Service Manual
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... detection 157 Color toner lever detection 158 Density sensor 160 Transfer belt control 161 Cleaning roller control 162 Carousel control 163 Power distribution circuit diagram 164 Power Save circuit diagram 165 High-voltage power supply circuit 168 Laser/scanner 170 Printer motors and ...up 181 Tray 1 pick-up 183 Printer sensors 184 Printer switches 186 Printer clutches and solenoids 189 Fusing and delivery unit 191 Timing chart for WAIT period (1 of 2 193 Timing chart for WAIT period (2 of 2 194 Timing chart, printing full-color letter-sized page (1 of 2 195...
... detection 157 Color toner lever detection 158 Density sensor 160 Transfer belt control 161 Cleaning roller control 162 Carousel control 163 Power distribution circuit diagram 164 Power Save circuit diagram 165 High-voltage power supply circuit 168 Laser/scanner 170 Printer motors and ...up 181 Tray 1 pick-up 183 Printer sensors 184 Printer switches 186 Printer clutches and solenoids 189 Fusing and delivery unit 191 Timing chart for WAIT period (1 of 2 193 Timing chart for WAIT period (2 of 2 194 Timing chart, printing full-color letter-sized page (1 of 2 195...
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...on left door 232 Figure 84. Screws on lower left panel 230 Figure 82. Formatter board 254 Figure 106. Attachment bracket, HP Color LaserJet 8550 MFP printer 227 Figure 78. Filler panel for tray 2 231 Figure 83. Connector on formatter board 256 Figure 107. Rear cover 244 ...Figure 112. Orientation of 2 258 Figure 110. Stopper hinges on upper left 226 Figure 77. Laser/scanner shield 247 Figure 99. Registration roller assembly (back 264 EN List of printer and accessories: top, front, and right 225 Figure 76. Screws on right cover subassembly 240...
...on left door 232 Figure 84. Screws on lower left panel 230 Figure 82. Formatter board 254 Figure 106. Attachment bracket, HP Color LaserJet 8550 MFP printer 227 Figure 78. Filler panel for tray 2 231 Figure 83. Connector on formatter board 256 Figure 107. Rear cover 244 ...Figure 112. Orientation of 2 258 Figure 110. Stopper hinges on upper left 226 Figure 77. Laser/scanner shield 247 Figure 99. Registration roller assembly (back 264 EN List of printer and accessories: top, front, and right 225 Figure 76. Screws on right cover subassembly 240...
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Flipper ribbon cable removal 359 Figure 210. Example of travel 442 Figure 224. Image orientation and direction of an HP Color LaserJet 8550 printer configuration page 417 Figure 214. Fading resulting from broken transfer guide 451 Figure 233. Rear view of 3 350 Figure ... of 3 352 Figure 203. Stapler/stacker controller PCA or stacker controller PCA removal 353 Figure 204. Stationary caster removal 360 Figure 211. Laser shutters 428 Figure 220. Right lower cover detection 429 Figure 222. Developer streak 444 Figure 226. Multi-bin mailbox power supply test mode...
Flipper ribbon cable removal 359 Figure 210. Example of travel 442 Figure 224. Image orientation and direction of an HP Color LaserJet 8550 printer configuration page 417 Figure 214. Fading resulting from broken transfer guide 451 Figure 233. Rear view of 3 350 Figure ... of 3 352 Figure 203. Stapler/stacker controller PCA or stacker controller PCA removal 353 Figure 204. Stationary caster removal 360 Figure 211. Laser shutters 428 Figure 220. Right lower cover detection 429 Figure 222. Developer streak 444 Figure 226. Multi-bin mailbox power supply test mode...
