Service Manual
Page 7
HP LaserJet 4300 series printer only 170 Laser/scanner assembly 173 Print-cartridge motor (HP LaserJet 4300 series printer only 175 Main motor 177 Tray 2 lifter-drive assembly 179 DC controller PCA 181 Q2431-90912 Table of contents v Image-formation system 118 Electrostatic latent-...
HP LaserJet 4300 series printer only 170 Laser/scanner assembly 173 Print-cartridge motor (HP LaserJet 4300 series printer only 175 Main motor 177 Tray 2 lifter-drive assembly 179 DC controller PCA 181 Q2431-90912 Table of contents v Image-formation system 118 Electrostatic latent-...
Service Manual
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Location of 2 139 Figure 64. Transfer roller 138 Figure 62. Tray 1 pickup roller (2 of printer, input trays, and cabinet wheel locks 136 Figure 59. Tray 1 separation pad 140 Figure 65. Accessory covers (1 of 4 143 Figure 71. Accessory covers...Print cartridge memory chip 126 Figure 58. Top cover (5 of 5 170 Figure 113. Rear output bin (1 of 5 172 Figure 117. Cooling fan (HP LaserJet 4300 series only; 5 of 2 155 Figure 92. Laser/scanner (1 of 4 173 x List of 4 141 Figure 66. Tray 2 feed rollers (1 of figures Q2431-90912 Control-panel assembly (2 of 4...
Location of 2 139 Figure 64. Transfer roller 138 Figure 62. Tray 1 pickup roller (2 of printer, input trays, and cabinet wheel locks 136 Figure 59. Tray 1 separation pad 140 Figure 65. Accessory covers (1 of 4 143 Figure 71. Accessory covers...Print cartridge memory chip 126 Figure 58. Top cover (5 of 5 170 Figure 113. Rear output bin (1 of 5 172 Figure 117. Cooling fan (HP LaserJet 4300 series only; 5 of 2 155 Figure 92. Laser/scanner (1 of 4 173 x List of 4 141 Figure 66. Tray 2 feed rollers (1 of figures Q2431-90912 Control-panel assembly (2 of 4...
Service Manual
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...domestic environment, this device must accept any interference received, including interference that the product Product Name: HP LaserJet 4200 series HP LaserJet 4300 series Regulatory Model Numbers: BOISB-0203-00 BOISB-0204-00 Product Options: ALL conforms to the following...Safety: EMC: IEC 60950:1999 / EN 60950:2000 IEC 60825-1:1993+A1 / EN 60825-1+A11 Class 1 Laser/LED Product GB4943:1995 *2) CISPR 22:1993+A1+A2 / EN 55022:1994+A1+A2 Class B EN 61000... de compatibilité électromagnétique (CEM). 26 Printer description Q2431-90912 Operation is a class A product.
...domestic environment, this device must accept any interference received, including interference that the product Product Name: HP LaserJet 4200 series HP LaserJet 4300 series Regulatory Model Numbers: BOISB-0203-00 BOISB-0204-00 Product Options: ALL conforms to the following...Safety: EMC: IEC 60950:1999 / EN 60950:2000 IEC 60825-1:1993+A1 / EN 60825-1+A11 Class 1 Laser/LED Product GB4943:1995 *2) CISPR 22:1993+A1+A2 / EN 55022:1994+A1+A2 Class B EN 61000... de compatibilité électromagnétique (CEM). 26 Printer description Q2431-90912 Operation is a class A product.
Service Manual
Page 87
...Print This is the period of time from the completion of time from when the printer power is the period of the print job until the main motor or drum motor (HP LaserJet 4300 only) begins to prepare for printing. Introduction Q2431-90912 This chapter presents an overview...period. The final page of time when the photosensitive drum is turned off. The table in the printer. It also provides a general description of the following: q Basic operation of the printer q Power supply q Laser/scanner assembly q Image formation q Paper pickup and feeding q 500-sheet feeder operation q 1,500...
