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HP LaserJet 5L and 6L Printer (C3941/C3990) Service Manual
Copyright© 1997
Hewlett Packard Co.
Printed in USA 9/97
HP LaserJet 5L and 6L Printer
Manual Part No.
C3990-90991
Service Manual
*C3990-90991*
*C3990-90991*
C3990-90991
Printed on
Recycled Paper
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Service Manual HP LaserJet 5L HP LaserJet 6L (C3941A) (C3990A)
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© Copyright Hewlett-Packard Warranty WARNING Company 1997 The information contained in Electrical Shock Hazard this document is subject to All Rights Reserved. change without notice. To avoid electrical shock, use Reproduction, adaptation, or only supplied power cords and translation without prior Hewlett-Packard makes no connect only to properly written permission is warranty of any kind with grounded (3-hole) wall outlets. prohibited, except as allowed regard to this material, under the copyri
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Conventions This manual uses the following conventions: Color is used to emphasize items which are important to the material under discussion. The names of major printer parts and assemblies are CAPITALIZED. Bold is used for emphasis, particularly in situations where italic type would be confusing. Italic type is used to indicate related documents or emphasis. Note Notes contain important information set off from the text. Caution Caution messages alert you to the possibility of damage to equipm
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Chapter Descriptions 1 Product Information Orientation to the printer, as well as the service and repair philosophy, is discussed. Information on obtaining assistance and warranty is also here. 2 Site Requirements Here are recommendations pertaining to installation requirements. 3 Operating Overview This chapter has detailed information about the Control Panel. Sample self tests and printer reset information are also included. 4 Maintenance Turn to this chapter for information about printer clea
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List of Figures Figure 1-1 HP LaserJet 5L Model and Serial Numbers . . . . . . . . . . . . 1-4 Figure 1-2 HP LaserJet 6L Model and Serial Numbers . . . . . . . . . . . . . 1-5 Figure 1-3 Front/Side Views of the Printer . . . . . . . . . . . . . . . . . . 1-7 Figure 1-4 Front Door Assemblies . . . . . . . . . . . . . . . . . . . . . . 1-8 Figure 1-5 Back View of the Printer . . . . . . . . . . . . . . . . . . . . . . 1-9 Figure 2-1 Printer Space Requirements
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Figure 6-24 Pickup Roller Assembly Removal (2 of 2) . . . . . . . . . . . 6-28 Figure 6-25 Paper Pickup Roller Assembly Replacement (Inside/Front View) 6-29 Figure 6-26 Paper Feed Frame Removal (1 of 4) . . . . . . . . . . . . . . 6-30 Figure 6-27 Paper Feed Frame Removal (2 of 4) . . . . . . . . . . . . . . 6-31 Figure 6-28 Paper Feed Frame Removal (3 of 4) . . . . . . . . . . . . . . 6-32 Figure 6-29 Paper Feed Frame Removal (4 of 4) . . . . . . . . . . . . . . 6-3
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List of Tables Table 1-1 Printer Features . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Table 1-2 Paper Capacities and Sizes . . . . . . . . . . . . . . . . . . . . 1-3 Table 1-3 Performance Specifications . . . . . . . . . . . . . . . . . . . . 1-6 Table 1-4 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . 1-6 Table 1-5 Acoustic Emissions . . . . . . . . . . . . . . . . . . . . . . . . 1-6 Table 1-6 Related Docume
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1 Product Information Contents Printer Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Paper Capacities and Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Model and Serial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Specifications . . . . . . . . . . . . . . . . . . . . .
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1-2 Product Information
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Product 1 Information Printer Features Table 1-1 Printer Features Features Descriptions Print Speed 4 ppm (HP LaserJet 5L); 6 ppm (HP LaserJet 6L) Text & Graphics Resolution 300 or 600 dpi Printer Language Enhanced PCL 5 Monthly Usage (pages) 4,000 pages (HP LaserJet 5L); 6,000 pages (HP LaserJet 6L) Memory: 1 Standard 1 Mbyte RAM (70nsec) Maximum Memory 9 Mbyte total (available in increments of 1, 2, 4, and 8 Mbytes) 2 Capacity 5 V JEDIA card Internal Typefaces 26 Scalable Typefaces Standard In
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Identification Model and Serial The model number and serial numbers are listed on identification labels located on the bottom of the printer. The model number is alphanumeric, such as C3941A for the HP LaserJet 5L printer, and C3990A for the HP LaserJet 6L printer. The serial number contains information about the Country of Origin, the Revision Level, the Production Code, and production number of the printer. The labels also contain power rating and regulatory information. Figure 1-1 HP LaserJet
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Product 1 Information Figure 1-2 HP LaserJet 6L Model and Serial Numbers Product Information 1-5
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Specifications Table 1-3 Performance Specifications Category Specification Print Speed*: HP LaserJet 5L 4 ppm Print Speed*: HP LaserJet 6L 6 ppm Monthly Usage (Duty Cycle): HP LaserJet 5L 4,000 pages Monthly Usage (Duty Cycle): HP LaserJet 6L 6,000 pages Life Expectancy of Toner Cartridge (pages)** 2,500 pages @ 5% coverage First Print A4 <23 seconds Letter <23 seconds * Actual speed depends on data complexity and software handling efficiency. ** Toner cartridge life can be extended by using Eco
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Product 1 Information Product Overview Figure 1-3 Front/Side Views of the Printer 1. Paper Input Support 7. Front Panel Button 13. Front Output Slot (face-up) 2. Paper Output Support 8. Paper Output Bin 3. Paper Guides 9. Paper Path Lever 4. Error (top) Light 10. Serial and Model Number (under printer) 5. Data (middle) Light 11. Paper Input Bin 6. Ready (bottom) Light 12. Single Sheet Input Slot Product Information 1-7
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Figure 1-4 Front Door Assemblies 14. Paper Release Lever 16. Transfer Roller (do not touch) 15. Toner Cartridge Compartment 17. EP Door 1-8 Product Information
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Product 1 Information Figure 1-5 I Back View of the Printer 18. Power Cable Connector 20. Memory Expansion Cover 19. Parallel Cable Connector Product Information 1-9
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Service Approach Repair of the printer normally begins with the use of the printer’s internal diagnostics in conjunction with the troubleshooting procedures in Chapter 7. Once a faulty part is located, repair is generally accomplished by assembly level replacement of Field Replaceable Units (FRUs). Some mechanical assemblies may be repaired at the subassembly level. PCA component replacement is not supported by Hewlett-Packard. Part numbers for all FRUs are located in Chapter 8 of this manual. P
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Product 1 Information Table 1-6 Related Documentation Description Part Number PDO PCE HPD HP LaserJet Family Quick Reference 5021-0369 X X Service Guide HP LaserJet 5L Printer C3941-90901 X User’s Manual HP LaserJet 6L Printer C3990-90901 X User’s Manual HP PCL5 Printer Language Technical 5010-3994 X X Reference Information Package HP LaserJet Printer Family Paper 5021-0368 X X X Specifications Guide LaserJet Basic Hardware Training Course 5961-0880 X X HPLJ 5L and 6L Hardware Training Kit C3990
