The Okuma E4809-770-138-A is a main control printed circuit board (often designated ICB1H / 1006-2120) for Okuma MIV series dual-axis AC servo drives (e.g., MIV0101A-1-B5 and similar). It serves as the central processor board handling multi-axis servo command processing, feedback decoding, PWM generation, and drive coordination. Features multiprocessor CNC technology for effective NC system functionality in machine tools. Plug-in module design. Discontinued by manufacturer; ideal for legacy Okuma CNC servo repairs/upgrades. [stock available]