HP 4550 Service Manual - Page 376

replacing air filters 91 consumables 83, 85 fuser 92 fuser kit 92 gears 193 imaging drum 88 ITB 90 paper rollers 94 parts 139 toner cartridges 86 transfer kits 89 reservoir, waste toner 109 Resets Menu 282 resetting printer 97 retaining ring screws 141 reversed paper sensor (PS3101) 122, 129 reversing motor (M3102) 129 reversing operations, duplex unit 129 RFI (Radio Frequency Interference) shield, removing 156 RGB, Standard (sRGB) 246 right rear cover, removing 148 right rear fan, diagram 316 right side assemblies, removing 168 right side cover, removing 146 right side fan, removing 195 RISC processor 68 RJ-45 ports 66 rollers cleaning methods 78 cleaning roller 114 feed 122 fusing delivery 127 last paper detection 125 pick-up 124 primary charge 105 primary transfer 107 registration 123 removing 205, 207 replacing 89, 94 secondary transfer 107, 115 transfer 114 ruler, repetitive defects 266 S safety information 37 scanner assembly, removing 157 operations 120 protective cover 139 scatter, background 254 Screen Match 246 screwdrivers 140 screws, types of 141 SDRAM DIMMs adding 98 supported 16 sealing tape, removing 52 secondary transfer process 107 secondary transfer roller operations 115 paper path 122 secondary transfer roller clutch (CL4) operations 114, 115 removing 192 security page 286 security, network 73, 74 selecting media 28 self tapping screws 141 374 Index sensors diagrams 308, 311, 314 paper jam 122, 237 PS1 (ITB unit life) 114 PS10 (carousel position) 118, 119 PS11 (toner cartridge contact/separation) 118, 119 PS12 (toner level) 118, 119 PS13 (waste toner) 113, 313 PS14 (toner density) 85, 111 PS2 (registration paper) 122, 123, 131 PS3 (last paper) 124, 125, 312 PS3001 (paper feeder paper detection) 126 PS301 (overhead transparency) 125 PS3101 (reversed paper) 122, 129 PS3103 (duplex pick-up) 122, 130 PS3104 (duplex pick-up paper) 122, 129 PS3105 (side registration home position) 130 PS4 (multipurpose tray) 124, 312 PS5 (home position detection) 114, 223 PS6 (fusing unit pressure release) 127, 312 PS7 (delivery paper) 122, 127, 312 PS8 (cassette paper) 123 PS9 (face-down bin paper full) 127, 224 testing 303, 304 separation pad cleaning 78 operations 124 separation process 108 separation rollers cleaning 78 locating 84 serial numbers locating 18, 140 setting 296 server, embedded Web 285 service approach 40 service mode 293 settings color 244, 246 color balance 250 Configuration Menu 276 halftone 245 interface 280 locking 73 margins 298 network security 74 paper trays 274 PowerSave 63 print jobs 278 printer drivers 69 registration values 297 restoring defaults 282 shafts, removing cam 208 roller 205 sharkskin, troubleshooting 260 sharpness, settings 245 sheet-metal parts, handling 139 shipping printer 54 shutting down printer 139 side registration adjustment 130 side registration home position sensor (PS3105) 130 side registration motor (M3103) 129, 130 Simple Network Management Protocol (SNMP) 67 site requirements 20, 21 skewed images 257 slots EIO 26 memory 16, 98 C7085-90921