Service Manual
Page 16
... ERROR" (X indicates the position of accessory compatibility. Some LaserJet 4 accessories are compatible with the LaserJet 4 Plus and some are similar. The models HP C2021A and C2039A printers include the following features: • PostScript Level 2 SIMM • AppleTalk MIO Card • 4 MBytes of RAM In every instance the repair procedures for all products are not. Yes Yes...
... ERROR" (X indicates the position of accessory compatibility. Some LaserJet 4 accessories are compatible with the LaserJet 4 Plus and some are similar. The models HP C2021A and C2039A printers include the following features: • PostScript Level 2 SIMM • AppleTalk MIO Card • 4 MBytes of RAM In every instance the repair procedures for all products are not. Yes Yes...
Service Manual
Page 105
...Hewlett-Packard has no control over the actual print quality of the printer. Preventive Maintenance 4-9 The high print quality of HP LaserJet printers is from the use . The reasons for the success of an HP LaserJet toner cartridge. Hewlett-Packard also cannot predict what the long term ...reliability effect on the printer is one of the primary reasons for this are keenly interested in Non-HP cartridges. • Hewlett-Packard has no control or process to ensure that image. • Repairs...
...Hewlett-Packard has no control over the actual print quality of the printer. Preventive Maintenance 4-9 The high print quality of HP LaserJet printers is from the use . The reasons for the success of an HP LaserJet toner cartridge. Hewlett-Packard also cannot predict what the long term ...reliability effect on the printer is one of the primary reasons for this are keenly interested in Non-HP cartridges. • Hewlett-Packard has no control or process to ensure that image. • Repairs...
Service Manual
Page 155
... especially susceptible to Electrostatic-Static Discharge (ESD). Caution Power-off the printer and disconnect the power cord from the beginning. Note The printer contains parts that must be performed before servicing the printer. This symbol: appears in Chapter 4, "Preventive Maintenance." These items include... instances, replace the failed assembly. Some sheet metal edges, particularly around the formatter cage, are provided. Do not repair component failures within these areas to prevent damage during re-assembly. Be careful when working in the order listed to avoid...
... especially susceptible to Electrostatic-Static Discharge (ESD). Caution Power-off the printer and disconnect the power cord from the beginning. Note The printer contains parts that must be performed before servicing the printer. This symbol: appears in Chapter 4, "Preventive Maintenance." These items include... instances, replace the failed assembly. Some sheet metal edges, particularly around the formatter cage, are provided. Do not repair component failures within these areas to prevent damage during re-assembly. Be careful when working in the order listed to avoid...
Service Manual
Page 157
...and replace each type of screw is needed. Do not over-tighten. If a self-tapping screw-hole strips, repair of the screw-hole or replacement of the printer. Caution To install a self-tapping screw, first turn it counter-clockwise to align it with lock and flat washer... PURPOSE Used to fasten metal or plastic to tighten. Table 6-2 Printer Hardware Descriptions DRAWING DESCRIPTION Threaded Phillips screw with the existing thread pattern, then carefully turn clockwise to threaded plastic or metal. Removal and ...
...and replace each type of screw is needed. Do not over-tighten. If a self-tapping screw-hole strips, repair of the screw-hole or replacement of the printer. Caution To install a self-tapping screw, first turn it counter-clockwise to align it with lock and flat washer... PURPOSE Used to fasten metal or plastic to tighten. Table 6-2 Printer Hardware Descriptions DRAWING DESCRIPTION Threaded Phillips screw with the existing thread pattern, then carefully turn clockwise to threaded plastic or metal. Removal and ...
Service Manual
Page 254
...Functional Check When troubleshooting a Lower Cassette failure, always prove the failure by removing the Lower Cassette from the printer. Next, test the printer's ability to move and print media satisfactorily without the Lower Cassette installed. After the failure has been associated ... Replace the Paper Control PCA. 4 Replace the DC Controller. 7-24 Troubleshooting The Lower Cassette is a field-serviceable item. Test the repair after each replacement. 1 Reseat all connectors in the order given. Replacement parts for removing and replacing the Lower Cassette components are listed in...
