1998 HP LaserJet 8000 / 8000 N / 8000 DN / Mopier 240 Service Manual (610 P.)
Factory service documentation for LaserJet 8000 series covering diagnostics, paper path troubleshooting, fuser replacement, and DC controller repair with exploded diagrams.
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Sample pages from the 1998 HP LaserJet 8000 / 8000 N / 8000 DN / Mopier 240 Service Manual (610 P.) manual
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Models Covered & Key Technical Specifications
HP LaserJet 8000, 8000 N, 8000 DN, HP Mopier 240 (C4085A, C4086A, C4087A, C4228A) — 1998
Digital Precision Repository | LaserJet 8000 Series Module.
- Maximum Form Factor: 21.30 × 46.75 × 20.50 inches is measured at the complete chassis dimensions Matrix.
- Authorized Output Quality: For optimal performance, 24 pages per minute maintains the letter/A4 print speed Standards.
- Established Fastener Specs: 2.5-3.0 N·m produces the required tightening torque for assembly screws Margin.
- Measured Tolerance Values: The registration gap requires 0.5 mm (0.02 inch) for tray alignment accuracy Protocol.
- Critical Amperage Specs: 120V operation limits 13.5 amperes maximum current draw Architecture.
- Rated Unit Dimensions: Fuser temperature delivers 190° C (392° F) for image bonding process Norms.
Professional Workshop Service Manual & Technical Specifications
Operational Repair Shop Manual: Printer HP LaserJet 8000 / 8000 N / 8000 DN / Mopier 240 Service Manual (528 P.) Information-Suite
Design-Core: HP LaserJet 8000 Series (1998) // Unit-Designations: Electrophotographic / Image Formation Logic // Maintenance-Category: 610-page technical protocol documentation.
| Service-Nexus | Value | Calibration-Data |
|---|---|---|
| Document Overview | 528 pages | Complete specifications provided |
| Chapter Structure | 8 primary sections | Functional diagrams documented |
| Technical Scope | Printer and accessories | Service procedures included |
Outlining the operational framework across Preventative Maintenance and Adjustments documentation, Chapter 4 describes Cleaning and Preventive Maintenance, Chapter 6 presents Removal and Replacement procedures, Chapter 7 covers Troubleshooting methodologies, and Chapter 5 details Functional Overview systems.
Parts identification is covered for the DC Controller System, controlling laser and scanner drive circuits, paper motion monitoring through photosensors and flags, clutches for registration and tray pickup, and the engine test microswitch functionality. The document includes the Image Formation System comprised of six discrete steps: drum cleaning, drum conditioning, image writing, image development, image transferring with media separation, and image fusing. The manual provides functional block diagrams illustrating signal paths, control mechanisms, and media routing through the 600 x 600 dpi resolution system.
Removal procedures are documented for field replaceable units including the Formatter Assembly, Fusing Assembly, Laser/Scanner Assembly, Transfer Roller Assembly, and paper input units. The toner cartridge specifications reference a 15,000-page yield at 5% coverage, incorporating the photosensitive drum with organic-photoconductive coating and primary charging roller assembly. Technical specifications are provided for the four-fan cooling system: laser/scanner exhaust, low-voltage power supply exhaust, formatter intake, and standard output delivery configurations.
Factory specifications are documented for the power distribution system generating +5V DC, +12V DC, and +24V DC outputs from the low-voltage power supply, with high-voltage circuits applying DC-biased AC voltage to the primary charging roller and developing roller. The manual documents torque specifications for chassis fasteners to ensure proper vibration dampening. Engine rebuild procedures are documented for the main gear assembly, main motor assembly rated for 24 ppm letter/A4 output, registration assembly with clutch mechanisms, and paper input unit featuring automatic size-sensing switches SW1601 through SW1604.
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