Brother 1240 Service Manual page 178

CHAPTER 6 TROUBLESHOOTING
(8) Close the front cover.
(9) Continue to press the control panel button.
Check that the Data LED stays OFF.
(10) Release the panel button.
(11) If all the sensors except the toner sensor are correct, the printer goes back to the Ready
status.
If any error is detected, the printer stays in the inspection mode.
NOTE:
If the printer goes back to the Ready status after the toner sensor does not detect the drum
unit, the printer starts to recognize the main motor.
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