...Functional Check When troubleshooting a Lower Cassette failure, always prove the failure by removing the Lower Cassette from the printer. Next, test the printer's ability to move and print media satisfactorily without the Lower Cassette installed. After the failure has been associated ... Replace the Paper Control PCA. 4 Replace the DC Controller. 7-24 Troubleshooting The Lower Cassette is a field-serviceable item. Test the repair after each replacement. 1 Reseat all connectors in the order given. Replacement parts for removing and replacing the Lower Cassette components are listed in...
Service Manual
Page 255
... level of toner in the cartridge through the condition of the ANTIN signal. 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 as follows: 1 Reseat the Toner Cartridge. 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.
... level of toner in the cartridge through the condition of the ANTIN signal. 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 as follows: 1 Reseat the Toner Cartridge. 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.
Service Manual
Page 281
... High Voltage Power Supply Assembly. Table 7-29 High Voltage System Checks Checks Action Are the connectors for the printer's electro-photographic processes. Also check the Toner Cartridge. The +24B VDC supply is not repairable. Are the HVPS connections bent or broken? High Voltage Power Supply Assembly The High Voltage Power Supply Assembly...
... High Voltage Power Supply Assembly. Table 7-29 High Voltage System Checks Checks Action Are the connectors for the printer's electro-photographic processes. Also check the Toner Cartridge. The +24B VDC supply is not repairable. Are the HVPS connections bent or broken? High Voltage Power Supply Assembly The High Voltage Power Supply Assembly...
Service Manual
Page 301
...an eight-week lead time. Note Not all part numbers is included at the end of the HP LaserJet 4/4M, LaserJet 4 Plus/ 4M Plus, and LaserJet 5/5M/5N printers. Part numbers with an S in the Notes column are the only orderable parts. An alphanumeric ...index referencing all parts are not field-replaceable and cannot be ordered through SMO. Parts that the part chosen has the correct voltage rating for the machine under repair...
...an eight-week lead time. Note Not all part numbers is included at the end of the HP LaserJet 4/4M, LaserJet 4 Plus/ 4M Plus, and LaserJet 5/5M/5N printers. Part numbers with an S in the Notes column are the only orderable parts. An alphanumeric ...index referencing all parts are not field-replaceable and cannot be ordered through SMO. Parts that the part chosen has the correct voltage rating for the machine under repair...
Service Manual
Page 397
.../5N and some are very similar. LaserJet 5/5M/5N Printer B-3 Features Interfaces MIO Slots EconoMode Cartridge Slot Power Save Monthly Usage (pages) HP LJ 4+ HP LJ4M+ HPLJ5 HPLJ5M Serial (9 pin) Parallel 1 Yes Serial (9 pin) Parallel Local Talk Serial (9 pin) Parallel Local Talk Ethernet Serial Infrared***...,000 HPLJ5N Serial (9 pin) Parallel 10-baseT Serial Infrared*** 1 Yes No Yes Up to the base C3916A printer. In every instance the repair procedures for the C3917A) The model HP C3952A adds a 10-baseT MIO card to 35,000 *The PostScript upgrade requires an additional 4 MB SIMM. ...
.../5N and some are very similar. LaserJet 5/5M/5N Printer B-3 Features Interfaces MIO Slots EconoMode Cartridge Slot Power Save Monthly Usage (pages) HP LJ 4+ HP LJ4M+ HPLJ5 HPLJ5M Serial (9 pin) Parallel 1 Yes Serial (9 pin) Parallel Local Talk Serial (9 pin) Parallel Local Talk Ethernet Serial Infrared***...,000 HPLJ5N Serial (9 pin) Parallel 10-baseT Serial Infrared*** 1 Yes No Yes Up to the base C3916A printer. In every instance the repair procedures for the C3917A) The model HP C3952A adds a 10-baseT MIO card to 35,000 *The PostScript upgrade requires an additional 4 MB SIMM. ...