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Product information EN Printer Information 39 Configurations 39 External views 41 Formatter assemblies 43 Media-handling accessories and options 44 Safety information 46 FCC regulations 46 Canadian DOC regulations 46 Declarations of conformity 47 VCCI statement (Japan)-8500 models 54 VCCI statement (Japan)-8550 models 54 EMI statement (Korea)-8500 models 54 EMI statement (Korea)-8550 models 54 Laser safety statement 55 Laser statement for Finland 56 Product information sheet 57 Toner safety 57 Material Safety Data Sheet (MSDS 57 Ozone safety 58 20 Chapter 1 -
Product information EN Printer Information 39 Configurations 39 External views 41 Formatter assemblies 43 Media-handling accessories and options 44 Safety information 46 FCC regulations 46 Canadian DOC regulations 46 Declarations of conformity 47 VCCI statement (Japan)-8500 models 54 VCCI statement (Japan)-8550 models 54 EMI statement (Korea)-8500 models 54 EMI statement (Korea)-8550 models 54 Laser safety statement 55 Laser statement for Finland 56 Product information sheet 57 Toner safety 57 Material Safety Data Sheet (MSDS 57 Ozone safety 58 20 Chapter 1 -
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... F) media that produce hazardous emissions, melt, offset, or discolor when heated to the printer's fusing temperature (approximately 190° C, or 374° F) media that have already been through a photocopier or laser printer (even if there is no printing on the page) unless you use the "manual print ...second side" feature. media with watermarks, if solid fill areas are to be printed transparencies designed for ink jet printers any glossy media other than HP soft gloss media...
... F) media that produce hazardous emissions, melt, offset, or discolor when heated to the printer's fusing temperature (approximately 190° C, or 374° F) media that have already been through a photocopier or laser printer (even if there is no printing on the page) unless you use the "manual print ...second side" feature. media with watermarks, if solid fill areas are to be printed transparencies designed for ink jet printers any glossy media other than HP soft gloss media...
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...conformity DOC-HP Color LaserJet 8500 printer DECLARATION OF CONFORMITY according to ISO/IEC Guide 22 and EN 45014 Manufacturer's Name: Manufacturer's Address: Hewlett-Packard Company 11311 Chinden Boulevard Boise, Idaho 83714-1021, USA declares, that the product Product Name: Model Number: Product Options: HP Color LaserJet 8500, ...8500 N, 8500 DN C3983A, C3984A, C3985A ALL conforms to the following Product Specifications: Safety: IEC 950:1991+A1+A2+A3+A4 / EN 60950:1992+A1+A2+A3+A4 IEC 825-1:1993 / EN 60825-1:1994 Class 1 (Laser/LED) EMC:...
...conformity DOC-HP Color LaserJet 8500 printer DECLARATION OF CONFORMITY according to ISO/IEC Guide 22 and EN 45014 Manufacturer's Name: Manufacturer's Address: Hewlett-Packard Company 11311 Chinden Boulevard Boise, Idaho 83714-1021, USA declares, that the product Product Name: Model Number: Product Options: HP Color LaserJet 8500, ...8500 N, 8500 DN C3983A, C3984A, C3985A ALL conforms to the following Product Specifications: Safety: IEC 950:1991+A1+A2+A3+A4 / EN 60950:1992+A1+A2+A3+A4 IEC 825-1:1993 / EN 60825-1:1994 Class 1 (Laser/LED) EMC:...
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...Europe, Herrenberger Strasse 130, D-71034 Böblingen (Fax: +49-7031-14-3143) USA Contact: Product Regulations Manager, Hewlett-Packard Company, P.O. DOC-HP Color LaserJet 8550 printer DECLARATION OF CONFORMITY according to ISO/IEC Guide 22 and EN 45014 Manufacturer's Name: Manufacturer's Address: Hewlett-Packard Company 11311 Chinden Boulevard Boise, Idaho ...IEC 950:1991+A1+A2+A3+A4 / EN 60950:1992+A1+A2+A3+A4+A11 IEC 825-1:1993 / EN 60825-1:1994+A11 Class 1 (Laser/LED) EMC: CISPR 22:1997 / EN 55022:1998 Class A1 EN 61000-3-2:1995 EN 61000-3-3:1995 EN 55024:1998 FCC Title 47 CFR, ...
...Europe, Herrenberger Strasse 130, D-71034 Böblingen (Fax: +49-7031-14-3143) USA Contact: Product Regulations Manager, Hewlett-Packard Company, P.O. DOC-HP Color LaserJet 8550 printer DECLARATION OF CONFORMITY according to ISO/IEC Guide 22 and EN 45014 Manufacturer's Name: Manufacturer's Address: Hewlett-Packard Company 11311 Chinden Boulevard Boise, Idaho ...IEC 950:1991+A1+A2+A3+A4 / EN 60950:1992+A1+A2+A3+A4+A11 IEC 825-1:1993 / EN 60825-1:1994+A11 Class 1 (Laser/LED) EMC: CISPR 22:1997 / EN 55022:1998 Class A1 EN 61000-3-2:1995 EN 61000-3-3:1995 EN 55024:1998 FCC Title 47 CFR, ...
