Denon 943639106250s Smps Pcb Assembly AVR-S770H

Product Description

The DENON 943639106250s is a switched-mode power supply (SMPS) printed circuit board assembly designed as an OEM replacement component for select Denon AV receivers. The SMPS PCB serves as the internal power regulation stage, converting AC mains input into the regulated DC voltages required by the receiver's amplifier and processing circuits. This is an OEM-sourced assembly intended for electronics repair technicians and qualified service professionals performing board-level component replacement on compatible Denon units.

This SMPS PCB assembly is a direct-fit replacement for use in Denon AV receivers, specifically referenced for the AVR-S770H and AVR-X1800H model lines. It is typically installed during depot-level or bench repair when the power supply stage has failed, resulting in symptoms such as no power, intermittent startup, or voltage rail faults. Installation requires disassembly of the receiver chassis and careful handling of mains-connected circuitry.

Key Features

• OEM Denon replacement SMPS PCB assembly for accurate form, fit, and function match
• Designed for the AVR-S770H and AVR-X1800H AV receiver platforms
• Provides regulated DC power to amplifier and DSP processing circuits
• Direct board-level swap reduces repair time compared to component-level rework

Compatibility

Referenced for use with the Denon AVR-S770H and AVR-X1800H AV receivers as indicated by the OEM part description.

Installation Notes

Installation should be performed by a qualified electronics service technician with experience in AV receiver repair. Always disconnect the unit from mains power and allow capacitors to fully discharge before handling internal assemblies. The SMPS board operates at potentially lethal mains voltages; appropriate safety precautions and insulating tools must be used. Follow Denon service documentation for proper connector routing and board mounting procedures.

Technical Specifications

• Assembly Type: SMPS PCB Assembly
• Compatible Models: AVR-S770H, AVR-X1800H

Standard Information

• Brand: DENON
• Manufacturer Part Number: 943639106250s