Sony ULT Wear WH-ULT900N Main Control Board OEM Replacement Parts

This is the original OEM main control board for the Sony ULT Wear WH-ULT900N headphones. The central processing board that handles Bluetooth connectivity, ANC, audio processing, and all core headphone functions. A direct replacement for a failed or damaged main board.

• Brand: Sony (OEM Original)
• Condition: Grade A - Excellent
• Fits Models: Sony ULT Wear WH-ULT900N

Key Features:

• Genuine OEM pulled part, tested and fully functional
• Board number 400410-052118, Sony marked PCB
• Handles Bluetooth, ANC, audio processing, and all core headphone functions
• Multiple FPC connectors for speaker, microphone, and peripheral board connections
• Fixes total power failure, Bluetooth issues, ANC failure, and audio dropouts
• Direct fit for WH-ULT900N with original mounting points

What's Included:

• 1x OEM Sony WH-ULT900N main control board (400410-052118)

This repair requires full headphone disassembly and soldering to reconnect all FPC cables and wiring harnesses to the board. This is an advanced repair recommended for experienced technicians only.

If you prefer not to repair it yourself, we also offer a mail-in repair service:
https://www.joesge.com/pages/repair-service-sony-headphones