Curtis Instruments 1237-4104 dc motor controller
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The Curtis Instruments 1237‑4104 is a permanent‑magnet DC motor speed controller rated at 48 V and up to 100 A with a 0–5 V analog input. Common failure points for this model include degraded MOSFETs or IGBT power stages, over‑temperature shutdown of the microprocessor, and worn gate driver circuits that can cause erratic speed control or loss of motor reversal capability. First‑check diagnostics: verify the supply voltage and current limits at the controller terminals; inspect the heat sink and cooling fan for proper operation and adequate airflow; review any fault codes or status LEDs displayed on the front panel to identify power stage or thermal faults.[oss-gpt-20b] |
Need your Curtis Instruments 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
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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.