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Mutoh DH-40275 Dual Printhead Kit (DG-49581 / DG-43345) for VJ-1638 2638
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$1,390.00
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Factory-original Mutoh DH-40275 (superseding DG-49581, DG-43345) DX7 printhead kit with bracket base for Mutoh ValueJet 1638, 1938, and 2638 dual-head printers.
OEM Wide-Format Dual-Head Production Component
Original Mutoh DX7 Dual Printhead Assembly (DH-40275 / DG-49581 / DG-43345)
OEM Part Number: DH-40275 (Factory Supersession: DG-49581 / DG-43345 / DG-43314) | MicroPiezo DX7 Drop-on-Demand (DoD) Staggered Array Eco-Solvent & Sublimation Printhead Module
ValueJet Dual-Head Staggered Architecture & Part Number Supersession Notice
The Mutoh DH-40275 Printhead Assembly represents the latest official factory release superseding historical catalog numbers DG-49581, DG-43345, and DG-43314. Engineered specifically for Mutoh’s flagship dual-head staggered production presses—the ValueJet 1638, 1638X, 1638W, 1638WX, 1938WX, 2638, and 2638X—this assembly is factory-programmed with authentic Mutoh dual-carriage encryption parameters. Built with solvent-passivated internal cavity channels, reinforced manifold seals, and an electroformed anti-wetting faceplate, it is optimized for genuine Mutoh Eco-Ultra, Universal Mild Solvent (UMS), and high-speed water-based dye sublimation inks.
Product Overview
The Original Mutoh DH-40275 / DG-43345 DX7 Printhead Assembly is an industrial drop-on-demand (DoD) piezoelectric printhead designed for continuous high-throughput commercial signage, fleet wraps, exhibition displays, banners, soft signage, and apparel sublimation. Operating within the dual-staggered carriage array of VJ-1638 and VJ-2638 platforms, this module functions as Head 1 or Head 2, doubling the effective print swathe coverage per scan pass to deliver commercial speeds up to 94 m²/h (1,012 sq ft/hr).
Configured with 1,440 active addressable nozzles across 8 parallel lines (180 nozzles per line), the printhead achieves native optical output resolutions up to 1440 DPI. Leveraging advanced Variable Sized Droplet Technology (VSDT), it dynamically modulates droplet volumes from an ultra-fine 3.5 picoliters up to 21 picoliters. This dynamic volume control synchronizes directly with Mutoh’s Intelligent Interweaving (i²) wave printing algorithms, eliminating horizontal banding while yielding smooth continuous-tone gradations, dense solid fills, and razor-sharp 2-point vector micro-text.
Part Information
| Product Name | Original Mutoh ValueJet DX7 Dual Printhead Assembly |
| OEM Manufacturer | Mutoh Industries Ltd. / Epson MicroPiezo Core (Japan) |
| Current OEM Part Number | DH-40275 |
| Superseded / Interchangeable Codes | DG-49581 / DG-43345 / DG-43314 |
| Printhead Generation | MicroPiezo DX7 (Mutoh Dual-Head Encrypted Architecture) |
| Component Classification | Industrial Drop-on-Demand (DoD) Piezoelectric Multi-Channel Printhead |
| Carriage Allocation Versatility | Universal Bay: Mounts in Head 1 or Head 2 positions in dual-staggered carriages |
| Channel Versatility | Configurable for Dual CMYK (2 × 4 channels) or Expanded 8-Color Sets |
| Ink Chemistry Pairing | Mutoh Eco-Ultra, Universal Mild Solvent (UMS), Mild Solvent, & Aqueous Dye Sublimation Inks |
| Country of Origin | Japan (100% Genuine Original, Sealed Factory Packaging) |
Technical Specifications
| Actuation Physics | Industrial MicroPiezo Drop-on-Demand (PZT Actuator System) |
| Active Addressable Nozzles | 1,440 nozzles total (8 parallel rows × 180 nozzles per line) |
| Carriage Architecture | Dual-Head Staggered Array (Head 1 & Head 2 firing in tandem) |
| Native Optical Resolution | 1440 DPI (180 DPI per nozzle line / 360 DPI dual-channel interleaved) |
| Firing Frequency | 8 kHz nominal continuous firing frequency |
| Droplet Size Modulation | Variable Sized Droplet Technology (VSDT): 3.5 pl (minimum) up to 21 pl (maximum) |
| Effective Print Swath Width | 25.4 mm (1.0 inch) active swathe per unit (~50.8 mm combined staggered coverage) |
| Fluid Interface Manifold | 8 solvent-passivated manifold inlet ports matched to ValueJet DX7 damper lines |
| Electrical Interface | Dual high-density flat flexible cable (FFC) socket array with integrated chassis grounding tags |
| Operating Temperature & Humidity | 18°C to 30°C (64°F to 86°F); 35% to 65% RH non-condensing |
| Dimensions & Net Weight | 106 × 49.7 × 41.7 mm; Net weight: ~98 g / Packaged gross weight: ~0.24 kg |
Key Features & Operational Advantages
- Dual-Head Staggered Architecture: Firing synchronously in tandem within VJ-1638/2638 carriages, it doubles swath coverage per scan pass to achieve commercial speeds up to 94 m²/h.
