Lauer PCS-100FZ screen

The Lauer PCS‑100FZ is a compact PLC HMI operator panel that integrates an LCD touchscreen, keypad membrane and control circuitry into a single enclosure. Common failure modes reported on this model include backlight or LCD panel failure (often due to capacitor degradation), touch sensor drift or loss of responsiveness, and wear or delamination of the keypad membrane causing key mis‑reads. For initial troubleshooting, verify that the panel receives its rated 24 V DC input and that the display power supply rails are within spec; inspect the LCD for visible cracks or moisture ingress; then check the I/O status of the touch controller and keypad lines for proper voltage levels and error codes in the PLC diagnostic log.[oss-gpt-20b]

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