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...was manufactured under a formal quality system. Box 15 Mail Stop 160, Boise, ID 83707-0015 (Phone: 208-396-6000) Note See the HP Color LaserJet 8550 MFP printer Service Manual for Declarations of Conformity for the copy module, automatic document feeder, and 1,000-sheet input paper deck. Quality System This product was...IEC 950:1991+A1+A2+A3+A4+A11 / EN 60950:1992+A1+A2+A3+A4+A11 IEC 825-1:1993 / EN 60825-1:1994 Class 1 (Laser/LED) UL1950, Third Edition Additional Information: The product herewith complies with Part 15 of the FCC rules. Operation is subject to ISO/IEC Guide ...
...was manufactured under a formal quality system. Box 15 Mail Stop 160, Boise, ID 83707-0015 (Phone: 208-396-6000) Note See the HP Color LaserJet 8550 MFP printer Service Manual for Declarations of Conformity for the copy module, automatic document feeder, and 1,000-sheet input paper deck. Quality System This product was...IEC 950:1991+A1+A2+A3+A4+A11 / EN 60950:1992+A1+A2+A3+A4+A11 IEC 825-1:1993 / EN 60825-1:1994 Class 1 (Laser/LED) UL1950, Third Edition Additional Information: The product herewith complies with Part 15 of the FCC rules. Operation is subject to ISO/IEC Guide ...
Service Manual
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... The Center for Devices and Radiological Health (CDRH) of normal user operation. This printer is completely confined within protective housings and external covers, the laser beam cannot escape during any phase of the U.S. Compliance is mandatory for Health and Safety Act of ...1968. EN Safety information 55 Because radiation emitted inside this printer is certified as a "Class 1" laser product under the U.S. Department of Health and Human Services (DHHS) Radiation Performance Standard according to the Radiation Control for...
... The Center for Devices and Radiological Health (CDRH) of normal user operation. This printer is completely confined within protective housings and external covers, the laser beam cannot escape during any phase of the U.S. Compliance is mandatory for Health and Safety Act of ...1968. EN Safety information 55 Because radiation emitted inside this printer is certified as a "Class 1" laser product under the U.S. Department of Health and Human Services (DHHS) Radiation Performance Standard according to the Radiation Control for...
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... In such cases, it is advisable to ozone. Ozone is generated only while the printer is free of the electrophotographic process. The following conditions might be necessary. This HP LaserJet printer contains an charcoal filter to ozone have been established by -product of these standards when...Inspect your area. (Your employer is responsible for providing a work environment that is printing (while the coronas are a problem in laser printers and photocopiers generate ozone gas (O3) as a time-weighted average and a ceiling limit respectively. Almost all ozone concerns arise from...
... In such cases, it is advisable to ozone. Ozone is generated only while the printer is free of the electrophotographic process. The following conditions might be necessary. This HP LaserJet printer contains an charcoal filter to ozone have been established by -product of these standards when...Inspect your area. (Your employer is responsible for providing a work environment that is printing (while the coronas are a problem in laser printers and photocopiers generate ozone gas (O3) as a time-weighted average and a ceiling limit respectively. Almost all ozone concerns arise from...
Service Manual
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... control 166 High-voltage power supply circuit 167 Mechanical systems 169 Laser/scanner 169 Motors and heaters 171 Paper path 178 Pick-up/feed 179 Sensors, switches, clutches, and solenoids 184 Fusing and delivery unit 190 Media jam detection 192 Printer timing 192 EPH controller board 199 Duplexer 199 2,000-sheet input...
... control 166 High-voltage power supply circuit 167 Mechanical systems 169 Laser/scanner 169 Motors and heaters 171 Paper path 178 Pick-up/feed 179 Sensors, switches, clutches, and solenoids 184 Fusing and delivery unit 190 Media jam detection 192 Printer timing 192 EPH controller board 199 Duplexer 199 2,000-sheet input...
