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Seiko ColorPainter H2-74S / H2-104S High-Speed Printhead
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$4,250.00
$1,785.00
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Authentic high-frequency piezoelectric printhead optimized for high-speed commercial production in Seiko ColorPainter H2-series printers.
OEM Replacement Component
Seiko ColorPainter H2-74S / H2-104S High-Speed Industrial Printhead (12 pL)
OEM Part Number: U00135359000 / IP6-221 (Seiko 508GS High-Speed Calibration) | Genuine High-Velocity Greyscale Piezoelectric Jetting Assembly
Product Overview
The Seiko ColorPainter H2-74S / H2-104S Printhead (OEM Part Number U00135359000 / Service Kit IP6-221, manufactured on the reinforced Seiko Instruments 508GS high-speed platform) is an authentic original equipment manufacturer piezoelectric drop-on-demand (DoD) replacement printhead engineered specifically for the second-generation Seiko I Infotech (SIIT) ColorPainter H2 series grand-format solvent production systems. Featuring an interleaved dual-row matrix of 508 active nozzles across an active 71.8 mm print swath, this assembly delivers true multi-drop greyscale imaging starting from a native 12 picoliter (pL) base droplet size up to 48 pL composite drops across a native 180 DPI channel pitch.
Constructed around Seiko’s isolated PZT shear-mode piezoelectric architecture and shielded by a chemically bonded stainless steel nozzle guard plate, the H2-series printhead is optimized for the accelerated carriage speeds and dynamic duty cycles of the H2 platform. Built to operate seamlessly with GX and high-density mild-solvent ink chemistry, the printhead integrates an internal electric heating block and precision thermistor for closed-loop thermal regulation. This maintains stable fluid viscosity and high jet straightness during intensive production runs exceeding 100 m²/h (1,076 sq ft/h) at resolutions up to 900 DPI.
Part Information
| Product Name | Seiko ColorPainter H2-74S / H2-104S Solvent Printhead |
| OEM Manufacturer | Seiko Instruments Inc. (SII Printek) / Seiko I Infotech (SIIT) |
| OEM Part Numbers | U00135359000 / IP6-221 (Seiko 508GS High-Speed Platform) |
| Component Classification | Original Equipment Manufacturer (OEM) High-Velocity Greyscale Line Head |
| Actuation Architecture | Isolated PZT Shear-Mode Piezo Matrix with Stainless Steel Nozzle Guard Plate |
| Manufacturing Standard | Seiko Instruments Factory Certified (Japan) |
Technical Specifications
| Printhead Technology | Piezoelectric Drop-on-Demand (DoD) Multi-Drop Greyscale |
| Number of Active Nozzles | 508 addressable channels (interleaved dual-row configuration) |
| Native Resolution / Pitch | 180 DPI native nozzle pitch (prints up to 900 DPI via multi-pass interlacing) |
| Active Print Swath Width | 71.8 mm (2.82 inches) |
| Native Base Drop Volume | 12 picoliters (pL) native calibrated droplet |
| Greyscale Drop Range | 12 to 48 pL (up to 4 greyscale levels via multi-pulse sub-drop merging) |
| Maximum Operating Frequency | Up to 30 kHz greyscale (calibrated for H2 high-velocity drive waveforms) |
| Operating Viscosity Range | 8 to 14 mPa·s (cP) at operating jetting temperature |
| Temperature Regulation | Up to 50°C (122°F) via integrated internal heater and high-precision thermistor |
| Fluid Compatibility | Seiko GX / GX300 low-odor solvent inks, mild solvent, eco-solvent formulations |
| Fluid & Electrical Interfaces | Direct damper push-in fluid coupling; multi-pin Flexible Flat Cable (FFC) connector port |
Key Features & Operational Advantages
- High-Speed H2 Waveform Tuning: High-frequency drive capability supports the increased linear carriage speeds of the H2-74S and H2-104S, sustaining continuous production output up to 100 m²/h without drop deflection.
