Service Manual
Page 9
... After performing service ...70 Post-service test ...71 Print-quality test ...71 Parts removal order ...72 Customer self repair (CSR) components 74 Print cartridges ...74 Toner-collection unit ...76 Formatter PCA ...78 Hard drive ...79 Remove the hard drive 79 Memory DIMM ...81 Remove the memory DIMM 81 Enable memory 82...
... After performing service ...70 Post-service test ...71 Print-quality test ...71 Parts removal order ...72 Customer self repair (CSR) components 74 Print cartridges ...74 Toner-collection unit ...76 Formatter PCA ...78 Hard drive ...79 Remove the hard drive 79 Memory DIMM ...81 Remove the memory DIMM 81 Enable memory 82...
Service Manual
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...assembly 124 Registration assembly ...128 Remove the registration assembly 129 Residual-toner-feed motor 133 Remove the residual-toner-feed motor 133 Residual-toner duct and feed assembly 134 Remove the residual-toner duct and feed assembly 134 Cartridge fan and environmental sensor 137 ...Remove the cartridge fan and environmental sensor 137 Toner-collection sensor and scanner-thermistor assembly 141 Remove the toner-collection sensor and scanner-thermistor assembly ......... 141 Delivery fan ...143 Remove the delivery fan 143...
...assembly 124 Registration assembly ...128 Remove the registration assembly 129 Residual-toner-feed motor 133 Remove the residual-toner-feed motor 133 Residual-toner duct and feed assembly 134 Remove the residual-toner duct and feed assembly 134 Cartridge fan and environmental sensor 137 ...Remove the cartridge fan and environmental sensor 137 Toner-collection sensor and scanner-thermistor assembly 141 Remove the toner-collection sensor and scanner-thermistor assembly ......... 141 Delivery fan ...143 Remove the delivery fan 143...
Service Manual
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... 423 Product cold reset 424 Product updates ...424 4 Parts and diagrams Order parts, accessories, and supplies 426 Part numbers ...427 Accessories ...427 Print cartridges and toner collection unit 427 Memory ...427 Cables and interfaces ...427 Customer self repair (CSR) parts 428 Service maintenance kits 428 Unique components ...429 Screws ...430 How...
... 423 Product cold reset 424 Product updates ...424 4 Parts and diagrams Order parts, accessories, and supplies 426 Part numbers ...427 Accessories ...427 Print cartridges and toner collection unit 427 Memory ...427 Cables and interfaces ...427 Customer self repair (CSR) parts 428 Service maintenance kits 428 Unique components ...429 Screws ...430 How...
Service Manual
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...list ...476 Numerical parts list ...484 Appendix A Service and support Hewlett-Packard limited warranty statement 494 HP's Premium Protection Warranty: LaserJet print cartridge limited warranty statement 495 HP Color LaserJet Fuser Kit Limited Warranty Statement 496 End User License Agreement ...497 Customer self-repair warranty service 499 ... FCC regulations ...506 Environmental product stewardship program 507 Protecting the environment 507 Ozone production ...507 Power consumption ...507 Toner consumption ...507 Paper use ...507 Plastics ...507 HP LaserJet print supplies 507 xiv ENWW
...list ...476 Numerical parts list ...484 Appendix A Service and support Hewlett-Packard limited warranty statement 494 HP's Premium Protection Warranty: LaserJet print cartridge limited warranty statement 495 HP Color LaserJet Fuser Kit Limited Warranty Statement 496 End User License Agreement ...497 Customer self-repair warranty service 499 ... FCC regulations ...506 Environmental product stewardship program 507 Protecting the environment 507 Ozone production ...507 Power consumption ...507 Toner consumption ...507 Paper use ...507 Plastics ...507 HP LaserJet print supplies 507 xiv ENWW
Service Manual
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... Figure 1-25 ITB unit ...31 Figure 1-26 Three states of primary-transfer-roller engagement and disengagement 33 Figure 1-27 ITB cleaning process ...34 Figure 1-28 Toner patterns for calibration ...35 Figure 1-29 Paper path ...37 Figure 1-30 Switches and sensors for the pickup, feed, and delivery system 38 Figure 1-31 Motors...
... Figure 1-25 ITB unit ...31 Figure 1-26 Three states of primary-transfer-roller engagement and disengagement 33 Figure 1-27 ITB cleaning process ...34 Figure 1-28 Toner patterns for calibration ...35 Figure 1-29 Paper path ...37 Figure 1-30 Switches and sensors for the pickup, feed, and delivery system 38 Figure 1-31 Motors...
