Heldt & Rossi SM807DC Servo Amplifier
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The Heldt & Rossi SM807DC is an operational‑transistor servo amplifier designed to drive DC servo motors in industrial automation and CNC applications. Common failure points for this class of amplifiers include power supply degradation (over‑voltage, ripple), overheating of the transistor array, burnt or failed output MOSFETs, and damaged input/output signal lines. Begin troubleshooting by verifying the main power rail voltage and ripple against spec, inspecting the amplifier board for burn marks or swollen capacitors, and checking all I/O connections for continuity and correct logic levels; review any diagnostic error codes displayed on the host controller if available.[oss-gpt-20b] |
Need your Heldt & Rossi 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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- 🔧 Board-level diagnostics (shorts, VRM, memory, fan, thermals)
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- ✅ 1-Year warranty on completed repairs
Free Estimates • Industrial-grade testing • 1-Year Warranty • Nationwide Service
Other Repaired Units by Heldt & Rossi
Heldt & Rossi DX808 Servo DriveHeldt & Rossi SM807DC Servo AmplifierHeldt & Rossi DX808 Servo DriveContact Us
🚑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.