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  1. #1
    Trusted Tech 50+ Posts suomi's Avatar
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    brother mfc-l8690cdw 0B

    What is code 0B.

  2. #2
    Service Manager 2,500+ Posts tsbservice's Avatar
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    Re: brother mfc-l8690cdw 0B

    Hi suomi,
    Basically
    high-voltage power supply PCB ASSY problem. Steps to troubleshooting:

    Error code 0B01
    An error occurred in the high-voltage power supply PCB ASSY while operating.


    Error code 0B02
    An error occurred in the high-voltage power supply PCB ASSY when the machine was in the
    ready state.


    <User Check>
    Slide the green tab of the drum unit to left and right for two to three times to clean the corona
    wire for all the four colors.
    There is a possibility of condensation. Turn the power switch OFF and ON, then open the
    front cover and the back cover and leave the machine more than 30 minutes.
    Replace the drum unit.
    Step Cause Remedy
    1 Connection failure of the power
    fan harness
    Reconnect the power fan harness.
    2
    Connection failure of the highvoltage
    power supply PCB
    harness
    Reconnect the high-voltage power supply
    PCB harness.
    3 Power fan failure Replace the power fan.
    4 High-voltage power supply PCB
    failure
    Replace the high-voltage power supply
    PCB ASSY.
    5 Main PCB failure Replace the main PCB ASSY.
    Step Cause Remedy
    1
    Dirt on the machine, the drum
    unit, the belt unit and the waste
    toner box terminal.
    Clean the machine, the drum unit, the belt
    unit and the waste toner box terminal.
    (Refer to Fig. 2-13 (P2-71), Fig. 2-14 (P2-
    71), Fig. 2-19 (P2-128) and Fig. 2-20 (P2-
    133).)
    2 Connection failure of the highvoltage
    power supply flat cable
    Reconnect the high-voltage power supply
    flat cable.
    3
    Connection failure of the highvoltage
    power supply PCB
    harness
    Reconnect the high-voltage power supply
    PCB harness.
    4 High-voltage power supply PCB
    failure
    Replace the high-voltage power supply
    PCB ASSY.
    5 Main PCB failure Replace the main PCB ASSY
    A tree is known by its fruit, a man by his deeds. A good deed is never lost, he who sows courtesy, reaps friendship, and he who plants kindness gathers love.

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