Service Manual
Page 16
...installed in the HPLaserJet 4 Plus? Yes Yes Yes Yes Yes No No Yes Yes Yes Yes Yes No No No No No No Yes Does it work in the HP LaserJet 4, the printer will display a "53.1X.08 ERROR" (X indicates the position of RAM In every instance the repair procedures for all products ...are not. Product Family Information The model HP C2021A is identical to the model HP C2001A from a hardware standpoint, as is the...
...installed in the HPLaserJet 4 Plus? Yes Yes Yes Yes Yes No No Yes Yes Yes Yes Yes No No No No No No Yes Does it work in the HP LaserJet 4, the printer will display a "53.1X.08 ERROR" (X indicates the position of RAM In every instance the repair procedures for all products ...are not. Product Family Information The model HP C2021A is identical to the model HP C2001A from a hardware standpoint, as is the...
Service Manual
Page 105
... does not prohibit the use of the printer. The print quality of HP LaserJet cartridges influences the customer's perception of Non-HP toner cartridges during the warranty period or while under the HP warranty. The high print quality of HP LaserJet printers is from the use . Preventive Maintenance ...no control or process to ensure that image. • Repairs resulting from using different toner formulations found in maintaining that a Non-HP toner cartridge functions at the high level of reliability of an HP LaserJet toner cartridge. The reasons for the success of the product...
... does not prohibit the use of the printer. The print quality of HP LaserJet cartridges influences the customer's perception of Non-HP toner cartridges during the warranty period or while under the HP warranty. The high print quality of HP LaserJet printers is from the use . Preventive Maintenance ...no control or process to ensure that image. • Repairs resulting from using different toner formulations found in maintaining that a Non-HP toner cartridge functions at the high level of reliability of an HP LaserJet toner cartridge. The reasons for the success of the product...
Service Manual
Page 155
... Pad • Transfer Roller Replacement • Installing the Toner Cartridge Servicing the printer involves replacing printed circuit and electro-mechanical assemblies. Do not repair component failures within these areas to prevent damage during re-assembly. Caution Power-off the printer and disconnect the power cord from the beginning. Removal and replacement of the...
... Pad • Transfer Roller Replacement • Installing the Toner Cartridge Servicing the printer involves replacing printed circuit and electro-mechanical assemblies. Do not repair component failures within these areas to prevent damage during re-assembly. Caution Power-off the printer and disconnect the power cord from the beginning. Removal and replacement of the...
Service Manual
Page 157
... to metal when good electrical contact is needed. If a self-tapping screw-hole strips, repair of the screw-hole or replacement of the affected assembly is located and replace each type of the printer. Typically, plated screws are used in all other areas of screw is required. In the...first turn clockwise to help determine where each one into its original location. Removal and Replacement 6-3 Table 6-2 describes the screws used in the printers, and provides guidelines to tighten. The screws can vary in length depending on the thickness of screws you must remove. Table...
... to metal when good electrical contact is needed. If a self-tapping screw-hole strips, repair of the screw-hole or replacement of the affected assembly is located and replace each type of the printer. Typically, plated screws are used in all other areas of screw is required. In the...first turn clockwise to help determine where each one into its original location. Removal and Replacement 6-3 Table 6-2 describes the screws used in the printers, and provides guidelines to tighten. The screws can vary in length depending on the thickness of screws you must remove. Table...
Service Manual
Page 254
Test the repair after each replacement. 1 Reseat all connectors in the order given. Lower Cassette Functional Check When troubleshooting a Lower Cassette failure, always prove the failure by removing the Lower Cassette from the printer. After the failure has been associated with the Lower ...Controller. 7-24 Troubleshooting Replacement parts for removing and replacing the Lower Cassette components are listed in Chapter 6. Next, test the printer's ability to move and print media satisfactorily without the Lower Cassette installed. The Lower Cassette is a field-serviceable item. The ...
