Service Manual
Page 5
... Warranty 69 3 Operational overview Chapter contents 71 Verifying package contents 73 Verifying the cables are installed 74 Connecting the printer to the network 76 Changing the printer control panel overlay 79 Printer control panel layout 80 Menu maps 82 Selecting the display language 97 Installing the consumables 98 Configuring input trays 103 Verifying the printer is installed correctly 105 Verifying DIMM installation 106 Duplex registration (HP Color LaserJet 8550 107 Booklet printing 109 HP TonerGauge (HP Color LaserJet 8550 110...
... Warranty 69 3 Operational overview Chapter contents 71 Verifying package contents 73 Verifying the cables are installed 74 Connecting the printer to the network 76 Changing the printer control panel overlay 79 Printer control panel layout 80 Menu maps 82 Selecting the display language 97 Installing the consumables 98 Configuring input trays 103 Verifying the printer is installed correctly 105 Verifying DIMM installation 106 Duplex registration (HP Color LaserJet 8550 107 Booklet printing 109 HP TonerGauge (HP Color LaserJet 8550 110...
Service Manual
Page 63
... Phone (1) (800) 227-8164 (U.S. only) (49 7031) 14-2253 (805) 257-5565 (805) 257-6995 Fax EN Introduction 61 Once a faulty part is located, repair is sufficient to the HP Color LaserJet 8550 MFP printer. Introduction Repair normally begins with the use of printer internal diagnostics in conjunction with the troubleshooting procedures in chapter 8 of this printer. Replacement parts can be ordered from an authorized service or support provider...
... Phone (1) (800) 227-8164 (U.S. only) (49 7031) 14-2253 (805) 257-5565 (805) 257-6995 Fax EN Introduction 61 Once a faulty part is located, repair is sufficient to the HP Color LaserJet 8550 MFP printer. Introduction Repair normally begins with the use of printer internal diagnostics in conjunction with the troubleshooting procedures in chapter 8 of this printer. Replacement parts can be ordered from an authorized service or support provider...
Service Manual
Page 121
... (see page 368. Replacement frequencies for printer consumables Consumable Printer message Page count Approximate time period1 Black toner cartridge Color toner cartridges Cyan Magenta Yellow TONER LOW REPLACE BLACK TONER LOW REPLACE [color] 17,000 pages2 8,500 pages2 2.5 months 1.1 to work together in this printer. white only pages, or and-white only pages, 50,000 color pages or 8.3 months for color pages Fuser kit (220 Volt) Fuser Paper rollers (6) Hand wipe FUSER LIFE LOW REPLACE KIT 100,000 pages black-and- 16.7 months for black- For best print quality output, use HP...
... (see page 368. Replacement frequencies for printer consumables Consumable Printer message Page count Approximate time period1 Black toner cartridge Color toner cartridges Cyan Magenta Yellow TONER LOW REPLACE BLACK TONER LOW REPLACE [color] 17,000 pages2 8,500 pages2 2.5 months 1.1 to work together in this printer. white only pages, or and-white only pages, 50,000 color pages or 8.3 months for color pages Fuser kit (220 Volt) Fuser Paper rollers (6) Hand wipe FUSER LIFE LOW REPLACE KIT 100,000 pages black-and- 16.7 months for black- For best print quality output, use HP...
Service Manual
Page 381
.... Action: 1 Open the printer and remove media from is not installed. EN Printer message troubleshooting 379 See CLEAN DENSITY SENSOR CYCLE POWER in the printer control panel. 3 Turn the printer off and on to reset the printer. 56.2 ERROR CYCLE POWER Event log message: 56.00.02 Description: Indicates an illegal output error. The commands cannot be exchanged between the printer and its controller. See CLEAN DENSITY SENSOR CYCLE POWER in table 42 on page 389...
.... Action: 1 Open the printer and remove media from is not installed. EN Printer message troubleshooting 379 See CLEAN DENSITY SENSOR CYCLE POWER in the printer control panel. 3 Turn the printer off and on to reset the printer. 56.2 ERROR CYCLE POWER Event log message: 56.00.02 Description: Indicates an illegal output error. The commands cannot be exchanged between the printer and its controller. See CLEAN DENSITY SENSOR CYCLE POWER in table 42 on page 389...
Service Manual
Page 398
... will be stopped as soon as download to nonexistent directory). Action: 1 From the host computer, delete data from the printer hard disk using the printer drivers or a disk management application. 2 To clear all data from the printer hard disk, reformat the printer hard disk from the printer control panel. b Press ITEM until CONFIGURATION MENU appears on the display. Action: See the system administrator for information about the TONER LOW setting. Printing can continue. Action: Replace the printer hard disk...