- Dynamic 12–48 pL Multi-Drop Greyscale: Combines 12 pL base micro-drops for fine linework, smooth gradients, and sharp text with composite drops up to 48 pL for high-density solid fills on vinyl and banners.
- Reinforced Stainless Steel Faceplate: Metallic nozzle faceplate protects the internal ceramic jet array from physical head strikes, automated silicone wiper wear, and aggressive maintenance flushes.
- Closed-Loop Thermal Stability: Internal electric heating elements and onboard thermistors stabilize ink temperature, preventing drop velocity decay and banding caused by ambient room temperature fluctuations.
CRITICAL TECHNICAL & OPERATIONAL ADVISORY
1. Mandatory ESD Grounding & Power Isolation: Piezo PZT crystals and logic shift registers are Class 1 ESD-sensitive components. Technicians must wear a grounded ESD wrist strap. Always turn off the printer's main power switch and disconnect AC power cords prior to unplugging or reseating FFC ribbon cables; hot-plugging will instantaneously destroy the carriage board and head electronics.
2. Voltage Rank Parameter Entry: Before physical installation, locate and record the factory rank voltage printed on the printhead casing or rank barcode label. Enter this specific voltage rank into the printer maintenance software via the SIIT Service Tool to prevent over-voltage burnout or weak drop ejection.
3. Damper & O-Ring Replacement: Never reuse old ink dampers when installing a new H2 printhead. Contaminated or worn damper screens can introduce micro-debris into the intake manifold, causing immediate nozzle deflection. Always install a new OEM solvent damper and solvent-resistant O-ring.
4. Orifice Plate Maintenance & Capping: Never wipe the stainless steel nozzle plate with dry cloth, paper towels, or abrasive materials. Use only lint-free polyurethane cleanroom swabs wetted with genuine Seiko flush solvent. Ensure capping station wiper blades and rubber cap tops are clean and supple to prevent air leaks and dried ink crusting during overnight capping.
Compatible Models & Systems
| Printer Manufacturer | Ink Chemistry | Supported Platforms |
|---|---|---|
| Seiko I Infotech (SIIT) H2 Series | GX / GX300 Low-Odor Solvent | ColorPainter H2-74S (74-inch), ColorPainter H2-104S (104-inch) |
| Seiko I Infotech (SIIT) H Series | GX Low-Odor Solvent | ColorPainter H-74S, ColorPainter H-104S (Backward Compatible) |
| Oki Data Infotech H2 Series | Low-Odor Mild Solvent | Oki ColorPainter H2-74S / H2-104S Platforms |
*Model Differentiation Note: This printhead is dedicated to the high-speed ColorPainter H2 series (OEM part # U00135359000 / IP6-221). While backward compatible with first-generation H-74S / H-104S units, it is NOT compatible with earlier 254-nozzle ColorPainter 64S / 100S heads (SPT255 platform, Part # U00088939000), nor successor ColorPainter M-64S / W-64S / W-54S heads (which use RC1536 recirculation heads). Verify the part number and carriage slot geometry prior to unsealing.
Terms, Warranty & Customer Protection
Condition: 100% Brand New, Unopened Factory Original Genuine OEM Component in Factory-Sealed Anti-Static Packaging with Factory Storage Fluid Intact.
Warranty Scope: Covered by standard manufacturer DOA replacement protection against electrical continuity failures and physical manufacturing defects upon initial arrival. Operating longevity and channel firing integrity are governed by ink filtration, degassing quality, correct waveform tuning, and routine maintenance compliance.
Return Policy: Precision industrial electronic consumable. Due to sensitivity to electrostatic discharge, internal fluid priming requirements, and contamination risks once unsealed, components that have been removed from their static-shielding bag, filled with ink, flushed with solvents, or energized cannot be returned or restocked under standard commercial terms. Please confirm your printer model and drop-volume specification with technical support prior to unsealing.
U00115822300
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