FANUC
FANUC Servo Amplifier Repair (A06B Alpha / Alpha i / Beta) — Mail-In
Component-level repair for FANUC servo amplifiers across the alpha, alpha i, and beta series (A06B-6079, -6096, -6114, -6117, -6130 and more). Free evaluation with a firm quote; typical repairs run $650–$1,500 versus $2,500+ for exchange units.
Coverage: Alpha (A06B-6079 / 6096) · Alpha i (A06B-6114 / 6117) · Beta i (A06B-6130 / 6132) · one to three axis
✓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
- ✓Servo alarms: overcurrent, IPM fault, discharge alarms
- ✓Blown fuses / trips main breaker
- ✓Dead amplifier — no LEDs
- ✓Fault after a motor or cable short
- ✓Overheat trips from failed cooling fans
Honest limits
- ✕Faults that live in the motor, encoder, or cabling (our evaluation identifies this honestly before you spend anything)
What you get
- ▸Free bench evaluation and firm quote — no work without your approval
- ▸IGBT / IPM power-stage replacement with new components
- ▸Gate-driver, DC bus, and control power-supply repair
- ▸Current-sensor and encoder-interface repair
- ▸Full recap of aged electrolytics as standard practice
- ▸Powered bench verification appropriate to the module class
- ▸24-month warranty
Your program is safe
Servo amplifier parameters live in the CNC, not the amplifier — a repaired amp goes back in without reprogramming in nearly all cases.
Common part numbers we see
Part-number pages for this service
What to ship
- ▸The amplifier module only — no motors or cables
- ▸The exact alarm number and what the machine was doing when it faulted
- ▸Machine make/model (helps us test against the right configuration)
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
What does a FANUC servo amplifier repair typically cost?
Most single-axis alpha/beta amplifier repairs land between $650 and $1,500 depending on the failure and module size — against $2,500+ for exchange units and far more for scarce models. The evaluation is free and the quote is firm before any work begins.
How do I know it's the amplifier and not the motor?
Tell us the alarm number — many FANUC alarms distinguish amplifier faults from feedback/motor faults. Our bench evaluation tests the amplifier independently, so if the fault is actually in your motor or cable we tell you, you pay nothing, and you've ruled out the expensive box.
Do you repair obsolete FANUC amps that FANUC no longer supports?
Yes — legacy Series 0 / 16 / 18 / 21-era amplifiers are a specialty. Third-party repair is often the only remaining service path for these, and donor components remain available.
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