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Seiko ColorPainter M-64S Printhead
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Factory-original Seiko GX grayscale printhead assembly with integrated dampers for Seiko / OKI ColorPainter M-64S eco-solvent printers.
OEM Replacement Component
Seiko / OKI ColorPainter M-64S Industrial Solvent Printhead (12 pL)
OEM Part Number: U00139263400 / IP7-121 (Seiko 508GS / M-Series Platform) | High-Precision Greyscale Piezoelectric Jetting Assembly
Product Overview
The Seiko ColorPainter M-64S Printhead (OEM Part Number U00139263400 / Service Kit IP7-121, manufactured on the specialized Seiko Instruments 508GS high-definition platform) is an authentic original equipment manufacturer replacement piezoelectric drop-on-demand (DoD) industrial inkjet printhead engineered specifically for the Seiko I Infotech (SIIT) and OKI Data Infotech ColorPainter M-64S 64-inch high-productivity eco-solvent printer series. 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.
Engineered around Seiko’s isolated PZT shear-mode piezoelectric architecture and fitted with a high-durability stainless steel nozzle guard plate, the M-64S printhead is optimized to jet SX low-odor, high-viscosity eco-solvent inks and industrial SX grey/light-black ink formulations. It features integrated electric heating blocks and high-accuracy onboard thermistors for precise closed-loop thermal regulation, stabilizing ink viscosity across 6-color and 7-color staggered multi-head carriage configurations. This ensures sharp dot placement, smooth tonal gradations, and reliable jetting at high-speed production modes exceeding 66 m²/h (716 sq ft/h) at resolutions up to 900 DPI.
Part Information
| Product Name | Seiko ColorPainter M-64S Eco-Solvent Printhead |
| OEM Manufacturer | Seiko Instruments Inc. (SII Printek) / OKI Data Infotech |
| OEM Part Numbers | U00139263400 / IP7-121 (Seiko 508GS M-Series Calibration) |
| Component Classification | Original Equipment Manufacturer (OEM) Piezoelectric 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 28 kHz greyscale (M-64S Dynamic Dot Printing / DDP tuned) |
| 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 | OKI / Seiko SX low-odor eco-solvent inks, mild solvent, specialty grey inks |
| Fluid & Electrical Interfaces | M-64S damper push-in fluid coupling; multi-pin Flexible Flat Cable (FFC) connector port |
Key Features & Operational Advantages
- Dynamic Dot Printing (DDP) Synergy: Optimized drive waveform timing produces crisp 12 pL micro-droplets for fine vector detail alongside composite 48 pL drops for high-density vehicle wraps and backlit banners without graininess.
- Wide 71.8 mm Printline Swath: Enables high-speed multi-pass production modes on 64-inch roll media, sustaining commercial print volumes with consistent color density across 6-color (CMYK, Lc, Lm) and 7-color (with Grey) setups.
- Reinforced Stainless Steel Nozzle Shield: High-hardness metallic orifice faceplate protects the internal ceramic jet matrix from media cockle abrasion, automated wiper wear, and aggressive maintenance cleaning.
- Onboard Thermal Stabilization: Internal electric heating elements and sensitive thermistors eliminate viscosity fluctuations caused by ambient room variations, ensuring stable drop velocity and preventing banding.
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 OKI / SIIT Service Software Tool to prevent over-voltage burnout or weak drop ejection.
3. Damper & O-Ring Replacement: Never reuse old ink dampers when installing a new M-64S 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 OKI SX 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 |
|---|---|---|
| OKI Data Infotech / SIIT | SX Low-Odor Eco-Solvent | ColorPainter M-64S (6-Color & 7-Color Configurations) |
| OKI Data Infotech | SX Eco-Solvent | ColorPainter M-64S Traffic White / Grey Specialty Models |
*Model Differentiation Note: This printhead is dedicated strictly to the Seiko / OKI ColorPainter M-64S series (Part # U00139263400 / IP7-121). It is NOT interchangeable with earlier ColorPainter H-series / H2-series heads (Part # U00120194400 / U00135359000), ColorPainter 64S/100S heads (SPT255 platform), or ColorPainter W-64S / W-54S heads (which utilize water-based / aqueous printhead platforms). Always verify the part number on the box label 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.
U00130650601
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