Komatsu 7835-16-2001 Controller Repair Service

Professional diagnostic and board-level repair service for this Komatsu 7835-16-2001 Controller.

Komatsu 7835‑16‑2001 is an electronic control unit (ECU) used in the PC300‑7/PC300LC‑7 series of excavators to manage hydraulic and engine functions. Common failure modes for this class of controller include power supply degradation, capacitor failure on the board, shorted I/O lines, and firmware corruption that can trigger “ECU fault” or “over‑temperature” error codes. Begin diagnostics by verifying the 24 V DC input voltage and checking for any blown fuses or tripped breakers; inspect the board for burn marks, cracked solder joints, or swollen electrolytic capacitors; then review the diagnostic log for specific fault codes (e.g., 0xA3, 0xB4) that indicate I/O channel failures or communication errors with the hydraulic module. Post Comment

Need your Komatsu 7835-16-2001 Controller repaired?

Ship your unit to our North Carolina repair shop for component-level diagnostics and a repair estimate. We service industrial control electronics and power systems nationwide.

• ⚙️ Board-level diagnostics – Troubleshooting beyond simple module replacement
• 🔁 Clear approval process – No repair begins without your approval
• 🧰 Expert Technicians – Decades of board-level experience
• ✅ 1-Year Warranty – Included with completed repairs

Start a Repair Request   Call 1-336-969-0110

Nationwide service • Industrial-grade testing • 1-year warranty on completed repairs

Owner-Operated • Practical Pricing • 1-Year Warranty • Nationwide Service

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