Diagnostic report for Opus Reader accepting only certain card types. Includes possible causes, solutions, and safety warnings for commercial kiosks.
Check the device's configuration menu or contact support.
Note the card types and any patterns (e.g., all cards from a specific issuer).
Any such events could indicate hardware damage.
EMV/NFC card readers use inductive coupling to transfer power and data. Signal strength and data integrity are crucial. Card acceptance issues can stem from firmware configuration errors, antenna misalignment, signal attenuation, or damaged capacitors within the reader affecting the resonant circuit. NFC communication operates at 13.56 MHz. Variations in card manufacturing or wear can affect signal quality. ESD events can damage components.
The Opus Reader accepts some Opus cards, but rejects others. The device appears to be functioning otherwise (power on, display operational).
Handle the Opus Reader with care to avoid physical damage. Ensure the power supply is properly grounded. Do NOT attempt to open the reader casing. This will void the warranty and may damage the device's tamper-evident security features. Static electricity can damage the reader; ground yourself before handling. Ensure the device is disconnected from power before any cleaning or cable adjustments.
If the reader has a diagnostic mode (consult the manual), use it to test the NFC antenna signal strength. A significant drop in signal strength compared to a known-good unit indicates a hardware issue. Certain Opus cards have different antenna placements; try varying the card position slightly on the reader during testing.