FANUC
FANUC PCB Repair — A16B & A20B Control Boards — Mail-In
Board-level repair for FANUC A16B and A20B printed circuit boards: control power supplies, I/O boards, memory boards, and interface cards from Series 0 through current controls. Free evaluation; typical repairs $300–$800.
Coverage: A16B- and A20B- series PCBs — power, I/O, memory, interface, display boards
✓Fixed — or it's free
Unrepairable units are refunded; evaluations cost $0
✓24-month warranty
Every repair covered, parts and labor
✓3–5 business days bench time
Rush (1–2 day) and emergency service available
✓Program preserved
Your application and settings stay in the unit
Symptoms this repair fixes
- ✓Dead control power supply boards
- ✓Alarm conditions traced to a specific board
- ✓Battery-leak corrosion damage
- ✓Cracked solder joints and connector wear
Honest limits
- ✕Boards with lost proprietary firmware where no dump exists (we tell you before any charge)
- ✕Severe multi-layer trace destruction (evaluated honestly)
What you get
- ▸Free evaluation and firm quote
- ▸Component-level repair: capacitors, regulators, logic, connectors
- ▸Corrosion and battery-leak damage remediation where viable
- ▸Functional verification appropriate to the board class
- ▸24-month warranty
Your program is safe
Machine parameters live in the CNC memory — tell us if this board carries battery-backed memory and we will handle it accordingly. Always back up your CNC parameters before removing boards.
Examples we see regularly
Part-number pages for this service
What to ship
- ▸The board in anti-static packaging (a clean bag + firm padding minimum)
- ▸The machine's control model and the symptom/alarm
Full packing guidance: mail-in instructions.
Ship your unit to
USPS
Control Board Lab
PO Box 120241
Arlington, TX 76012
UPS / FedEx
Control Board Lab
1009 Oakwood Ln # 120241
Arlington, TX 76012
Write your RMA number on the outside of the box and include it on a note inside. Units over 50 lb (large VFDs, spindle drives, industrial PCs in enclosures) ship by freight — contact us before ordering and we will arrange dock-to-dock shipping.
Frequently asked questions
Should I worry about losing machine parameters?
Back up your CNC parameters before pulling any board — that is best practice regardless of repair. If your board carries battery-backed memory, note it on the intake form; we maintain memory power during service wherever the hardware allows.
Start with a free evaluation
Ship it in, get a firm quote, approve before any work — pay nothing if it can't be repaired.
The Fixed-or-Free Guarantee: if we can't repair it, you don't pay for the repair.
Call (817) 799-7332 · 📱 Text us a photo of your unit · Email repairs@controlboardlab.com