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JRC Marine Radar Power Supply Unit (PSU)
Japan Radio Co., Ltd. (JRC)
Refurbished
JRC Marine Radar Power Supply Unit (PSU) | Radar Power Supply Module | CBD-1661 H-7EPRD0029A, Repair, Spare Parts & Worldwide Supply | SM MARINE SERVICE™
The JRC Marine Radar Power Supply Unit (PSU) is one of the most critical assemblies inside a JRC marine radar system. It converts the ship's AC input power into multiple stable DC voltages required by the radar processor, display unit, scanner interface, communication boards, and other electronic modules.
The power supply shown in the images is identified as Model CBD-1661 with Part Number H-7EPRD0029A, a high-reliability marine switching power supply designed specifically for continuous shipboard operation.
Unlike a conventional industrial power supply, a marine radar PSU must withstand vibration, temperature changes, electrical noise, and fluctuating shipboard power while providing stable output around the clock.
SM MARINE SERVICE™ supplies new, used, and professionally reconditioned JRC Marine Radar Power Supply Units, including complete PSU assemblies, cooling fans, power modules, electronic repair services, replacement spare parts, and worldwide technical support.
| Item | Details |
|---|---|
| Manufacturer | Japan Radio Co., Ltd. (JRC) |
| Country of Origin | Japan |
| Product | Marine Radar Power Supply Unit |
| Model | CBD-1661 |
| Part Number | H-7EPRD0029A |
| Product Type | Switching Power Supply (SMPS) |
| Primary Function | AC to DC Power Conversion |
| Marine Application | JRC Marine Radar Systems |
The JRC Radar Power Supply Unit serves as the electrical heart of the radar display processor. Every electronic board inside the radar—including the Master Board, Video Board, Communication Board, Scanner Interface, and Display Controller—depends on stable power generated by this module.
The PSU converts shipboard AC input voltage into several regulated DC outputs used throughout the radar system. It also provides protection against over-voltage, over-current, short circuits, and overheating, ensuring safe and reliable operation even under demanding marine conditions.
Typical outputs generated by the PSU include regulated +5V, +12V, +24V, and other voltage rails required by different radar circuits, depending on the radar configuration.
The JRC Marine Radar Power Supply Unit operates as a high-efficiency switching mode power supply (SMPS).
Its operating sequence is as follows:
This design provides excellent efficiency, compact size, reduced heat generation, and reliable long-term operation in marine environments.
The JRC Marine Radar Power Supply Unit (Model CBD-1661 / H-7EPRD0029A) is a high-performance Switching Mode Power Supply (SMPS) specifically designed for marine navigation equipment. It provides multiple regulated DC outputs required for the reliable operation of the radar display, processor boards, scanner interface, and communication modules.
The AC input section receives shipboard electrical power and protects the system from electrical disturbances.
Functions include:
This stage converts incoming AC voltage into high-voltage DC before switching.
Its functions include:
The switching section uses high-frequency MOSFETs or power transistors to generate regulated output voltages efficiently.
Advantages include:
The transformer provides electrical isolation while converting voltage levels required by various radar circuits.
It supplies regulated power to:
The regulation circuitry continuously monitors output voltages and compensates for load changes.
Typical regulated outputs include:
The CBD-1661 Power Supply incorporates dual cooling fans to maintain safe operating temperatures.
These fans:
The built-in protection system safeguards the radar electronics against:
The multi-pin output harness distributes regulated DC power to all internal radar assemblies.
The connector assembly provides reliable electrical connections for:
Note: Actual specifications may vary depending on radar model and hardware revision.
| Specification | Details |
|---|---|
| Manufacturer | Japan Radio Co., Ltd. (JRC) |
| Model | CBD-1661 |
| Part Number | H-7EPRD0029A |
| Product Type | Switching Mode Power Supply (SMPS) |
| Input Voltage | Shipboard AC (100/110/200 VAC depending on selector configuration) |
| Cooling | Dual Cooling Fans |
| Output | Multiple Regulated DC Outputs |
| Protection | Over Voltage / Over Current / Short Circuit |
| Marine Application | JRC Marine Radar Systems |
The JRC Marine Radar Power Supply Unit is designed for professional marine navigation systems installed on various vessel types.
| Problem | Possible Cause | Recommended Solution |
|---|---|---|
| Radar will not power on | No AC input or blown fuse | Check input voltage, fuse, and terminal connections |
| Output voltage missing | Internal SMPS failure | Test output voltages and inspect switching circuitry |
| Cooling fan not operating | Fan failure or dust blockage | Clean or replace cooling fan |
| Random radar restart | Unstable DC output | Inspect capacitors and voltage regulation circuit |
| Overheating alarm | Fan malfunction or blocked airflow | Clean filters and verify fan operation |
| Low output voltage | Aged electrolytic capacitors | Replace defective capacitors |
| Power supply shuts down | Short circuit on output | Disconnect loads and isolate faulty module |
| Electrical noise | EMI filter deterioration | Inspect input filter and grounding system |
Professional testing using insulated power analyzers, oscilloscopes, and electronic load equipment is recommended after repair.
Routine preventive maintenance significantly increases PSU reliability.
The Power Supply Unit (PSU) is often referred to as the "heart" of the radar electronics because every internal circuit depends on stable DC power.
Its responsibilities include:
Without a healthy PSU, even a fully functional radar processor cannot operate.
It converts shipboard AC power into multiple regulated DC voltages required by the radar's processor boards, display electronics, communication modules, and scanner interface.
The CBD-1661 (H-7EPRD0029A) is used in selected JRC marine radar systems. Compatibility should always be confirmed using the radar model number and part number.
Frequently requested spare parts include:
Yes. Most failures involving capacitors, MOSFETs, rectifiers, cooling fans, transformers, connectors, and power regulation circuits can often be repaired by experienced marine electronics engineers.
Yes. We supply new, used, and professionally reconditioned JRC Marine Radar Power Supply Units, replacement cooling fans, spare parts, PCB repair services, and worldwide technical support.
The JRC Marine Radar Power Supply Unit (CBD-1661 / H-7EPRD0029A) is a high-efficiency marine-grade switching power supply designed to deliver stable regulated DC power to JRC marine radar systems. Featuring advanced protection circuits, dual cooling fans, and rugged Japanese construction, it ensures dependable radar performance in demanding marine environments.
For installation, troubleshooting, maintenance, voltage verification, and replacement procedures, always consult the official JRC Marine Radar Service Manual, Power Supply Manual, Installation Manual, Circuit Diagram, and Parts Catalogue corresponding to the specific radar model and power supply revision.
The JRC Marine Radar Power Supply Unit (CBD-1661 / H-7EPRD0029A) is a mission-critical component that provides clean, stable, and protected power for the entire radar system. Its robust marine-grade design, efficient switching technology, and integrated protection features make it an essential part of reliable marine navigation.
Whether your vessel requires a complete Power Supply Unit, cooling fan assembly, switching power module, electronic repair, or replacement spare parts, SM MARINE SERVICE™ provides professional marine electronics solutions with worldwide sourcing, repair, testing, and technical support.
SM MARINE SERVICE™ is a trusted global supplier of marine automation, navigation, radar, communication, GMDSS, VDR/S-VDR, engine room automation, hydraulic, fire & safety, and marine electronic equipment.
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Shanghai, China
Website: www.smmarineservice.com
Email: info@smmarineservice.com
WhatsApp: +8801818929292
Marketing Contact: Nazmul Hasan Bhuiyan
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