... will be stopped as soon as download to nonexistent directory). Action: 1 From the host computer, delete data from the printer hard disk using the printer drivers or a disk management application. 2 To clear all data from the printer hard disk, reformat the printer hard disk from the printer control panel. b Press ITEM until CONFIGURATION MENU appears on the display. Action: See the system administrator for information about the TONER LOW setting. Printing can continue. Action: Replace the printer hard disk...
Service Manual
Page 407
... Event log message: None Description: The printer is in Power Save mode. Action: Clear this message by the printer. If the message still appears, turn the printer off and on the printer control panel through the Configuration Menu (see page 511. PJL OPERATIONS FAILED Event log message: None Description: The requested PJL operation could not be cleared if a print job is detected by pressing any key. Power Save settings can be completed because the option is full. EN Printer message troubleshooting 405...
... Event log message: None Description: The printer is in Power Save mode. Action: Clear this message by the printer. If the message still appears, turn the printer off and on the printer control panel through the Configuration Menu (see page 511. PJL OPERATIONS FAILED Event log message: None Description: The requested PJL operation could not be cleared if a print job is detected by pressing any key. Power Save settings can be completed because the option is full. EN Printer message troubleshooting 405...
Service Manual
Page 413
... degraded print quality; Replace the transfer kit and reset the transfer counter by pressing SELECT before attempting to print (or use the RESETS menu on the printer control panel). otherwise printing will signal the end of the TONER LOW setting on the printer to continue, printing can continue, the transfer kit should be replaced for tray 1 or remove the feed printing, and the job has been completed. EN Printer message troubleshooting 411 Unnumbered printer messages (continued) TOP OUTPUT BIN...
... degraded print quality; Replace the transfer kit and reset the transfer counter by pressing SELECT before attempting to print (or use the RESETS menu on the printer control panel). otherwise printing will signal the end of the TONER LOW setting on the printer to continue, printing can continue, the transfer kit should be replaced for tray 1 or remove the feed printing, and the job has been completed. EN Printer message troubleshooting 411 Unnumbered printer messages (continued) TOP OUTPUT BIN...
Service Manual
Page 418
... is used. 5 Paper tray configuration-lists the types and sizes of media configured for each of the four cartridges are also shown. 4 Memory-shows the total memory installed in the printer (including the printer hard disk) and the settings that affect how the memory is also a service information code for service personnel. 7 Event log-lists the last three printer events, including media jams, service errors, and other printer actions. 8 Color adjust-lists color adjustment halftone settings and the number of pages since the last manual color adjustment. 9 Duplex...
... is used. 5 Paper tray configuration-lists the types and sizes of media configured for each of the four cartridges are also shown. 4 Memory-shows the total memory installed in the printer (including the printer hard disk) and the settings that affect how the memory is also a service information code for service personnel. 7 Event log-lists the last three printer events, including media jams, service errors, and other printer actions. 8 Color adjust-lists color adjustment halftone settings and the number of pages since the last manual color adjustment. 9 Duplex...
Service Manual
Page 433
Performing a cold reset 1 Print a configuration page (see page 415) to troubleshooting 431 Once the power-on the printer control panel display. COLD RESET (in English) appears on the display for the following items: • page counts • fuser life count • transfer life count • multi-bin mailbox mode • display language Color adjust values revert to the factory defaults. User-accessible EIO values are reset to the factory defaults by a cold reset. None of the service mode variables such as the following...
Performing a cold reset 1 Print a configuration page (see page 415) to troubleshooting 431 Once the power-on the printer control panel display. COLD RESET (in English) appears on the display for the following items: • page counts • fuser life count • transfer life count • multi-bin mailbox mode • display language Color adjust values revert to the factory defaults. User-accessible EIO values are reset to the factory defaults by a cold reset. None of the service mode variables such as the following...
Service Manual
Page 442
...: Turn off or on -screen, and output colors is not sent, the printer has no way of the color before sending the information to the printer driver. Troubleshooting EN The default color might convert or modify some characteristics of knowing the white point, black point, and chromaticity assumptions used , make the transition from the monitor. Matching screen colors Matching input, on to the printer default. Any color characteristics not addressed by the printer driver...
...: Turn off or on -screen, and output colors is not sent, the printer has no way of the color before sending the information to the printer driver. Troubleshooting EN The default color might convert or modify some characteristics of knowing the white point, black point, and chromaticity assumptions used , make the transition from the monitor. Matching screen colors Matching input, on to the printer default. Any color characteristics not addressed by the printer driver...
Service Manual
Page 454
... resolve poor color-plane registration. If the problem still exists after replacing a color toner cartridge (see "Toner cartridge manufacturing codes" on page 456). 2 Check the green handle (see figure 79 on page 443 show all three types: In the upper left, yellow is offset from colors that use yellow. In the upper right, colors are offset from black, causing a noticeable gap. At the bottom, the double line is characterized...