- Authentic Mutoh Firmware Encryption: Factory-coded with authentic Mutoh encryption parameters, ensuring direct synchronization with dual-carriage head boards without communication timeouts.
- Solvent-Resistant Cavity Passivation: Fortified epoxy bonding and internal passivations resist aggressive Eco-Ultra glycol ethers and UMS diluents, preventing cavity delamination and cross-channel bleed.
- Direct Drop-In OEM Fitment: Built to exact Mutoh factory dimensions, restoring original droplet trajectory and carriage height parallelization without bracket modifications.
CRITICAL TECHNICAL & SERVICE ADVISORY
1. Dual-Head (DH-40275 / DG-43345) vs. Single-Head (DH-40274 / DG-43988) Differentiation: The DH-40275 is specifically designated for ValueJet dual-head staggered platforms (VJ-1638, VJ-1638X, VJ-2638). While mechanically similar to the single-head DX7 (DH-40274), pairing and firmware communication on dual-head boards require this specific assembly. Always confirm the machine model number and carriage station before opening the packaging.
2. Dual-Head Slant & Registration Calibration: In the VJ-1638/2638 dual-head carriage array, head replacement requires physical dial-indicator mechanical leveling followed by software calibration via the Mutoh Maintenance Engineer Software (`MSA`). Re-register the head rank ID values and run the inter-head alignment patterns across all print modes to prevent overlapping and white gaps.
3. Mandatory FFC Cable & Damper Servicing: Always install brand-new flat flexible head data cables (FFC) and new DX7 dampers concurrently. Bent, frayed, or ink-contaminated ribbon cable pins will short-circuit internal piezo driver transistors, instantly destroying mainboard driver ICs and onboard fuses.
4. Faceplate Maintenance Precautions: Never wipe the delicate orifice faceplate with dry shop wipes or coarse paper towels. Clean only using approved lint-free foam swabs moistened with genuine Mutoh Eco-Ultra or dedicated cleaning solution. Regularly inspect and clean the rubber capping station seals and wiper blades to avoid dried solvent ink build-up along the nozzle row.
Compatible Models & Systems
| Series / Lineup | Compatible Printer Models | Carriage Configuration |
|---|---|---|
| Mutoh ValueJet 1638 Series | ValueJet 1638 (VJ-1638), ValueJet 1638X | 64-inch High-Speed Production (Dual DX7 Staggered) |
| Mutoh ValueJet 2638 Series | ValueJet 2638 (VJ-2638), ValueJet 2638X | 102-inch Grand-Format Production (Dual DX7 Staggered) |
| Mutoh ValueJet Sublimation Series | VJ-1638W, VJ-1638WX, VJ-1938WX | High-Speed Transfer Sublimation (Dual DX7 Staggered) |
| Mutoh ValueJet 1624 Series (Reference) | VJ-1324, VJ-1324X, VJ-1624, VJ-1624X | Incompatible: Single-head series uses DH-40274 (DG-43988) |
| Mutoh ValueJet 1618 (Reference) | VJ-1618, VJ-1618W | Incompatible: Previous dual-head series uses DX5 head DG-41914 |
| Mutoh ValueJet 1638UR (Reference) | VJ-1638UR, VJ-1638UH | Incompatible: UV-LED models require dedicated UV DX7 head DG-45279 |
*Model Differentiation Note: Specifically engineered for Mutoh ValueJet 1638, 1638X, 1638W, 1638WX, 1938WX, 2638, and 2638X dual-head platforms. Confirm machine model number and part code prior to unpacking.
Terms, Warranty & Customer Protection
Condition: 100% Brand New, Genuine OEM Factory-Original Mutoh replacement printhead assembly in sealed factory packaging with shipping preservation fluid intact.
Manufacturer Warranty: Covered under standard OEM parts limited warranty against material and manufacturing defects out-of-box prior to ink introduction. No warranty applies once active solvent/sublimation ink or flush fluid has been introduced into the micro-fluidic chambers, or if damage results from head strikes, media crashes, electrostatic discharge, or improper cable seating.
Return Policy: Precision industrial electronic component. Unopened, factory-sealed boxes with intact tamper-evident seals are eligible for standard commercial return. Once the vacuum seal is broken, protective nozzle tape removed, or the head mounted onto a carriage frame, returns cannot be accepted due to fluid priming, static risk, and electrical contamination hazards.
DH-40275
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