...Print This is the period of time from the completion of time from when the printer power is the period of the print job until the main motor or drum motor (HP LaserJet 4300 only) begins to prepare for printing. Introduction Q2431-90912 This chapter presents an overview...period. The final page of time when the photosensitive drum is turned off. The table in the printer. It also provides a general description of the following: q Basic operation of the printer q Power supply q Laser/scanner assembly q Image formation q Paper pickup and feeding q 500-sheet feeder operation q 1,500...
Service Manual
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... is provided about the following components. General descriptions This section describes individual components found in the printer. HP LaserJet 4300 only Figure 6. q DC controller PCA q Power supply assembly q Pickup and feed assembly q Laser/scanner assembly q Image formation system q 500-sheet feeder q 1,500-sheet feeder q envelope feeder q Duplexer q Stacker and stapler/stacker DC controller PCA The...
... is provided about the following components. General descriptions This section describes individual components found in the printer. HP LaserJet 4300 only Figure 6. q DC controller PCA q Power supply assembly q Pickup and feed assembly q Laser/scanner assembly q Image formation system q 500-sheet feeder q 1,500-sheet feeder q envelope feeder q Duplexer q Stacker and stapler/stacker DC controller PCA The...
Service Manual
Page 94
...the sensors and the DC controller PCA. The ac voltage is generated by printer components (like the main motor, laser/ scanner assembly motor, solenoids and clutches. The +24 vdc voltage is applied to printer components like the motors and fans). The dc positive bias is supplied ... roller during the transfer roller cleaning process. The fuser voltage (bias) prevents toner on one type of fuser biases. For the HP LaserJet 4300 there are two types of developing biases. These biases are two types of developing biases. There are superimposed on the media from ...
...the sensors and the DC controller PCA. The ac voltage is generated by printer components (like the main motor, laser/ scanner assembly motor, solenoids and clutches. The +24 vdc voltage is applied to printer components like the motors and fans). The dc positive bias is supplied ... roller during the transfer roller cleaning process. The fuser voltage (bias) prevents toner on one type of fuser biases. For the HP LaserJet 4300 there are two types of developing biases. These biases are two types of developing biases. There are superimposed on the media from ...
Service Manual
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For the HP LaserJet 4300, the print cartridge motor power also is turned on...HP LaserJet 4200 general timing diagram" on page 357 and "HP LaserJet 4300 general timing diagram" on page 358. Q2431-90912 Chapter 5 Theory of these operations, see "Printer switches and sensors" on page 336 and "Printer motors and fans" on . Fuser/delivery block Figure 15. The laser...block Paper pickup/feed and fuser/delivery block diagram Paper pickup and feed block The printer functions that the laser/scanner is activated (SL101) and the pickup arm descends. For information about the ...
For the HP LaserJet 4300, the print cartridge motor power also is turned on...HP LaserJet 4200 general timing diagram" on page 357 and "HP LaserJet 4300 general timing diagram" on page 358. Q2431-90912 Chapter 5 Theory of these operations, see "Printer switches and sensors" on page 336 and "Printer motors and fans" on . Fuser/delivery block Figure 15. The laser...block Paper pickup/feed and fuser/delivery block diagram Paper pickup and feed block The printer functions that the laser/scanner is activated (SL101) and the pickup arm descends. For information about the ...
Service Manual
Page 138
...The drum is transferred to the surface of the drum to create the electrostatic latent image, which rotates the photosensitive drum (the HP LaserJet 4300 uses a separate print cartridge motor to a visual image when toner on the photosensitive drum changes to rotate the drum), the developing... During this toner is then exposed to the laser beam from the photosensitive drum. The latent image formed on the developing cylinder is separated from the laser/scanner which neutralizes portions of the photosensitive drum in the printer. q Transferring the image The toner is transferred...
