Epson CA00 is the main logic board used in Epson Stylus Pro 4880 series printers, handling image processing, motor control, and communication with peripheral modules. Common failure points on this class of industrial printer boards include burnt or cracked capacitors, failed ICs (especially the image processor), damaged trace lines from thermal stress, and degraded solder joints on power input pins. First‑check diagnostics: verify that the 12 V/5 V supply rails are within spec using a multimeter; inspect the board for visual signs of component damage or overheating; and review any error codes displayed on the printer’s status panel (e.g., “E‑code” or communication timeout) to narrow down the fault source.[oss-gpt-20b]