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    válasz dgyuri0123 #100079 üzenetére

    Ez van a service manualban (A-S2100, ez a nagytesóé):

    Starting Self-Diagnostic Function in the protection cancel mode
    If the protection function works and causes hindrance
    to troubleshooting, cancel the protection function by the
    procedure below, and it will be possible to enter the self-
    diagnostic function mode.
    Turn the BALANCE knob unit, TREBLE knob unit and BASS
    knob unit clockwise fully and then while pressing down the
    AUDIO MUTE switch, set the “STANDBY/ON, OFF” (U, K, A,
    B, G, L, V, S models) / “ ” (Power) (T model) switch to the
    “ON” position and keep pressing down the AUDIO MUTE
    switch for 3 seconds or longer.
    The STANDBY/ON indicator lights up and the power supply
    relay (RY1 and RY2 on FUNCTION (1) P.C.B.) turns on.
    CAUTION!
    Using this unit with the protection function disabled may
    cause further damage to this unit. Use special care for
    this point when using this mode.
    When the protection function works due to an I protection
    L/Rch, it is not possible to start this unit with the protection
    function cancelled.

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