ISO-certified repairs with a 2-year warranty — technician-verified quotes within 24 hours, nationwide.
Product Description
The Fanuc A20B-8002-0230 is a robust and reliable main printed circuit board (PCB) essential for the operation of Fanuc CNC systems. This meticulously engineered board provides critical functionality, including processing data, controlling axes movements, and managing communication between various components within the CNC machine. It features a complex arrangement of integrated circuits, capacitors, resistors, and connectors, all rigorously tested to ensure optimal performance and longevity. The A20B-8002-0230 is designed to withstand demanding industrial environments, maintaining stable operation under fluctuating temperatures and electrical conditions. Its precise construction guarantees seamless integration with compatible Fanuc systems, facilitating efficient and accurate machining processes. Replacing a faulty main PCB with the A20B-8002-0230 restores the CNC machine to its original operational standards, minimizing downtime and maximizing productivity. This board is a vital component for maintaining the precision and reliability expected from Fanuc CNC equipment.
Is Your Device Showing These Signs?
A20B-8002-0230 commonly requires repair due to issues stemming from memory corruption, resulting in system errors and operational failures. Axis drive malfunctions are a frequent problem, often traced to faulty servo amplifiers or encoder feedback degradation. Resolving communication errors on the serial interface and addressing issues with the PMC logic are standard procedures. Complete replacement of failed capacitors and integrated circuits is necessary to restore optimal performance and prevent future failures.
Technical specifications
The Fanuc A20B-8002-0230 is a robust and essential printed circuit board assembly (PCBA) integral to the Fanuc CNC control system, specifically designed for demanding industrial automation applications. This axis control board facilitates precise and reliable control over servo motors, enabling accurate positioning and velocity regulation critical for machining operations. Featuring advanced digital signal processing (DSP) capabilities, the A20B-8002-0230 executes complex motion control algorithms with exceptional speed and accuracy. The board incorporates multiple feedback interfaces, accommodating both incremental and absolute encoders, ensuring closed-loop control and minimizing positional errors. Diagnostic features are embedded within the board's firmware, providing real-time monitoring of system performance and simplifying troubleshooting procedures. Constructed with high-quality components and subjected to rigorous testing, the A20B-8002-0230 delivers dependable operation in harsh industrial environments, contributing to increased machine uptime and enhanced productivity. This PCBA is a direct replacement part, ensuring seamless integration with existing Fanuc systems and minimizing disruption during maintenance or repair procedures.
Our Repair Process for the
A20B-8002-0230
Our repair process for the A20B-8002-0230 begins with a thorough diagnostic evaluation to pinpoint the root cause of the failure, focusing on memory corruption, axis drive malfunctions, serial communication errors, and PMC logic issues. We then proceed with component-level repairs, which include replacing all failed capacitors and integrated circuits. Axis drive malfunctions are addressed through servo amplifier repair or encoder replacement. Communication errors are resolved by troubleshooting and repairing the serial interface. Finally, rigorous testing is conducted to ensure the complete restoration of functionality and optimal performance before the unit is returned.
Your Guarantee: Warranty & Lifetime Support
Your satisfaction is our top priority, and we confidently stand behind the quality of our repairs. That's why every repair service is covered by our comprehensive 24-month warranty. Furthermore, we offer lifetime phone support – if you have questions or need assistance related to our repair down the road, we're here to help. Our service commitment is straightforward: we guarantee our work, and if you're not satisfied, we will make it right. Learn More about our Repair process.
Comprehensive Repairs You Can Depend On
We take immense pride in the quality and reliability of our work. Our process goes beyond simply fixing the immediate problem. We perform a comprehensive inspection of your main board (or other equipment) and proactively replace components known to be failure-prone or showing signs of potential future failure. Before any item is returned, it undergoes rigorous functional testing to ensure it meets performance specifications and operates flawlessly. Visit our main Repair Services page to learn more.
Save Significantly
Our primary goal is to save you hundreds, or even thousands, of dollars compared to the cost of new equipment replacement. By repairing existing components, we provide an economical solution that is also eco-friendly. At Roc Industrial, our commitment to integrity and community drives our consistent growth and ensures you receive a reliable, cost-effective solution.


Please Note: Roc Industrial operates as an independent service provider and is not an authorized distributor for the manufacturers or brands mentioned. Consequently, the original manufacturer's warranty is not applicable to items repaired or sold by us. Roc Industrial provides its own 2-year warranty on all repair services performed.
Buying Options
To receive a quote within 2 hours, please provide us with the details of your requirements. Our team will promptly review your request and send you a custom offer.
Ships from Rochester, NY