Test the repair after each replacement. 1 Reseat all connectors in the order given. Lower Cassette Functional Check When troubleshooting a Lower Cassette failure, always prove the failure by removing the Lower Cassette from the printer. After the failure has been associated with the Lower ...Controller. 7-24 Troubleshooting Replacement parts for removing and replacing the Lower Cassette components are listed in Chapter 6. Next, test the printer's ability to move and print media satisfactorily without the Lower Cassette installed. The Lower Cassette is a field-serviceable item. The ...
Service Manual
Page 255
If the contacts are dirty or damaged, clean the contacts after the repair. 3 Replace the High Voltage Power Supply. 4 Check and reseat the HVPS cable. 5 Replace the DC Controller. 16 Toner Low Message The TONER LOW message results ... by shaking or replacing the Toner Cartridge, perform the steps listed for troubleshooting the 14 NO EP CART message. 14 NO EP CART Message The printer detects the presence of the Toner Cartridge and the level of toner present in the cartridge cavity falls past the minimum level. Troubleshooting 7-25 Troubleshoot...
If the contacts are dirty or damaged, clean the contacts after the repair. 3 Replace the High Voltage Power Supply. 4 Check and reseat the HVPS cable. 5 Replace the DC Controller. 16 Toner Low Message The TONER LOW message results ... by shaking or replacing the Toner Cartridge, perform the steps listed for troubleshooting the 14 NO EP CART message. 14 NO EP CART Message The printer detects the presence of the Toner Cartridge and the level of toner present in the cartridge cavity falls past the minimum level. Troubleshooting 7-25 Troubleshoot...
Service Manual
Page 281
..., dirty, or missing? Table 7-29 High Voltage System Checks Checks Action Are the connectors for the printer's electro-photographic processes. Troubleshooting 7-51 A summary of the major components of the high voltage system, is not repairable. Also check the Toner Cartridge. Visually inspect each item. If any are connected to power the High...
..., dirty, or missing? Table 7-29 High Voltage System Checks Checks Action Are the connectors for the printer's electro-photographic processes. Troubleshooting 7-51 A summary of the major components of the high voltage system, is not repairable. Also check the Toner Cartridge. Visually inspect each item. If any are connected to power the High...
Service Manual
Page 301
... be ordered through SMO. The parts listed are listed on 8-33. Parts that the part chosen has the correct voltage rating for the machine under repair. Figures referred to in this chapter (see Parts List, page 8-40). 8 Parts and Diagrams How To Use the Parts Lists The figures in the tables... throughout the chapter. Note Not all part numbers is included at the end of this chapter illustrate the major subassemblies and component parts of the HP LaserJet 4/4M, LaserJet 4 Plus/ 4M Plus, and LaserJet 5/5M/5N printers. Accessory Parts are the only orderable parts.
... be ordered through SMO. The parts listed are listed on 8-33. Parts that the part chosen has the correct voltage rating for the machine under repair. Figures referred to in this chapter (see Parts List, page 8-40). 8 Parts and Diagrams How To Use the Parts Lists The figures in the tables... throughout the chapter. Note Not all part numbers is included at the end of this chapter illustrate the major subassemblies and component parts of the HP LaserJet 4/4M, LaserJet 4 Plus/ 4M Plus, and LaserJet 5/5M/5N printers. Accessory Parts are the only orderable parts.
Service Manual
Page 397
... when there is a question of RAM (2 MBytes for all LaserJet 4+ and LaserJet 5 printers products are very similar. Some LaserJet 4+ accessories are compatible with the LaserJet 5/5M/5N and some are very similar from a hardware service standpoint. In every instance the repair procedures for the C3917A) The model HP C3952A adds a 10-baseT MIO card to 35,000...
... when there is a question of RAM (2 MBytes for all LaserJet 4+ and LaserJet 5 printers products are very similar. Some LaserJet 4+ accessories are compatible with the LaserJet 5/5M/5N and some are very similar from a hardware service standpoint. In every instance the repair procedures for the C3917A) The model HP C3952A adds a 10-baseT MIO card to 35,000...