HP LaserJet Pro 500 - Page 8

Fuser (fixing) temperature-control circuit ...................................................... 20
Fuser (fixing) over-temperature protection .................................................... 20
Fuser (fixing)-failure detection .................................................................... 21
Laser/scanner system ............................................................................................................. 23
Image formation system .......................................................................................................... 25
Image formation process .......................................................................................... 26
Step 1: Pre-exposure ................................................................................. 27
Step 2: Primary charging .......................................................................... 27
Step 3: Laser-beam exposure ..................................................................... 28
Step 4: Development ................................................................................ 28
Step 5: Primary transfer ............................................................................ 29
Step 6: Secondary transfer ........................................................................ 29
Step 7: Separation ................................................................................... 30
Step 8: Fusing ......................................................................................... 30
Step 9: ITB cleaning ................................................................................. 31
Step 10: Drum cleaning ............................................................................ 31
Toner cartridge ....................................................................................................... 31
Developing roller engagement and disengagement ..................................................... 33
Intermediate transfer belt (ITB) unit ............................................................................. 35
Primary-transfer-roller engagement and disengagement ................................. 36
ITB cleaning ............................................................................................ 38
Calibration ............................................................................................................. 39
Color misregistration control ...................................................................... 39
Image stabilization control ........................................................................ 40
Pickup, feed, and delivery system ............................................................................................. 41
Pickup-and-feed unit ................................................................................................ 44
Tray pickup ............................................................................................. 45
Tray-presence detection .............................................................. 46
Tray lift operation ...................................................................... 46
paper-presence detection ........................................................... 48
Multifeed prevention .................................................................. 48
Multipurpose tray pickup ........................................................................... 49
Paper feed .............................................................................................. 50
Skew-feed prevention ................................................................. 51
OHT detection .......................................................................... 51
Fusing and delivery unit ........................................................................................... 52
Loop control ............................................................................................ 52
Pressure-roller pressurization control ........................................................... 54
Duplexing unit ........................................................................................................ 55
Duplexing reverse and feed control ............................................................ 56
Duplex pickup operation ........................................................................... 56
vi ENWW
draft version