❓ Question — from a maintenance engineer, Chennai
Our purchase team keeps ordering wrong Fanuc boards. The board has multiple numbers printed on it — A20B-8200-0545/07C, plus stickers with other codes. Which number do we actually quote?
✅ Answer — JJ Automation Technical Team
Always quote the etched/silk-screened A-number on the board itself, not the sticker barcodes. How to read it:
- A16B-xxxx-xxxx — full PCB assemblies (older generation motherboards, power boards, I/O).
- A20B-xxxx-xxxx — PCB assemblies, newer generation (most 0i-era motherboards, axis cards, display cards).
- A02B-xxxx-xxxx — complete UNITS (a whole control, LCD unit, MDI unit) — this is the number on the metal housing, not the board inside.
- A06B-xxxx-xxxx — amplifiers, motors, and their accessories.
About the suffix: in A20B-8200-0545/07C, the "/07C" is the revision/edition. For most exchanges, matching the 10-digit base number (A20B-8200-0545) is sufficient — revisions are backward compatible in the vast majority of cases. Exceptions exist for boards paired with specific software versions; if in doubt send us both the base number and the suffix.
Pro tips:
- Photograph the board BEFORE removing it — connector positions, jumper settings, and the battery (motherboards lose parameters without battery backup).
- The sticker with a long number starting "A20B-…" followed by a serial is fine too — but the etched number is definitive.
- For LCD/MDI units, give us the A02B number from the housing AND the machine's controller model (0i-TD, 0i-MF etc.).
Not sure what you have? Reply below with a photo (or WhatsApp it to +91 88022 12394) and we'll identify it free of charge.