HP LaserJet Enterprise M607n - Page 9

Table of contents
1 Theory of operation ....................................................................................................................................... 1
Related documentation and software ................................................................................................................... 2
Basic operation ...................................................................................................................................................... 3
Sequence of operation ........................................................................................................................ 4
Engine-control system .......................................................................................................................................... 5
DC controller ........................................................................................................................................ 6
Motors ............................................................................................................................... 7
Fans ................................................................................................................................... 8
Solenoids ........................................................................................................................... 8
Clutches ............................................................................................................................. 8
Switches ............................................................................................................................ 8
Photointerrupter sensors ............................................................................................... 10
Sensors ........................................................................................................................... 10
LEDs ................................................................................................................................. 10
Low-voltage power supply ................................................................................................................ 11
Low-voltage power supply voltages description ........................................................... 12
Over-current/over-voltage protection ........................................................................... 12
Safety .............................................................................................................................. 12
Low-voltage power supply functions ............................................................................. 13
High-voltage power supply ............................................................................................................... 13
High-voltage power supply circuits ................................................................................ 13
Fuser control ..................................................................................................................................... 14
Fuser circuits ................................................................................................................... 15
Fuser control functions ................................................................................................... 16
Fuser heater protection .................................................................................................. 18
Laser scanner system .......................................................................................................................................... 19
Laser/scanner failure detection ........................................................................................................ 20
Safety ................................................................................................................................................ 20
Image formation system ..................................................................................................................................... 21
Image-formation process ................................................................................................................. 24
Step 1: Pre-exposure ...................................................................................................... 24
Step 2: Primary charging ................................................................................................ 25
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