Brother International HL 760 Service Manual - Page 37

DRUM ALARM READY (PAPER) DATA (TONER) C) Paper eject sensor Registration sensor Cover sensor Toner sensor Switch Paper eject ON (Paper is detected.) sensor OFF (No paper is detected.) DRUM LED ON DRUM LED OFF Registration ON (Paper is detected.) sensor OFF (No paper is detected.) ALARM LED ON ALARM LED OFF Cover sensor ON (The top cover is closed.) OFF (The top cover is open.) READY LED OFF READY LED ON Toner sensor ON (The toner cartridge is installed.) DATA LED OFF OFF (No toner cartridge is installed.) DATA LED ON The procedure for the factory inspection mode is as follows. (1) Open the top cover and remove the drum unit. (2) Turn on the power of the printer while holding down the button. DRUM LED goes ON. (3) Lightly press the button again. (4) Check if DRUM (paper eject sensor) and ALARM (registration sensor) go OFF after all the LEDs go ON. If the paper eject sensor is ON at this point, DRUM LED goes ON (error). If the registration sensor is ON at this point, ALARM LED goes ON (error). (5) Install the drum unit. Check if the DATA LED goes OFF. (6) Lightly touch the registration sensor actuator. Check if the ALARM LED goes ON. (7) Close the top cover. Check if the READY LED goes OFF. (8) Press the button. (9) If all the sensors are correct, the printer goes back to the READY status. If any error is detected, the corresponding LED stays ON. IV - 2