The Nissei 8TP‑2B702 is the main CPU control board for the NEX series electric injection‑molding machines, handling process logic, motor drives and user interface functions. Common failure points on this board include degraded electrolytic capacitors, burnt or cracked IC packages (especially the TCTCRIR‑01 processor), and broken solder joints on power/ground traces; these often manifest as random resets, loss of drive signals, or complete loss of communication with the machine controller. First‑check diagnostics should verify that the 24 V DC supply is stable and within spec, inspect the board for visible burn marks or cracked components, and confirm I/O continuity to motor drivers and PLC inputs/outputs before proceeding to component replacement or reflow repair.[oss-gpt-20b]