Haas 4015J-B Brushless Servo Amplifier
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The Haas 4015J‑B is a brushless servo amplifier used in CNC machines to drive the spindle or axis motors. Common failure modes include coolant contamination of the power cable connector, damaged or frayed motor cables, and loss of ground reference on the A, B, C pins. First‑check diagnostics: verify that the amplifier’s 24 V/48 V supply is within spec; inspect all power and signal cables for corrosion or disconnection, especially at the motor connector; measure resistance between the A, B, C pins and chassis ground to confirm proper grounding. If faults persist, review any error codes displayed on the machine controller and consider replacing the amplifier if contamination or cable damage is confirmed.[oss-gpt-20b] |
Need your Haas repaired or tested?
We specialize in the repair and refurbishment of high-end industrial control electronics and power systems like this unit.
- ⚙️ Fast Diagnostics – Same-day evaluation available
- 🔁 Reliable Turnaround – Most jobs ship within 5–10 business days
- 🧰 Expert Technicians – Decades of board-level experience
- ✅ 1-Year Warranty – Every repair fully guaranteed
📞 Call Now: 1 (336) 969-0110
Free Estimates • Industrial-grade testing • Nationwide Service
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- ✅ 1-Year warranty on completed repairs
Free Estimates • Industrial-grade testing • 1-Year Warranty • Nationwide Service
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🚑Shop Location🛠️
Industrial Electronic Repair
145 Rockwell Place Ct
Tobaccoville, NC 27050
🚑 Rush repair shipments only — no walk-ins.
📞Phone
📦Mailing Address🚛
Industrial Electronic Repair
931-E S. Main St #204
Kernersville, NC 27284
📦 Mailing Address (for invoices or shipped repairs)
No walk-ins accepted.