...The drum is transferred to the surface of the drum to create the electrostatic latent image, which rotates the photosensitive drum (the HP LaserJet 4300 uses a separate print cartridge motor to a visual image when toner on the photosensitive drum changes to rotate the drum), the developing... During this toner is then exposed to the laser beam from the photosensitive drum. The latent image formed on the developing cylinder is separated from the laser/scanner which neutralizes portions of the photosensitive drum in the printer. q Transferring the image The toner is transferred...
Service Manual
Page 151
HP LaserJet 4300 series printer only) . . . . . 170 Laser/scanner assembly 173 Print-cartridge motor (HP LaserJet 4300 series printer only 175 Main motor 177 Tray 2 lifter-drive assembly 179 DC controller PCA 181 Paper-pickup assembly 183 Main drive assembly 186 ...parts Contents Removal and replacement strategy 133 Required tools 133 Before performing service 133 After completing service 133 Screws used in the printer 134 Parts-removal tree 135 Printer input tray, and cabinet wheel locks 136 User-replaceable parts 137 Print cartridge 137 Transfer roller 138 Tray 1 pickup roller...
HP LaserJet 4300 series printer only) . . . . . 170 Laser/scanner assembly 173 Print-cartridge motor (HP LaserJet 4300 series printer only 175 Main motor 177 Tray 2 lifter-drive assembly 179 DC controller PCA 181 Paper-pickup assembly 183 Main drive assembly 186 ...parts Contents Removal and replacement strategy 133 Required tools 133 Before performing service 133 After completing service 133 Screws used in the printer 134 Parts-removal tree 135 Printer input tray, and cabinet wheel locks 136 User-replaceable parts 137 Print cartridge 137 Transfer roller 138 Tray 1 pickup roller...
Service Manual
Page 338
...paper path. q Inspect the gears that are connected to store it correctly. HP LaserJet 4300 only q Replace the print cartridge motor (HP LaserJet 4300 only). Turn over the stack of the cables to the laser/scanner assembly. See "Paper specifications" on page 9. Gears are worn, ...causing slippage or jumping. Table 62. smaller than the photoconductive drum it correctly. The laser/scanner assembly is used. See "Print-cartridge motor (HP LaserJet 4300 series printer only)" on page 56. 3. If the problem persists, and the defect repeats at the Repetitive...
...paper path. q Inspect the gears that are connected to store it correctly. HP LaserJet 4300 only q Replace the print cartridge motor (HP LaserJet 4300 only). Turn over the stack of the cables to the laser/scanner assembly. See "Paper specifications" on page 9. Gears are worn, ...causing slippage or jumping. Table 62. smaller than the photoconductive drum it correctly. The laser/scanner assembly is used. See "Print-cartridge motor (HP LaserJet 4300 series printer only)" on page 56. 3. If the problem persists, and the defect repeats at the Repetitive...
Service Manual
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..." on page 173 White lines opposite the paper path The print drum is defective. 2. Laser/scanner assembly. DC controller PCA. See "Formatter assembly" on page 56. Process a printer cleaning page. See "Running the cleaning page manually" on page 161. Check the tray ... 2. Smudged lines (either direction) Possible cause Recommended action(s) Paper path contamination or damage. 1. Check for other tray's rollers for the HP LaserJet 4300 printer. See "Laser/scanner assembly" on page 162. If the defect developed on page 56. q If the problem persists, replace the fuser. q The ...
..." on page 173 White lines opposite the paper path The print drum is defective. 2. Laser/scanner assembly. DC controller PCA. See "Formatter assembly" on page 56. Process a printer cleaning page. See "Running the cleaning page manually" on page 161. Check the tray ... 2. Smudged lines (either direction) Possible cause Recommended action(s) Paper path contamination or damage. 1. Check for other tray's rollers for the HP LaserJet 4300 printer. See "Laser/scanner assembly" on page 162. If the defect developed on page 56. q If the problem persists, replace the fuser. q The ...