CHAPTER 3 THEORY OF OPERATION
3-26
2.3
Sensors
2.3.1 Cover sensors A and B
Detect opening and closing of the front cover.
Fig. 3-32
2.3.2
Toner sensor
Detects if there is toner in the toner cartridge. The toner sensor at the left side emits light
through the window on the left side of the toner cartridge, then the toner sensor at the right
side receives it when the toner is low. They also detect whether or not the drum unit is
installed. (The toner cartridge is installed in the drum unit.)
Fig. 3-33
Toner sensor
(light emission)
Toner sensor
(light reception)
Cover sensor (A)
Cover sensor (B)
Содержание HL-1470N
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Страница 59: ...CHAPTER 3 THEORY OF OPERATION 3 9 Fig 3 8 ...
Страница 61: ...CHAPTER 3 THEORY OF OPERATION 3 11 Two 32 Mbits ROMs x 16 bit are fitted Fig 3 11 HL 1470N ...
Страница 63: ...CHAPTER 3 THEORY OF OPERATION 3 13 Two 16M bit DRAMs x 16 bits are used as the RAM Fig 3 14 HL 1450 1470N ...
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Страница 220: ...Appendix 12 Main PCB Circuit Diagram HL 1230 1440 1 3 CODE LJ8812001 B512130 CIR 1 3 A XX NAME ...
Страница 221: ...Appendix 13 Main PCB Circuit Diagram HL 1230 1440 2 3 CODE LJ8812001 B512130 CIR 2 3 A XX NAME ...
Страница 222: ...Appendix 14 Main PCB Circuit Diagram HL 1230 1440 3 3 CODE LJ8812001 B512130 CIR 3 3 A XX NAME ...
Страница 223: ...Appendix 15 Engine PCB Circuit Diagram CODE LJ88009001 B512136 CIR A XX NAME ...
Страница 224: ...Appendix 16 Network Board Circuit Diagram HL 1470N CODE LJ8107000 B512058CIR A 29 NAME ...
Страница 227: ...CODE NAME Appendix 19 High voltage Power Supply PCB Circuit Diagram ZLe MPH3212 ...
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Страница 248: ...12 ACCESSORIES MODEL HL 1230 1440 1450 14700N 84U Z31 Z32 Z33 Z34 920 18 2 3 4 1 ...