FURUNO AC DC Power Supply Unit PR850A – Service, Repair & Supply
Marine electronics demand stable and reliable power, especially during critical navigation operations. The FURUNO AC DC Power Supply Unit PR850A plays a key role in providing consistent voltage to essential onboard systems. At SEANAV, we specialize in supplying, servicing, and repairing FURUNO PR850A units to ensure uninterrupted maritime performance.
What is the FURUNO PR850A Power Supply Unit?
The PR850A is a high-performance AC to DC power supply module designed for FURUNO navigation systems. It converts standard AC input into regulated DC output for radar systems, ECDIS, GPS, and other critical marine electronics. With robust construction and safety features, it withstands harsh maritime environments.

Our Services for FURUNO PR850A at SEANAV
Whether your power supply unit needs replacement, troubleshooting, or preventive servicing, SEANAV delivers fast and professional solutions. Our team understands the specifications and sensitivity of the PR850A and ensures full restoration and testing before deployment.
- New and refurbished PR850A units supply
- Onboard diagnostics and repair
- DC voltage regulation and calibration
- PCB board and fuse replacement
- Marine-grade insulation checks
- Heat dissipation and fan integrity tests
- Warranty-backed servicing and replacements
Why Choose SEANAV?
SEANAV is trusted across the maritime industry for its expertise in navigation electronics and onboard power systems. Our certified engineers deliver OEM-quality repairs and replacements for FURUNO power supply units with quick turnaround and high reliability. Whether at sea or in port, we keep your vessel powered and compliant.

11 Frequently Asked Questions
1. What does the FURUNO PR850A power?
The PR850A provides DC power to radar systems, GPS, ECDIS, and other marine electronics from FURUNO.
2. Can SEANAV repair a faulty PR850A?
Yes, we repair and test all critical functions including voltage output, circuit stability, and fan operations.
3. Do you supply brand-new PR850A units?
Yes, SEANAV offers genuine new and refurbished PR850A units depending on stock availability.
4. Is the PR850A GMDSS-compliant?
Yes, the unit meets marine safety and electrical standards for GMDSS and navigation electronics use.
5. What input and output does it support?
It typically accepts 100–240V AC input and outputs regulated 24V DC suitable for FURUNO systems.
6. Can I use PR850A with non-FURUNO equipment?
It is designed for FURUNO systems but can power compatible marine electronics with matching voltage specs.
7. What causes failure in PR850A units?
Common issues include capacitor failure, overheat, internal shorts, and input fuse damage due to power surges.
8. How often should the PR850A be serviced?
Annual checks are recommended for commercial vessels or if experiencing unstable power output.
9. Do you provide installation support?
Yes, SEANAV provides onboard installation and voltage calibration services for PR850A units.
10. Is there a warranty on repair?
Yes, we offer a 3 to 6-month warranty on repaired or replaced units depending on service level.
11. How to schedule a service with SEANAV?
Contact us via our website or hotline to schedule an inspection or service for your PR850A power unit.
Ensure power reliability with SEANAV’s expert FURUNO PR850A servicing. We keep your systems running, safely and efficiently.


