HP LaserJet Pro Color MFP M476dw - Page 8

Fuser failure detection ................................................................................. 13
High-voltage power supply ............................................................................................ 14
Laser/scanner system ......................................................................................................................................... 15
Laser failure detection ...................................................................................................................... 15
Image-formation system .................................................................................................................................... 16
Image-formation process ................................................................................................................. 16
Overview ......................................................................................................................... 16
Latent-image formation stage ....................................................................................... 17
Step 1: primary charging .............................................................................. 17
Step 2: laser-beam exposure ....................................................................... 18
Developing stage ............................................................................................................ 18
Step 3: development .................................................................................... 18
Transfer stage ................................................................................................................. 19
Step 4: primary transfer ............................................................................... 19
Step 5: secondary transfer ........................................................................... 19
Step 6: separation from the drum ............................................................... 20
Fusing stage .................................................................................................................... 20
Step 7: fusing ................................................................................................ 20
ITB cleaning stage ........................................................................................................... 21
Step 8: ITB cleaning ...................................................................................... 21
Drum cleaning stage ....................................................................................................... 22
Step 9: drum cleaning .................................................................................. 22
Developing roller engagement/disengagement control ............................ 22
Pickup-and-feed system ..................................................................................................................................... 23
Jam detection .................................................................................................................................... 25
Pad transfer ....................................................................................................................................... 25
Multiple-feed prevention .................................................................................................................. 26
Scanning and image capture system .................................................................................................................. 27
Scanner power-on sequence of events ............................................................................................ 27
Copy or scan sequence of events ...................................................................................................... 28
Scanner operation ............................................................................................................................. 28
ADF operation ...................................................................................................................................................... 30
ADF duplex operation ........................................................................................................................ 30
ADF paper path and ADF sensors ...................................................................................................... 30
ADF jam detection ............................................................................................................................. 31
ADF jam clearance ............................................................................................................................. 32
Fax functions and operation ............................................................................................................................... 33
Computer and network security features ........................................................................................ 33
PSTN operation ................................................................................................................................. 33
Receive faxes when you hear fax tones ........................................................................................... 33
Distinctive ring function .................................................................................................................... 34
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