Product Description
The Fanuc A20B-8101-0790 is a robust and reliable main printed circuit board (PCB) engineered for seamless integration within Fanuc CNC systems. This meticulously crafted board serves as a central processing unit, orchestrating vital functions such as data processing, axis control, and communication with peripheral devices. Its advanced circuitry and durable components ensure optimal performance and longevity, minimizing downtime and maximizing productivity in demanding industrial environments. The A20B-8101-0790 undergoes rigorous testing and quality assurance procedures to guarantee consistent operation and adherence to stringent industry standards. It is a critical component for maintaining the precision and efficiency of your Fanuc CNC machinery, representing a sound investment in the continued success of your manufacturing operations. This board is essential for controlling complex machining processes and maintaining the overall stability of the CNC system. It directly impacts the accuracy and speed of automated tasks, contributing to enhanced throughput and reduced production costs. Proper maintenance and handling are imperative to preserve the integrity and functionality of this board, ensuring years of dependable service. The A20B-8101-0790 is a cornerstone of Fanuc's commitment to providing cutting-edge technology and unwavering reliability in the field of industrial automation.
Is Your Device Showing These Signs?
A20B-8101-0790 malfunctions typically stem from memory corruption, requiring PROM replacement or data restoration. Axis control problems are frequent, often due to faulty servo amplifier communication or resolver signal degradation. Overheating is a concern, leading to component failure; inspect the heat sink and cooling fan. Backplane connector corrosion causes intermittent connectivity issues, necessitating cleaning or replacement. Power supply fluctuations damage sensitive circuits, so verify voltage stability.
Technical specifications
The Fanuc A20B-8101-0790 is a robust and essential main printed circuit board (PCB) assembly designed for integration within Fanuc CNC systems, specifically engineered to manage and coordinate critical machine tool functions. This meticulously crafted PCB serves as the central processing unit, responsible for executing complex algorithms, managing axis movements, and overseeing communication between various system components, including servo amplifiers, input/output modules, and the operator interface. The A20B-8101-0790 features a high-density component layout, incorporating advanced microprocessors, memory modules, and specialized integrated circuits to ensure optimal performance and reliability in demanding industrial environments. It undergoes rigorous testing and quality control procedures to guarantee seamless operation and adherence to stringent industry standards, providing a dependable solution for controlling intricate machining processes and maximizing productivity. This board is a direct replacement part, ensuring compatibility and simplified integration into existing Fanuc CNC installations, minimizing downtime and maintaining operational efficiency.
Our Repair Process for the
A20B-8101-0790
Our repair process for A20B-8101-0790 malfunctions begins with a thorough diagnostic assessment to pinpoint the root cause. Memory corruption issues are resolved through PROM replacement or data restoration procedures. Axis control problems are addressed by inspecting and repairing servo amplifier communication pathways and resolver signal integrity. Overheating concerns mandate a comprehensive inspection of the heat sink and cooling fan, with replacement performed as needed. Backplane connector corrosion requires meticulous cleaning or complete connector replacement to ensure stable connectivity. Power supply fluctuations are mitigated by verifying and stabilizing voltage output, with faulty power supplies replaced immediately to prevent further damage.
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