HP color LaserJet 2550 - Page 10

List of figures
Figure 1-1. HP color LaserJet 2550 series printer identification label .................................8
Figure 2-1. Space required ................................................................................................32
Figure 2-2. Standard and optional input trays—HP color LaserJet 2550 series
printers ............................................................................................................37
Figure 2-3. Printer output paths .........................................................................................38
Figure 3-1. Smearing..........................................................................................................61
Figure 3-2. Toner specks ...................................................................................................61
Figure 3-3. Loading the cleaning page in tray 1 ................................................................62
Figure 4-1. Cross-section of the printer .............................................................................68
Figure 4-2. Engine control system (includes the basic configuration of the printer) .........70
Figure 4-3. Power-on sequence ........................................................................................72
Figure 4-4. Motors and fans...............................................................................................73
Figure 4-5. Laser/scanner system .....................................................................................74
Figure 4-6. Pickup and feed system ..................................................................................76
Figure 4-7. Optional tray 2 (250-sheet paper tray) ............................................................77
Figure 4-8. Photosensors and switches (1 of 2) ................................................................78
Figure 4-9. Photosensors and switches (2 of 2).................................................................79
Figure 4-10. Solenoid ..........................................................................................................80
Figure 4-11. Clutches ..........................................................................................................81
Figure 4-12. Printed circuit assemblies (1 of 2) ...................................................................82
Figure 4-13. Printed circuit assemblies (2 of 2) ...................................................................83
Figure 4-14. Image-formation system ..................................................................................84
Figure 4-15. Image-formation process ................................................................................85
Figure 4-16. Step 1: primary charging .................................................................................86
Figure 4-17. Step 2: laser-beam exposure ..........................................................................86
Figure 4-18. Developing block .............................................................................................87
Figure 4-19. Step 3: developing ..........................................................................................87
Figure 4-20. Step 4: primary transfer ...................................................................................88
Figure 4-21. Step 5: secondary transfer ..............................................................................89
Figure 4-22. Step 6: separation ...........................................................................................89
Figure 4-23. Step 7: fusing ..................................................................................................90
Figure 4-24. Step 8: roller charging (auxiliary transfer belt cleaning roller) ........................90
Figure 4-25. Step 9: roller charging (transfer belt cleaning roller) .......................................91
Figure 4-26. Step 10: transfer belt cleaning ........................................................................92
Figure 4-27. Step 11: drum cleaning ...................................................................................93
Figure 4-28. Print cartridge ..................................................................................................94
Figure 4-29. Print-cartridge E-label .....................................................................................95
Figure 5-1. Removing the fuser cover (and fuser) ..........................................................105
Figure 5-2. Removing the right-side cover (1 of 2) ..........................................................106
Figure 5-3. Removing the right-side cover (2 of 2) ..........................................................107
Figure 5-4. Removing the control panel (1 of 2) ..............................................................108
Figure 5-5. Removing the control panel (2 of 2) ..............................................................109
Figure 5-6. Removing the on-off switch ...........................................................................110
Figure 5-7. Removing the interface cover .......................................................................111
Figure 5-8. Removing the formatter cage (1 of 2) ...........................................................112
Figure 5-9. Removing the formatter cage (2 of 2) ...........................................................113
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