Brother HL-6050 Service Manual page 294

CHAPTER 7 SERVICE SUPPORT SOFTWARE
(8) Turn the printer on. The printer automatically moves to the rewriting mode and starts
rewriting.
While rewriting the firmware, LCD blacks out and "DATA LED" blinks. Be sure NOT to
take out the CompactFlash card, or turn the printer off until it reaches to the condition of
step (9). Rewriting may be impossible once the writing procedure fails.
(9) When rewriting finishes, [....Complete....] appears on LCD. Turn OFF the printer, then
take out the CompactFlash from the printer.
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