IV-2
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
ON (The top cover is closed.)
READY LED OFF
sensor
OFF (The top cover is open.)
READY LED ON
Toner
ON (The toner cartridge is installed.)
DATA LED OFF
sensor
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 to the printer while holding down the button. The DRUM LED
comes ON.
(3)
Release the button and immediately lightly press the button again.
(4)
Check if the DRUM (paper eject sensor) and ALARM (registration sensor) LEDs go
OFF after all the LEDs go ON.
If the paper eject sensor is ON at this point and the DRUM LED goes ON (error).
If the registration sensor is ON at this point and the ALARM LED goes ON (error).
(5)
Install the drum unit. Check that the DATA LED goes OFF.
(6)
Lightly touch the registration sensor actuator. Check that the ALARM LED comes
ON.
(7)
Close the top cover. Check that 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 ...