Service Manual
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... print cartridge (1 of 2 74 Figure 2-5 Remove the print cartridge (2 of 2 75 Figure 2-6 Remove the toner-collection unit (1 of 4 76 Figure 2-7 Remove the toner-collection unit (2 of 4 76 Figure 2-8 Remove the toner-collection unit (3 of 4 77 Figure 2-9 Remove the toner-collection unit (4 of 4 77 Figure 2-10 Remove the formatter ...78 Figure 2-11 Remove the hard...
... print cartridge (1 of 2 74 Figure 2-5 Remove the print cartridge (2 of 2 75 Figure 2-6 Remove the toner-collection unit (1 of 4 76 Figure 2-7 Remove the toner-collection unit (2 of 4 76 Figure 2-8 Remove the toner-collection unit (3 of 4 77 Figure 2-9 Remove the toner-collection unit (4 of 4 77 Figure 2-10 Remove the formatter ...78 Figure 2-11 Remove the hard...
Service Manual
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...8 132 Figure 2-96 Remove the residual-toner-feed motor 133 Figure 2-97 Remove the residual-toner duct and feed assembly (1 of 4 134 Figure 2-98 Remove the residual-toner duct and feed assembly (2 of 4 135 Figure 2-99 Remove the residual-toner duct and feed assembly (3 of 4 ...environmental sensor (7 of 7 140 Figure 2-108 Remove the toner-collection sensor and scanner-thermistor assembly (1 of 3 141 Figure 2-109 Remove the toner-collection sensor and scanner-thermistor assembly (2 of 3 142 Figure 2-110 Remove the toner-collection sensor and scanner-thermistor assembly (3 of 3 142 Figure...
...8 132 Figure 2-96 Remove the residual-toner-feed motor 133 Figure 2-97 Remove the residual-toner duct and feed assembly (1 of 4 134 Figure 2-98 Remove the residual-toner duct and feed assembly (2 of 4 135 Figure 2-99 Remove the residual-toner duct and feed assembly (3 of 4 ...environmental sensor (7 of 7 140 Figure 2-108 Remove the toner-collection sensor and scanner-thermistor assembly (1 of 3 141 Figure 2-109 Remove the toner-collection sensor and scanner-thermistor assembly (2 of 3 142 Figure 2-110 Remove the toner-collection sensor and scanner-thermistor assembly (3 of 3 142 Figure...
Service Manual
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... printed circuit assembly (PCA) ● The laser/scanner system, which forms the latent image on the photosensitive drum ● The image-formation system, which transfers a toner image onto the paper ● The media feed system, which uses a system of rollers and belts to transport the paper through the formatter, which stores...
... printed circuit assembly (PCA) ● The laser/scanner system, which forms the latent image on the photosensitive drum ● The image-formation system, which transfers a toner image onto the paper ● The media feed system, which uses a system of rollers and belts to transport the paper through the formatter, which stores...
Service Manual
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... fuser Pressurizes the pressure roller in the fuser Detects the print cartridges Moves the ITB and developing unit to the paper Fuses the toner image onto the paper Moves the last printed sheet into the output bin Stops the high-voltage power supply Stops each laser/scanner ...operation Period Duration Description Waiting Standby Initial rotation Printing Last rotation From the time the power is turned on the photosensitive drums Transfers the toner to the home position Cleans the ITB and secondary transfer roller The product is in the following table. ENWW Basic operation 3 The product...
... fuser Pressurizes the pressure roller in the fuser Detects the print cartridges Moves the ITB and developing unit to the paper Fuses the toner image onto the paper Moves the last printed sheet into the output bin Stops the high-voltage power supply Stops each laser/scanner ...operation Period Duration Description Waiting Standby Initial rotation Printing Last rotation From the time the power is turned on the photosensitive drums Transfers the toner to the home position Cleans the ITB and secondary transfer roller The product is in the following table. ENWW Basic operation 3 The product...
Service Manual
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... page) sensor Duplex re-pickup sensor (HP Color LaserJet CP4525dn, HP Color LaserJet CP4025dn, and HP Color LaserJet CP4525xh only) Tray 2 paper surface 1 sensor Tray 2 paper surface 2 sensor Tray 2 paper present sensor RD sensor Environment sensor (temperature and humidity) Yellow toner-level sensor Magenta toner-level sensor Cyan toner-level sensor Black toner-level sensor Residual toner full sensor Laser scanner temperature sensor ENWW...
