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Product Description
The Fanuc A20B-3300-0021 is a robust and essential printed circuit board assembly, meticulously engineered for seamless integration within Fanuc CNC systems. This board is a critical component, responsible for managing and executing complex machine control functions, ensuring optimal performance and precision in automated manufacturing processes. Its advanced design facilitates high-speed data processing, precise axis control, and reliable communication between various system elements. The A20B-3300-0021 undergoes rigorous testing and quality assurance procedures to guarantee durability and dependability in demanding industrial environments. It is a direct replacement part, designed to restore and maintain the operational integrity of compatible Fanuc CNC machines, minimizing downtime and maximizing productivity. This board is a vital investment for maintaining the efficiency and accuracy of your automated manufacturing operations.
Is Your Device Showing These Signs?
A20B-3300-0021 malfunctions typically involve issues within the Fanuc Main CPU board, leading to CNC machine downtime. Common failures include corrupted memory modules requiring data restoration, axis control errors stemming from faulty servo amplifier communication, and program execution halts due to logic board failures. Resolving these problems often necessitates replacing damaged integrated circuits, reprogramming firmware, and thorough diagnostics of the I/O interface to ensure seamless operation and prevent recurrence of alarms. Addressing thermal issues through proper heat sink maintenance is crucial for long-term reliability.
Technical specifications
The Fanuc A20B-3300-0021 is a robust and essential printed circuit board assembly meticulously engineered for integration within Fanuc CNC systems, specifically supporting a range of servo and spindle drive functionalities. This board is critical for managing axis control, feedback processing, and communication protocols within the machine tool environment, ensuring precise and reliable operation. Featuring advanced signal processing capabilities and durable component construction, the A20B-3300-0021 facilitates accurate positioning, velocity control, and overall system stability. Designed to meet stringent industrial standards, this board undergoes rigorous testing to guarantee optimal performance and longevity in demanding manufacturing settings. It is a direct replacement part, ensuring seamless integration and minimal downtime during maintenance or system upgrades. The A20B-3300-0021 is indispensable for maintaining the performance and reliability of your Fanuc CNC machinery.
Our Repair Process for the
A20B-3300-0021
Our repair process for A20B-3300-0021 Fanuc Main CPU boards begins with a comprehensive diagnostic evaluation to pinpoint the root cause of the malfunction, focusing on memory, servo amplifier communication, and logic board integrity. We replace any damaged integrated circuits and reprogram firmware as needed to restore proper functionality. A thorough inspection and testing of the I/O interface is conducted to guarantee seamless operation and prevent future alarms. Data restoration is performed if memory modules are corrupted. Finally, we ensure proper heat sink maintenance to mitigate thermal issues and enhance long-term reliability before the board 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