HP 4550 Service Manual - Page 9

List of Figures Figure 1-1 HP Color LaserJet 4500 family printers 14 Figure 1-2 HP Color LaserJet 4550 series printers 15 Figure 1-3 Model and Serial number information 18 Figure 1-4 Sample label 19 Figure 1-5 Space requirements 21 Figure 1-6 Front view, HP Color LaserJet 4500 and HP Color LaserJet 4550 (shown with 500-sheet paper feeder and duplex unit 25 Figure 1-7 Rear view, HP Color LaserJet 4500 (shown with 500-sheet paper feeder and duplex unit) . . . . .26 Figure 1-8 Rear view, HP Color LaserJet 4550 (shown with 500-sheet paper feeder and duplex unit) . . . . .27 Figure 3-1 Package contents 48 Figure 3-2 Parallel cable with a "C" connector 58 Figure 4-1 Imaging drum life 81 Figure 4-2 OPC life 82 Figure 4-3 Location of consumables 84 Figure 4-4 Removing the formatter board 98 Figure 4-5 Do not remove the DIMM in slot #4 99 Figure 4-6 Do not remove the DIMM in slot #3 99 Figure 4-7 EDO and SDRAM memory modules 99 Figure 5-1 Basic system operation 103 Figure 5-2 Image formation 104 Figure 5-3 Primary charge 105 Figure 5-4 Laser exposure 106 Figure 5-5 Development 106 Figure 5-6 Primary transfer 107 Figure 5-7 Secondary transfer 108 Figure 5-8 Separation 108 Figure 5-9 ITB residual toner cleaning 109 Figure 5-10 Waste toner to waste toner reservoir 109 Figure 5-11 Fuser 110 Figure 5-12 Toner density sensor 111 Figure 5-13 Photosensitive drum cartridge 112 Figure 5-14 Waste toner 113 Figure 5-15 Transfer unit function 113 Figure 5-16 Home position detection 114 Figure 5-17 ITB unit life detection 115 Figure 5-18 Secondary transfer roller unit 116 Figure 5-19 ITB unit contact/separation unit 117 Figure 5-20 Toner carousel assembly 118 Figure 5-21 Toner carousel operation 119 Figure 5-22 Toner cartridge contact/separation function 119 Figure 5-23 Toner level detection/toner cartridge detection 120 Figure 5-24 Laser/scanner operation 121 Figure 5-25 Paper jam sensors (shown with the optional 500-sheet paper feeder and duplex unit installed 122 Figure 5-26 Tray 2 (cassette) operation 123 Figure 5-27 Tray 1 manual feed 124 Figure 5-28 Laser paper detected 125 Figure 5-29 Overhead transparency sensor 125 Figure 5-30 Pick-up and feed system 126 Figure 5-31 Fusing and delivery unit 127 Figure 5-32 Reversing and duplex pick-up operation 128 Figure 5-33 Reversing operation 129 Contents vii