... page) sensor Duplex re-pickup sensor (HP Color LaserJet CP4525dn, HP Color LaserJet CP4025dn, and HP Color LaserJet CP4525xh only) Tray 2 paper surface 1 sensor Tray 2 paper surface 2 sensor Tray 2 paper present sensor RD sensor Environment sensor (temperature and humidity) Yellow toner-level sensor Magenta toner-level sensor Cyan toner-level sensor Black toner-level sensor Residual toner full sensor Laser scanner temperature sensor ENWW...
Service Manual
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... image-formation systems. Table 1-5 Motors Abbreviation Name Purpose Failure detection M1 ITB motor Drives the ITB and residual Yes toner feed screw M2 Fuser motor Drives the fuser sleeve, Yes pressure roller, fuser pressure roller, and primary transfer roller ...unit No motor disengagement M11 Duplex reverse motor (HP Drives the duplex reverse No Color LaserJet CP4525dn, roller and duplex feed roller HP Color LaserJet CP4025dn , and HP Color LaserJet CP4525xh only) M12 Residual toner-feed motor Drives the residual toner feed Yes screw M13 Pickup motor Drives the ...
... image-formation systems. Table 1-5 Motors Abbreviation Name Purpose Failure detection M1 ITB motor Drives the ITB and residual Yes toner feed screw M2 Fuser motor Drives the fuser sleeve, Yes pressure roller, fuser pressure roller, and primary transfer roller ...unit No motor disengagement M11 Duplex reverse motor (HP Drives the duplex reverse No Color LaserJet CP4525dn, roller and duplex feed roller HP Color LaserJet CP4025dn , and HP Color LaserJet CP4525xh only) M12 Residual toner-feed motor Drives the residual toner feed Yes screw M13 Pickup motor Drives the ...
Service Manual
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... speed of the motor is not in the specified range for a specified time after the motor reaches a specified speed. ● Lock detection (for the residual toner feed motor): the value of the motor drive signal voltage is a fan failure and notifies the formatter if the fan locks for a specified time from...
... speed of the motor is not in the specified range for a specified time after the motor reaches a specified speed. ● Lock detection (for the residual toner feed motor): the value of the motor drive signal voltage is a fan failure and notifies the formatter if the fan locks for a specified time from...
Service Manual
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The primary-charging-bias circuit in the high-voltage power supply generates the biases for each color. 10 Chapter 1 Theory of the photosensitive drum to transfer toner during the image-formation process: ● Primary-charging roller (in the cartridge) ● Developing roller (in the ... power supply D Primary charging circuit bias circuit The high-voltage power supply contains several separate circuits. The developing bias adheres toner to generate biases. High-voltage power supply The DC controller controls the high-voltage power supply to an electrostatic latent image ...
The primary-charging-bias circuit in the high-voltage power supply generates the biases for each color. 10 Chapter 1 Theory of the photosensitive drum to transfer toner during the image-formation process: ● Primary-charging roller (in the cartridge) ● Developing roller (in the ... power supply D Primary charging circuit bias circuit The high-voltage power supply contains several separate circuits. The developing bias adheres toner to generate biases. High-voltage power supply The DC controller controls the high-voltage power supply to an electrostatic latent image ...
Service Manual
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The secondary transfer bias circuit in the toner collection box. The secondary transfer bias transfers the toner image from each color. The reversed bias transfers residual toner on the ITB is deposited in the high-voltage power supply generates the bias. The residual toner on the secondary transfer roller back to the ITB. ...Table 1-7 High-voltage power supply circuits (continued) Circuit Description Primary-transfer-bias generation Secondary-transfer-bias generation The primary transfer bias transfers the toner from the ITB onto the paper. ENWW Engine-control system 11
The secondary transfer bias circuit in the toner collection box. The secondary transfer bias transfers the toner image from each color. The reversed bias transfers residual toner on the ITB is deposited in the high-voltage power supply generates the bias. The residual toner on the secondary transfer roller back to the ITB. ...Table 1-7 High-voltage power supply circuits (continued) Circuit Description Primary-transfer-bias generation Secondary-transfer-bias generation The primary transfer bias transfers the toner from the ITB onto the paper. ENWW Engine-control system 11
Service Manual
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... door open . ENWW Laser/scanner system 19 The laser/scanner system does not have a mechanical laser shutter. These openings are covered by paper dust or toner) a protective-glass cleaner (PGC) cleans them. When the cartridge is pulled out, the cleaning pad is returned to the laser/scanner system, when the front...
... door open . ENWW Laser/scanner system 19 The laser/scanner system does not have a mechanical laser shutter. These openings are covered by paper dust or toner) a protective-glass cleaner (PGC) cleans them. When the cartridge is pulled out, the cleaning pad is returned to the laser/scanner system, when the front...
