DRUM
ALARM
READY
(PAPER)
DATA
(TONER)
Paper eject sensor
Registration sensor
Cover sensor
Toner sensor
Switch
Paper eject
ON (Paper is detected.)
DRUM LED ON
sensor
OFF (No paper is detected.)
DRUM LED OFF
Registration
ON (Paper is detected.)
ALARM LED ON
sensor
OFF (No paper is detected.)
ALARM LED OFF
Cover sensor
ON (The top cover is closed.)
READY LED OFF
OFF (The top cover is open.)
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.
Содержание HL-720
Страница 1: ...SERVICE MANUAL MODEL HL 720 730 730Plus R LASER PRINTER ...
Страница 36: ...II 19 1 3 10 Engine I O HL 720 Fig 2 21 shows the engine interface circuit Fig 2 21 ...
Страница 37: ...II 20 HL 730 730Plus Fig 2 22 shows the engine interface circuit Fig 2 22 ...
Страница 61: ... Fig 3 18 2 4 1 1 1 ...
Страница 92: ...SERVICE MANUAL MODEL HL 760 R LASER PRINTER ...
Страница 109: ...II 8 1 3 4 DRAM Two 4M bit DRAMs x 16bits are used as the RAM Fig 2 6 ...
Страница 113: ...II 12 1 3 10 Engine I O Fig 2 12 shows the engine interface circuit Fig 2 12 ...
Страница 114: ...II 13 1 3 11 Paper Feed Motor Drive Circuit Fig 2 13 ...
Страница 133: ...Appendix 2 Main PCB Circuit Diagram 1 3 CODE UK3227000 B48K272CIR 1 3 NAME ...
Страница 134: ...Appendix 3 Main PCB Circuit Diagram 2 3 CODE UK3227000 B48K272CIR 2 3 NAME ...
Страница 135: ...CODE UK3227000 B48K272CIR 3 3 NAME Appendix 4 Main PCB Circuit Diagram 3 3 ...