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The JRC CBD-1682 is a power supply printed circuit board (PCB) designed for use in the JRC JMA-9122 series marine radar systems. It is installed inside the radar unit and is responsible for converting the vessel’s incoming AC power into regulated DC voltages required by the radar’s internal electronic circuits.
This board distributes stable power to key radar modules such as the transmitter, receiver, signal processing, and control sections. It typically includes built-in protection features such as over-voltage, over-current, and thermal protection to ensure safe and reliable operation in marine environments.
The CBD-1682A is an internal power supply circuit board specifically designed for use within the scanner unit of the JRC JMA-9122 series marine radar systems. It is sometimes referenced by its internal part code 7PCRD1808A.
Acts as the primary DC power supply for the radar’s scanner electronics, converting and regulating the incoming power to the required internal voltage rails used by the transmitter, receiver, T/R control circuitry, and other scanner subsystems.
Ensures stable, regulated DC power under varying shipboard electrical conditions to maintain reliable radar performance.
⚡ Important: Detailed output voltages and current ratings are not published in public JRC documents, as these are proprietary and intended for service technicians. However, based on its role:
Operates from the radar’s internal power input (AC or DC dependent on system configuration) and provides several regulated DC outputs to scanner electronics modules.
Supplies high-voltage DC levels necessary for the transmitter/receiver and modulator sections (as implicated by service manuals mentioning high-voltage rails being checked via this board).
Mounted directly inside the scanner unit and interconnected via multi-pin harnesses to other scanner boards.
Interfaces with other subassemblies including the modulation circuit (CPA-264), T/R control (CMC-1205R), and scanner motor power circuits.
Designed with built-in protection features such as over-current and thermal safeguards typical of marine electronics boards, minimizing risk of damage in over-load conditions.
Part of a ruggedized system intended for continuous operation in harsh maritime environments (salt spray, vibration, temperature variation).
Approximate weight: 575 g (0.575 kg) for the PCB board itself.
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