Service Manual
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... ● Fuser ● Laser /scanner units The DC controller controls the laser scanner unit and each of the high-voltage power supplies to form the toner image on the paper. Image-formation system The image-formation system creates the printed image on the photosensitive drum surface, according to the VIDEO signals...
... ● Fuser ● Laser /scanner units The DC controller controls the laser scanner unit and each of the high-voltage power supplies to form the toner image on the paper. Image-formation system The image-formation system creates the printed image on the photosensitive drum surface, according to the VIDEO signals...
Service Manual
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...invisible latent image forms on the photosensitive drums. The toner image transfers to the ITB and later to the paper. The toner fuses to the paper to make a permanent image. Primary charging 3. Residual toner is removed from the ITB. Developing Developing 10. ITB... Latent image formation Pickup Steps 1. Secondary transfer 7. Image-formation process The image-formation system consists of the photosensitive drums. Toner adheres to the electrostatic latent image on the surface of ten steps divided into six functional blocks. Figure 1-12 Image-formation...
...invisible latent image forms on the photosensitive drums. The toner image transfers to the ITB and later to the paper. The toner fuses to the paper to make a permanent image. Primary charging 3. Residual toner is removed from the ITB. Developing Developing 10. ITB... Latent image formation Pickup Steps 1. Secondary transfer 7. Image-formation process The image-formation system consists of the photosensitive drums. Toner adheres to the electrostatic latent image on the surface of ten steps divided into six functional blocks. Figure 1-12 Image-formation...
Service Manual
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Because the negatively charged surface of each drum. Figure 1-15 Laser-beam exposure Laser beam Step 4: Development Toner acquires a negative charge as the developing cylinder contacts the developing blade. Figure 1-16 Development Developing blade Developing roller Photosensitive drum Developing bias ENWW Image-formation .... The latent image becomes visible on the surface of the photosensitive drums have been neutralized where they have been struck by the laser beam, the toner adheres to those areas, which are then ready to accept...
Because the negatively charged surface of each drum. Figure 1-15 Laser-beam exposure Laser beam Step 4: Development Toner acquires a negative charge as the developing cylinder contacts the developing blade. Figure 1-16 Development Developing blade Developing roller Photosensitive drum Developing bias ENWW Image-formation .... The latent image becomes visible on the surface of the photosensitive drums have been neutralized where they have been struck by the laser beam, the toner adheres to those areas, which are then ready to accept...
Service Manual
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The complete toner image transfers onto the paper. Figure 1-18 Secondary transfer Secondary transfer opposed roller ITB Paper Secondary transfer roller Secondary transfer bias 26 Chapter 1 Theory of ... Step 6: Secondary transfer The paper acquires a positive charge from the secondary-transfer roller, and so it attracts the negatively charged toner from the surface of each photosensitive drum, and the complete toner image transfers onto the ITB. Step 5: Primary transfer The positively charged primary-transfer rollers contact the ITB, giving the ITB...
The complete toner image transfers onto the paper. Figure 1-18 Secondary transfer Secondary transfer opposed roller ITB Paper Secondary transfer roller Secondary transfer bias 26 Chapter 1 Theory of ... Step 6: Secondary transfer The paper acquires a positive charge from the secondary-transfer roller, and so it attracts the negatively charged toner from the surface of each photosensitive drum, and the complete toner image transfers onto the ITB. Step 5: Primary transfer The positively charged primary-transfer rollers contact the ITB, giving the ITB...
Service Manual
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The static-charge eliminator removes excess charge from the ITB as the ITB bends. Figure 1-20 Fusing Fuser heater Fuser sleeve Toner Paper Pressure roller ENWW Image-formation system 27 Step 7: Separation The stiffness of the paper causes it to separate from the paper to melt the toner onto the page. Figure 1-19 Separation Secondary transfer opposed roller ITB Paper Secondary transfer roller Static charge eliminator Step 8: Fusing To create the permanent image, the paper passes through heated, pressurized rollers to make sure that the toner fuses correctly.
The static-charge eliminator removes excess charge from the ITB as the ITB bends. Figure 1-20 Fusing Fuser heater Fuser sleeve Toner Paper Pressure roller ENWW Image-formation system 27 Step 7: Separation The stiffness of the paper causes it to separate from the paper to melt the toner onto the page. Figure 1-19 Separation Secondary transfer opposed roller ITB Paper Secondary transfer roller Static charge eliminator Step 8: Fusing To create the permanent image, the paper passes through heated, pressurized rollers to make sure that the toner fuses correctly.