turns; examine the output connectors for corrosion, loose pins, or broken contacts before proceeding to functional testing with a known good card.[oss-gpt-20b]