... resolve poor color-plane registration. If the problem still exists after replacing a color toner cartridge (see "Toner cartridge manufacturing codes" on page 456). 2 Check the green handle (see figure 79 on page 443 show all three types: In the upper left, yellow is offset from colors that use yellow. In the upper right, colors are offset from black, causing a noticeable gap. At the bottom, the double line is characterized...
Service Manual
Page 484
... appears on the control panel display. To calibrate the staple position 1 Turn the printer off. 2 Enter service mode (see "To exit service mode" later in memory the configured compensation values for the staple position. VALUE + until One Staple appears. 8 Press SELECT. 9 Press MENU until Information Menu appears. 10 Press ITEM until Print Paper Path Test appears. 11 Print a ten-page job to the stapler bin (optional bin 1). 12 Check the staple position...
... appears on the control panel display. To calibrate the staple position 1 Turn the printer off. 2 Enter service mode (see "To exit service mode" later in memory the configured compensation values for the staple position. VALUE + until One Staple appears. 8 Press SELECT. 9 Press MENU until Information Menu appears. 10 Press ITEM until Print Paper Path Test appears. 11 Print a ten-page job to the stapler bin (optional bin 1). 12 Check the staple position...
Service Manual
Page 605
... removing 280 cartridges disengaged toner 377 imaging drum 136 installing black toner 100 installing color toner 101 location 118 replace frequency 119 toner not installed 399 CASSETTE mode 103 casters adjustable (3,000-sheet Stapler/Stacker and 3,000-sheet Stacker) 361 stationary (3,000-sheet stapler/stacker and 3,000- location 118 replace frequency 119 switch 187 toner level detection 159 blind cover (multi-bin mailbox) 210 BNC accessories 512 connection 76 port 76 T connector 77 boards. See keys on control panel C C5-sized...
... removing 280 cartridges disengaged toner 377 imaging drum 136 installing black toner 100 installing color toner 101 location 118 replace frequency 119 toner not installed 399 CASSETTE mode 103 casters adjustable (3,000-sheet Stapler/Stacker and 3,000-sheet Stacker) 361 stationary (3,000-sheet stapler/stacker and 3,000- location 118 replace frequency 119 switch 187 toner level detection 159 blind cover (multi-bin mailbox) 210 BNC accessories 512 connection 76 port 76 T connector 77 boards. See keys on control panel C C5-sized...
Service Manual
Page 606
... output bin jams 393 transfer drum jams 394 unexpected paper size jams 394 C-link cable connection 43, 75 description 207 clutches feed roller 189 registration roller 189 transfer belt press 189 tray 1 pick-up roller 189 clutches (2,000-sheet input unit) main drive 200 names and locations 200 VTU 200 CLx. clutches (2,000-sheet input unit) coaxial cables 77 cold reset (CR) message 395 paper size 94 Color Adjust Menu 92 color adjust page 458 color cartridge sensor 251 color page count 93 color toner...
... output bin jams 393 transfer drum jams 394 unexpected paper size jams 394 C-link cable connection 43, 75 description 207 clutches feed roller 189 registration roller 189 transfer belt press 189 tray 1 pick-up roller 189 clutches (2,000-sheet input unit) main drive 200 names and locations 200 VTU 200 CLx. clutches (2,000-sheet input unit) coaxial cables 77 cold reset (CR) message 395 paper size 94 Color Adjust Menu 92 color adjust page 458 color cartridge sensor 251 color page count 93 color toner...
Service Manual
Page 607
... continuous configuration pages, printing 83 continuous test message 395 control panel display language 97 illustration and description 80 LEDs 80 location 41 menu maps 82 messages 368 removing 246 control panel messages 3,000-sheet stapler/stacker and 3,000-sheet stacker 491 control panel overlay changing 79 parts list 514 controller electronic error 386 RAM error 384 controller boards 2,000-sheet input unit 307 EPH (external paper-handling) 199, 207 multi-bin mailbox 209, 210, 327 printer 277 copies, configuring 89 copy module printer model included...
... continuous configuration pages, printing 83 continuous test message 395 control panel display language 97 illustration and description 80 LEDs 80 location 41 menu maps 82 messages 368 removing 246 control panel messages 3,000-sheet stapler/stacker and 3,000-sheet stacker 491 control panel overlay changing 79 parts list 514 controller electronic error 386 RAM error 384 controller boards 2,000-sheet input unit 307 EPH (external paper-handling) 199, 207 multi-bin mailbox 209, 210, 327 printer 277 copies, configuring 89 copy module printer model included...