Service Manual
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... potential image on the exposed area is created with multiple layers. This helps prevent uneven surface charge on the imaging drum. This printer contains four toner cartridges (cyan, magenta, yellow, and black). Figure 26. Preconditioning exposure EN Image formation 143 The electrostatic latent ...the residual charge on the imaging drum surface. Electrostatic latent image formation block One of the differences between color and black-and-white laser imaging is that the color image is decreased. Preconditioning exposure To prepare for forming the image on the imaging drum.
... potential image on the exposed area is created with multiple layers. This helps prevent uneven surface charge on the imaging drum. This printer contains four toner cartridges (cyan, magenta, yellow, and black). Figure 26. Preconditioning exposure EN Image formation 143 The electrostatic latent ...the residual charge on the imaging drum surface. Electrostatic latent image formation block One of the differences between color and black-and-white laser imaging is that the color image is decreased. Preconditioning exposure To prepare for forming the image on the imaging drum.
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...always in the printer is nonmagnetic single-component toner composed of resin. The three color cartridges are given a negative charge when they rub against the developing cylinder and the blade. 4. EN Black toner cartridge (left) and color toner cartridge (right) development Image formation 145 The color toner is ...magnetic single-component toner composed of magnetite and resin. Figure 28. This bias consists of AC and DC components. The black toner cartridge is set separately, and is biased to the imaged region on the imaging drum exposed by the laser beam...
...always in the printer is nonmagnetic single-component toner composed of resin. The three color cartridges are given a negative charge when they rub against the developing cylinder and the blade. 4. EN Black toner cartridge (left) and color toner cartridge (right) development Image formation 145 The color toner is ...magnetic single-component toner composed of magnetite and resin. Figure 28. This bias consists of AC and DC components. The black toner cartridge is set separately, and is biased to the imaged region on the imaging drum exposed by the laser beam...
Service Manual
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Top assemblies Gain access to the following assemblies from the top of the printer: control panel laser/scanner unit face-down output assembly EN Top assemblies 245
Top assemblies Gain access to the following assemblies from the top of the printer: control panel laser/scanner unit face-down output assembly EN Top assemblies 245
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Laser/scanner unit 1 Remove the top cover assembly (see page 232). 2 On HP Color LaserJet 8550 printer models, remove four screws, two on each side (callout 1 shows two of them), from the laser/ scanner shield and lift the shield out of the printer (the shield is not present on HP Color LaserJet 8500 printer models). 12 Figure 98. Laser/scanner shield EN Top assemblies 247
Laser/scanner unit 1 Remove the top cover assembly (see page 232). 2 On HP Color LaserJet 8550 printer models, remove four screws, two on each side (callout 1 shows two of them), from the laser/ scanner shield and lift the shield out of the printer (the shield is not present on HP Color LaserJet 8500 printer models). 12 Figure 98. Laser/scanner shield EN Top assemblies 247
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...Event log message: 41.00.02 Description: Indicates that the EIO accessory is seated properly. 4 Turn the printer off and on to reset the printer. 3 Reconnect connector J1001 on the laser driver PCA and connector J205 on the controller board. 4 Reconnect connector J2 on beam detect PCA, relay ...routine failure detection See DISK DEVICE FAILURE in VTU is initializing. HP EIO ERROR Event log message: 40.00.00 Description: An EIO accessory connection has been abnormally broken while transferring data from the printer. 2 Turn the printer off and on to reset it. 5 If possible, print to...
...Event log message: 41.00.02 Description: Indicates that the EIO accessory is seated properly. 4 Turn the printer off and on to reset the printer. 3 Reconnect connector J1001 on the laser driver PCA and connector J205 on the controller board. 4 Reconnect connector J2 on beam detect PCA, relay ...routine failure detection See DISK DEVICE FAILURE in VTU is initializing. HP EIO ERROR Event log message: 40.00.00 Description: An EIO accessory connection has been abnormally broken while transferring data from the printer. 2 Turn the printer off and on to reset it. 5 If possible, print to...
