2005 HP Color LaserJet 5500, 5500n, 5500dn, 5500dtn, 5500hdn Printer Service Manual (P/N C9656-90930)

HP service manual C9656-90930 (Edition 1, July 2002) covers the Color LaserJet 5500, 5500n, 5500dn, 5500dtn, and 5500hdn. It documents printer operation, maintenance, troubleshooting, and assembly-level repair.

• Printer architecture: Engine control, formatter, laser/scanner, and image-formation systems, with operating sequences and circuit explanations.

• Assembly replacement: Removal and replacement procedures for the fuser, electrostatic transfer/transport belt (ETB), laser/scanner units, formatter, power supplies, and drum drive assemblies.

• Paper handling: Pickup/feed unit, duplex path, and optional paper-feeder service, including rollers, separation pads, clutches, solenoids, and lifter drives.

• Fault isolation: Alphabetical and numerical error messages, power-on troubleshooting, sensor and component tests, and Print/Stop testing.

• Calibration and maintenance: Color plane registration, drum phase calibration, image stabilization, OHT sensor cleaning, and supply-counter reset procedures.

• Parts and diagrams: Exploded assembly views, illustrated parts lists, connector locations, wiring diagrams, repetitive defects rulers, and troubleshooting flowcharts.

Internal removal and replacement procedures are intended for authorized service personnel; troubleshooting assumes an understanding of color laser printing.

Model Configurations and Replacement Parts

Configuration differences: The 5500n is the Europe-only network model. Automatic duplex printing applies to the 5500dn, 5500dtn, and 5500hdn. The 5500dtn adds a paper feeder and stand; the 5500hdn adds a second feeder and hard disk. Network configurations use the HP Jetdirect 615N print server.

Parts selection: The assembly location diagram leads into exploded views and matching parts tables, supported by alphabetical and numerical indexes. Listings distinguish simplex and duplex formatters, along with voltage-specific fusers and power supplies, helping match replacement parts to the printer being serviced.

Paper-Path and Print-Quality Diagnosis

The Troubleshooting flowchart and Diagnostics flowchart address startup faults and engine/formatter operation. Paper Path Test settings help isolate tray-specific and duplex feeding problems, while the Print/Stop test helps locate where an image defect develops.

The repetitive defects rulers connect recurring marks with particular rollers, cartridges, the ETB, or the fuser. Cause-and-remedy tables address missing colors, streaks, poor fusing, smearing, and skewed images.

Sensor-state tables and individual component tests support checks of paper detection, cartridge drives, scanner motors, and feed mechanisms. The General circuit diagram and separate paper-feeder circuit diagram provide the electrical connections behind those checks.

Internal Service and Calibration

Engine-control explanations cover the DC controller, high- and low-voltage power supplies, and induction-heated fuser. Motor-function tables describe four-speed switching for the drum and ETB drives. Calibration sections explain DMAX image-density control, DHALF halftone control, color registration, and drum phase adjustment.

Replacement notes identify when Calibrate Now is required after controller, formatter, drive, ETB, or scanner work. Maintenance instructions also address the static discharge comb, OHT sensor, and counter resets when supplies are replaced before their normal end of life.

Repair limits: HP’s service approach centers on replacing field-replaceable units; it does not support component-level repairs on the circuit boards. Laser/scanner units are not field-adjustable and must not be disassembled.

Handling cautions: The laser/scanner procedure warns that omitting the support spacer can allow frame flex, skewing the laser beams and causing print defects. The formatter ribbon-cable warning addresses cable tears and connector damage associated with its brown locking tab.

Follow the manual’s electrical-isolation and laser-safety notices; the fuser can remain hot after power-off.

Selected Fuser Temperatures and Media Feed Speeds

These media-dependent settings are a small sample of the operating data included in the manual.

The fuser temperature table lists approximately 185°C (365°F) for plain paper and 152°C (306°F) for gloss media. Both figures describe fuser-sleeve operating temperatures for the selected media type.

Transparency feed settings distinguish quarter speed for full-color printing from half speed for monochrome. These entries show how media selection and print mode affect engine operation during troubleshooting.

Text Search, Bookmarks, and Circuit Detail

Navigation and diagram labels: Body text is searchable, with embedded bookmarks for the main chapters and numerous subsections. Labels within the general and paper-feeder circuit diagrams are not searchable. Small pin and connector markings require zooming.

The download is a single printable, English-language 408-page PDF. The total includes the cover, front matter, index, and blank pages.