HP Color LaserJet Enterprise CP5520 - Page 8

Latent-image formation block ..................................................................... 29
Pre-exposure ............................................................................. 29
Primary charging ...................................................................... 29
Laser beam exposure ................................................................. 30
Developing block ..................................................................................... 31
Transfer block .......................................................................................... 32
Primary transfer ......................................................................... 32
Secondary transfer .................................................................... 32
Separation ............................................................................... 33
Fusing block ............................................................................................ 33
ITB cleaning block .................................................................................... 34
Drum cleaning block ................................................................................. 34
Print cartridges ........................................................................................................ 35
Memory tag ............................................................................................ 36
Cartridge presence detection ..................................................................... 36
Toner level detection ................................................................................. 36
Cartridge life detection ............................................................................. 36
Developing unit engagement and disengagement control .............................. 36
ITB unit .................................................................................................................. 38
Primary transfer roller engagement and disengagement control ...................... 39
ITB unit presence detection ........................................................................ 40
ITB cleaning mechanism ............................................................................ 40
Calibration ............................................................................................................. 41
Color-misregistration control ...................................................................... 42
Environment change control ....................................................................... 43
Image stabilization control ........................................................................ 43
Image density control (DMAX) ..................................................... 43
Image halftone control (DHALF) ................................................... 43
Pickup, feed, and delivery system ............................................................................................. 44
Photo sensors .......................................................................................................... 46
Motors and solenoids .............................................................................................. 47
Pickup and feed block ............................................................................................. 47
Tray 2 cassette pickup .............................................................................. 48
Tray 2 cassette multiple-feed prevention ...................................................... 49
Tray 2 cassette media-size detection and Tray 2 cassette-presence detection . . . 50
Tray 2 cassette lift-up operation .................................................................. 51
Cassette media-presence detection ............................................................. 53
Tray 1 (MP tray) paper pickup .................................................................................. 53
Tray 1 (MP tray) last-paper detection ......................................................................... 54
Paper feed ............................................................................................................. 55
Skew-feed prevention ................................................................................ 57
vi ENWW