Service Manual
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... and connector J211 on the controller board. 4 If the problem persists, replace the laser/ scanner unit. 5 If, after the printer is turned on the controller board after replacing the laser/scanner unit, the problem persists, replace the controller board. If the voltage changes from ... board. 3 Measure the voltage across connector J211-7 (SCND) and J211-6 (GND) on . Numbered printer messages (continued) 51 LASER ERROR CYCLE POWER Description: Indicates that a laser malfunction has occurred. 52 SCANNER ERROR CYCLE POWER Description: Indicates that the scanner motor is not turning properly...
... and connector J211 on the controller board. 4 If the problem persists, replace the laser/ scanner unit. 5 If, after the printer is turned on the controller board after replacing the laser/scanner unit, the problem persists, replace the controller board. If the voltage changes from ... board. 3 Measure the voltage across connector J211-7 (SCND) and J211-6 (GND) on . Numbered printer messages (continued) 51 LASER ERROR CYCLE POWER Description: Indicates that a laser malfunction has occurred. 52 SCANNER ERROR CYCLE POWER Description: Indicates that the scanner motor is not turning properly...
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...without entering the engine diagnostic mode results in damage to the laser and high voltages. Service mode engine diagnostics Engine diagnostics can be selected. High-voltage supplies and the laser are shut down whenever the printer is OFF in this mode and an unattended test might ...result in potential exposure to the printer. 420 Chapter 7 - Removing some tests require door interlocks to the ...
...without entering the engine diagnostic mode results in damage to the laser and high voltages. Service mode engine diagnostics Engine diagnostics can be selected. High-voltage supplies and the laser are shut down whenever the printer is OFF in this mode and an unattended test might ...result in potential exposure to the printer. 420 Chapter 7 - Removing some tests require door interlocks to the ...
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...Table 92. Parts and diagrams EN Alphabetical parts list (continued) Description Part number HP JetDirect Software Installation Guide (English) 5966-5171 HP LaserJet Printer Family Paper Specification 5021-8956 Guide HP LocalTalk cable kit 92215N HP Peripherals Connectivity Solutions Guide 5091-6456 IEEE-1284 compliant parallel cable of 3 m...RB2-0010-000CN Kit of rollers-jam access door (multi-bin mailbox) C4785-60526 Label, "CAUTION" RS5-8380-000CN Laser/scanner unit RG5-3936-000CN Latch, roller action RB1-5153-000CN Latch, roller action RF0-0003-000CN LED PCA C4788-60510...
...Table 92. Parts and diagrams EN Alphabetical parts list (continued) Description Part number HP JetDirect Software Installation Guide (English) 5966-5171 HP LaserJet Printer Family Paper Specification 5021-8956 Guide HP LocalTalk cable kit 92215N HP Peripherals Connectivity Solutions Guide 5091-6456 IEEE-1284 compliant parallel cable of 3 m...RB2-0010-000CN Kit of rollers-jam access door (multi-bin mailbox) C4785-60526 Label, "CAUTION" RS5-8380-000CN Laser/scanner unit RG5-3936-000CN Latch, roller action RB1-5153-000CN Latch, roller action RF0-0003-000CN LED PCA C4788-60510...
Service Manual
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...84 capacity circuit 24 input trays 31 media in multi-bin mailbox 33 media in printer 31 card stock. See timing charts checklists paper path 433 pretroubleshooting 367 circuits capacity 24... fuser abnormality detection 166 fusing heater safety 166 high-voltage power supply 167 laser/scanner motor lock detection 170 power distribution 164 Power Save 165 cleaning density sensor 389... defect 454 charging roller illustration 136 repetitive defects 464 charts, timing. See media carousel color toner error 377 control process 162 position sensor 162 stop solenoid 163 carousel button switch...
...84 capacity circuit 24 input trays 31 media in multi-bin mailbox 33 media in printer 31 card stock. See timing charts checklists paper path 433 pretroubleshooting 367 circuits capacity 24... fuser abnormality detection 166 fusing heater safety 166 high-voltage power supply 167 laser/scanner motor lock detection 170 power distribution 164 Power Save 165 cleaning density sensor 389... defect 454 charging roller illustration 136 repetitive defects 464 charts, timing. See media carousel color toner error 377 control process 162 position sensor 162 stop solenoid 163 carousel button switch...