HP DesignJet 1050C / 1055CM Service Manual (326 P.)
Service documentation for DesignJet 1050C (C6074A) and 1055CM (C6075A) with procedures for printhead alignment, ink delivery system, carriage assembly diagnostics, and calibrations.
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Sample pages from the HP DesignJet 1050C / 1055CM Service Manual (326 P.) manual
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Models Covered & Key Technical Specifications
HP DesignJet 1050C, DesignJet 1055CM (C6074A, C6075A) — 1998–2001
Procedural Technical Compendium | DesignJet 1050C/1055CM Series Kit.
- Approved Production Rate: 600 dpi printhead resolution is rated at four-color thermal inkjet output Architecture.
- Factory Physical Specs: For maximum throughput, 12.0 kHz nozzle fire frequency provides ejection control dynamics Margin.
- Verified Output Quality: Maximum carriage scan width is designed for 917 mm (36.1 inches) print area Protocol.
- Designated Fill Levels: The operating temperature range is specified as 15–35°C (59–95°F) for optimal performance Norms.
- Essential Assembly Gap: Printhead operational life expectancy supports 700 ml ink volume or 9,000 hours service duration Bounds.
- Operational Print Rate: Maximum power supply voltage is calibrated to 240 V ac (±10%) international compatibility Topology.
Professional Workshop Service Manual & Technical Specifications
Enhanced Performance Overhaul Manual: HP DesignJet 1050C / 1055CM Service Manual (326 P.) Engine-Compendium
Serial-Range: HP DesignJet 1050C, DesignJet 1055CM (C6074A, C6075A) — 1998–2001 // Specification-Class: Large-Format Inkjet / Four-Color Thermal Architecture // Serial-Range: 600 dpi printhead resolution, 12.0 kHz fire frequency dynamics, 917 mm maximum carriage width.
| Service-Nexus | Rating | Architecture |
|---|---|---|
| Troubleshooting Procedures | System Error Code Reference | Documented with corrective actions |
| Service Tests and Utilities | Electronic Systems Verification | Complete specifications provided |
| Calibration Procedures | Accuracy and Alignment Protocols | See Chapters 4-5 |
| Ink Delivery System | HP No.80 Supplies Management | Documented |
| Removal and Installation | Component-Level Procedures | Complete specifications provided |
| Print Quality Diagnostics | Banding and Color Alignment | See Chapter 6 |
| Preventive Maintenance | Scan-Axis Service Intervals | Documented |
Integrated service sections encompass Troubleshooting addresses System Error Codes, linking Electronic Systems references Service Tests and Utilities, referencing Calibration Procedures defines Accuracy calibrations, connecting Ink Delivery System examines HP No.80 Supplies protocols, and detailing Print Quality encompasses diagnostic workflows.
Service procedures are documented for troubleshooting system error codes ranging from EEROM test failures to ink pressure system malfunctions, providing corrective action sequences for continuable and non-continuable error conditions. The manual references service tests including electronic systems verification, EIO card diagnostics, hard disk drive validation, ink pressure system checks, scan-axis and paper-axis motor testing, and drop detector functionality assessments. Electrical system documentation covers power supply specifications rated at 100-240 V ac with maximum consumption of 200 watts, main electronics controlling motor and sensor networks, carriage assembly printhead interfaces, and front panel user interface components. Calibration requirements are specified for accuracy calibration using HP High Gloss Photo Paper to control media advance and prevent banding, line sensor intensity calibration for edge-detection functionality, service station alignment relative to carriage assembly positioning, roller mark encoder calibration, color-to-color alignment correction, and printhead alignment procedures requiring minimum A2 or C-size media.
Careful operation of the ink delivery system incorporates documentation of the modular architecture connecting large-capacity off-axis ink cartridges through permanently connected tubes to high-throughput printheads. The air pressurization system provides controlled pneumatic feedback with DC motor-driven pump, two-way solenoid valve, and analog pressure sensor maintaining minimum required ink pressure at printhead inlets during specified print rates. Disassembly instructions are documented for right hand cover removal requiring disconnection of front panel cable from position P16 and aerosol fan cable from position P7 on the electronics module, service station assembly secured by T-15 screws accessible between carriage assembly slider rods, trailing cable disconnection following specific left-to-right reconnection sequence to prevent internal electronics module fuse damage, and carriage assembly removal requiring tensioner spring compression using wedge clip and encoder strip release from retaining pins.
The manual documents torque specifications for the paper-axis motor assembly to ensure proper vibration dampening.
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