Figure 5-26. Fusing ............................................................................................................166
Figure 5-27. ETB cleaning .................................................................................................169
Figure 5-28. Drum cleaning ...............................................................................................170
Figure 5-29. Primary charging roller and toner charging roller cleaning ...........................171
Figure 5-30. Color registration calibration .........................................................................172
Figure 5-31. Image density detection ................................................................................174
Figure 5-32. Custom/Standard paper size switch in cassette ...........................................175
Figure 5-33. Pickup/feed system .......................................................................................176
Figure 5-34. Pickup/feed system .......................................................................................177
Figure 5-35. Cassette pickup operation ............................................................................179
Figure 5-36. Paper size detection switches .......................................................................180
Figure 5-37. Paper lifting operation ...................................................................................181
Figure 5-38. Multiple-feed prevention ................................................................................182
Figure 5-39. Overhead transparency detection .................................................................183
Figure 5-40. Horizontal registration adjustment ................................................................184
Figure 5-41. Duplex switch back .......................................................................................186
Figure 5-42. Additional 500-sheet paper feeder ................................................................187
Figure 5-43. 500-sheet paper feeder pickup and feed operation ......................................188
Figure 6-1. Phillips and Posidriv screwdriver comparison ...............................................192
Figure 6-2. ETB supports and pressure gears ................................................................195
Figure 6-3. Removing and replacing the rear cover ........................................................196
Figure 6-4. Removing and replacing the top cover .........................................................197
Figure 6-5. Removing and replacing the rear top cover ..................................................198
Figure 6-6. Removing and replacing the left cover (1 of 2) .............................................199
Figure 6-7. Removing and replacing the left cover (2 of 2) .............................................199
Figure 6-8. Removing and replacing the right cover .......................................................200
Figure 6-9. Removing and replacing the multi-purpose tray ...........................................201
Figure 6-10. Removing and replacing the front cover .......................................................202
Figure 6-11. Removing and replacing the control panel (1 of 2) .......................................203
Figure 6-12. Removing and replacing the control panel (2 of 2) .......................................203
Figure 6-13. Control panel overlay for 5500 models only .................................................204
Figure 6-14. Control panel with label for 5550 models only ..............................................204
Figure 6-15. Removing and replacing the cassette cover .................................................204
Figure 6-16. Removing and replacing the paper pickup unit (1 of 2) ................................205
Figure 6-17. Removing and replacing the paper pickup unit (2 of 2) ................................205
Figure 6-18. Removing and replacing the paper pickup sensor PCB ...............................206
Figure 6-19. Removing and replacing the multi-purpose tray sensor PCB .......................207
Figure 6-20. Removing and replacing the paper pickup drive unit (1 of 2) .......................208
Figure 6-21. Removing and replacing the paper pickup drive unit (2 of 2) .......................208
Figure 6-22. Removing and replacing the lifter drive unit (1 of 3) .....................................209
Figure 6-23. Removing and replacing the lifter drive unit (2 of 3) .....................................209
Figure 6-24. Removing and replacing the lifter drive unit (3 of 3) .....................................210
Figure 6-25. Removing the cassette pickup and feed rollers ............................................211
Figure 6-26. Removing and replacing the solenoid and clutch .........................................212
Figure 6-27. Removing and replacing the cassette separation roller ................................212
Figure 6-28. Removing and replacing the multi-purpose tray pickup roller (1 of 2) ..........213
Figure 6-29. Removing and replacing the multi-purpose tray pickup roller (2 of 2) ..........213
Figure 6-30. Removing and replacing the multi-purpose tray separation pad ..................214
Figure 6-31. Removing and replacing the color registration detection unit .......................215
Figure 6-32. Removing and replacing the DC controller shield ........................................216
Figure 6-33. Environment sensor ......................................................................................217
Figure 6-34. Removing and replacing the memory tag antenna PCBs (1 of 2) ................218
Figure 6-35. Removing and replacing the memory tag antenna PCBs (2 of 2) ................218
Figure 6-36. Removing and replacing the developing disengaging drive unit ..................219
Figure 6-37. Removing and replacing the drum drive gears (1 of 2) ................................220
Figure 6-38. Removing and replacing the drum drive gears (2 of 2) ................................220
xvi ENWW
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