Service Manual
Page 609
... 607 drums cleaning transfer 465 illustration 136 installing imaging 124 installing transfer 120 location 118 replace frequency 119 dual inline memory modules (DIMMs). See DIMMs (dual inline memory modules) duplex printing configuring 86 process 199 total page count 94 duplex registration 107, 416 Duplex Registration Menu 91 duplexer accessories 22, 512 adjusting registration 107 booklet printing 109 deflector 136 error 397 jams 389, 392 location 44 media specifications 35 printer model included with 22 dynamic random access memory...
... 607 drums cleaning transfer 465 illustration 136 installing imaging 124 installing transfer 120 location 118 replace frequency 119 dual inline memory modules (DIMMs). See DIMMs (dual inline memory modules) duplex printing configuring 86 process 199 total page count 94 duplex registration 107, 416 Duplex Registration Menu 91 duplexer accessories 22, 512 adjusting registration 107 booklet printing 109 deflector 136 error 397 jams 389, 392 location 44 media specifications 35 printer model included with 22 dynamic random access memory...
Service Manual
Page 610
... printer 136 feeder assembly 257, 550 feeding error 379 manual 404 process 179 speeds 179 field replaceable units (FRUs) 2,000-sheet input unit 298 ordering 63 parts list 516 files operation failed 396 printing directories 83 filler panel for tray 2 231 filters installing air 124 installing charcoal 120 location 118 ozone 58 replace frequency 119 Finland laser statement 56 firmware error 373 test 95 FIRST (Fax Information Retrieval Support Technology) Europe 65 U.S. 64 FIRST mode 103 fixer. See fuser fixing. expired fuser...
... printer 136 feeder assembly 257, 550 feeding error 379 manual 404 process 179 speeds 179 field replaceable units (FRUs) 2,000-sheet input unit 298 ordering 63 parts list 516 files operation failed 396 printing directories 83 filler panel for tray 2 231 filters installing air 124 installing charcoal 120 location 118 ozone 58 replace frequency 119 Finland laser statement 56 firmware error 373 test 95 FIRST (Fax Information Retrieval Support Technology) Europe 65 U.S. 64 FIRST mode 103 fixer. See fuser fixing. expired fuser...
Service Manual
Page 614
...-sheet input unit) 203, 204 lights. See LEDs line feed command 90 list server 64 lists font 83 parts 509 LocalTalk accessories 512 networks 76 parts list 513 port 76 lock detection for toner cartridges 456 margin 34 matching colors 440 Material Safety Data Sheet (MSDS) 57, 64 maximum media sizes 31 MBM. See pick-up motor Macintosh cable parts list 513 magenta detail value 92 smooth value 92 magenta toner cartridge installing 101 location 118 replace...
...-sheet input unit) 203, 204 lights. See LEDs line feed command 90 list server 64 lists font 83 parts 509 LocalTalk accessories 512 networks 76 parts list 513 port 76 lock detection for toner cartridges 456 margin 34 matching colors 440 Material Safety Data Sheet (MSDS) 57, 64 maximum media sizes 31 MBM. See pick-up motor Macintosh cable parts list 513 magenta detail value 92 smooth value 92 magenta toner cartridge installing 101 location 118 replace...
Service Manual
Page 616
... transparencies. See transparencies OHT mode 179 online indicator 81 support 62 online help 81 operating environment requirements 27 environment specifications 24 specifications 24 operating system color characteristics 440 options ordering 511 parts list 512 ordering accessories 511 consumables 62, 511 DIMMs 511 documentation and software 62 options 511 parts 511 orientation configuring default 89 media in input trays 31 output bins configuring destinations 86 full 403, 409, 411 jams 393 multi-bin mailbox...
... transparencies. See transparencies OHT mode 179 online indicator 81 support 62 online help 81 operating environment requirements 27 environment specifications 24 specifications 24 operating system color characteristics 440 options ordering 511 parts list 512 ordering accessories 511 consumables 62, 511 DIMMs 511 documentation and software 62 options 511 parts 511 orientation configuring default 89 media in input trays 31 output bins configuring destinations 86 full 403, 409, 411 jams 393 multi-bin mailbox...
Service Manual
Page 625
... print defect 454 websites for support 62 weight media in duplexer 35 media in input trays 31 printer 25 wheels, developer DSD 464 EN width of printer 25 wiring diagrams 503 wrinkled pages 433 write protected hard disk 396 wrong page request 481 Y yellow detail value 92 smooth value 92 yellow toner cartridge installing 101 location 118 replace frequency 119 Index 623 U unexpected paper size jams 394 paper size/type...
... print defect 454 websites for support 62 weight media in duplexer 35 media in input trays 31 printer 25 wheels, developer DSD 464 EN width of printer 25 wiring diagrams 503 wrinkled pages 433 write protected hard disk 396 wrong page request 481 Y yellow detail value 92 smooth value 92 yellow toner cartridge installing 101 location 118 replace frequency 119 Index 623 U unexpected paper size jams 394 paper size/type...