HP LaserJet CP3525 - Page 5

Low-voltage power supply failure .................................................................... 114
Fuser (fixing) control ........................................................................................................ 115
Fuser (fixing) temperature-control circuit ........................................................ 116
Fuser (fixing) over-temperature protection ...................................................... 116
Fuser (fixing)-failure detection ......................................................................... 117
Laser/scanner system ...................................................................................................................... 119
Image-formation system ................................................................................................................... 121
Image-formation process ................................................................................................. 122
Step 1: Pre-exposure ...................................................................................... 123
Step 2: Primary charging ................................................................................. 123
Step 3: Laser-beam exposure ......................................................................... 124
Step 4: Development ....................................................................................... 124
Step 5: Primary transfer .................................................................................. 124
Step 6: Secondary transfer ............................................................................. 125
Step 7: Separation .......................................................................................... 126
Step 8: Fusing ................................................................................................. 126
Step 9: ITB cleaning ........................................................................................ 127
Step 10: Drum cleaning ................................................................................... 127
Print cartridge .................................................................................................................. 127
Developing-roller engagement and disengagement ........................................................ 129
Intermediate transfer belt (ITB) unit ................................................................................. 130
Primary-transfer-roller engagement and disengagement ................................ 131
ITB cleaning .................................................................................................... 132
Calibration ........................................................................................................................ 133
Color-misregistration control ........................................................................... 134
Image-stabilization control .............................................................................. 135
Pickup, feed, and delivery system .................................................................................................... 136
Pickup-and-feed unit ........................................................................................................ 139
Cassette pickup ............................................................................................... 139
Cassette-presence detection .......................................................... 141
Cassette lift operation ..................................................................... 141
Cassette paper-presence detection ................................................ 142
Multifeed prevention ....................................................................... 143
Multipurpose tray pickup ................................................................................. 144
Paper feed ....................................................................................................... 145
Skew-feed prevention ..................................................................... 146
OHT detection ................................................................................ 146
Fusing and delivery unit ................................................................................................... 147
Loop control .................................................................................................... 147
Pressure-roller pressurization control ............................................................. 148
Duplexing unit (HP Color LaserJet CP3525dn and HP Color LaserJet CP3525x
only) ................................................................................................................................. 150
Duplexing reverse and feed control ................................................................ 151
Duplex pickup operation .................................................................................. 151
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