Genuine Brother MFC-J6710DW NCU Fax Board - B57U077-1 - TESTED For Sale
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Restore your Fax functionality: 100% Tested Genuine Brother NCU Board.
Is your Brother printer failing to detect the phone line, or are you getting communication errors only when faxing? This is the Original Brother NCU (Network Control Unit) Board, part number B57U077-1, pulled from a functional Brother MFC-J6710DW.
Why buy this Board from Tech Parts?
Dual Port Integrity: We have physically inspected both RJ-11 ports to ensure the copper pins are straight and free of corrosion.
Tested Communication: Verified to successfully dial out and handshake with other fax machines.
Surge Protection Intact: This original OEM board includes the factory-spec capacitors and protectors that often blow during electrical storms.
Genuine OEM Fit: This is the exact board for the J6710DW series, ensuring the mounting screw holes and ribbon cable connector align perfectly.
Cleaned & Inspected: No signs of overheating or burnt traces. Ready for a quick swap.
Common Problems Fixed:
"No Dial Tone" Errors: When the printer is connected but doesn't "hear" the line.
