Engine Error Ignore Mode - Brother HL-2290 Service Manual

1.4.4 Engine error ignore mode

When an engine error occurs and the machine cannot be recovered unless the main PCB is
replaced, using this function enables the machine to start, ignoring the engine error, to
retrieve the EEPROM data.
<Operating Procedure>
(1) Check that the front cover is closed. Press and hold the [Go], and turn ON the power
switch. The Toner, Drum, and Paper LEDs light.
(2) Release the [Go]. All LEDs go out.
(3) Press the [Go] 12 times. Engine error ignore mode is set.
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