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Original Mutoh DX7 Printhead Assembly (DH-40274 / DG-49580 / DG-43988)
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Genuine OEM Mutoh DH-40274 (superseding DG-49580, DG-43988, DG-42987) DX7 printhead assembly for Mutoh VJ-628, VJ-1324, VJ-1624, VJ-1624W, and VJ-1924W.
OEM Wide-Format Eco-Solvent & Sublimation Component
Original Mutoh DX7 Printhead Assembly (DH-40274 / DG-49580 / DG-43988)
OEM Part Number: DH-40274 (Direct Factory Supersession: DG-49580 / DG-43988 / DG-42987) | 8-Channel MicroPiezo Drop-on-Demand (DoD) Piezoelectric Eco-Solvent / Dye Sublimation Printhead Module
ValueJet DX7 Series Architecture & Part Number Supersession Notice
The Mutoh DH-40274 Printhead Assembly represents the latest official factory release superseding historical catalog numbers DG-49580, DG-43988, and DG-42987. Engineered specifically for Mutoh’s workhorse single-head and dual-head production series—including the ValueJet 1324, 1324X, 1624, 1624X, 1624W, 1924W, and 1624WX—this assembly is factory-programmed with authentic Mutoh 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 water-based dye sublimation inks.
Product Overview
The Original Mutoh DH-40274 / DG-43988 DX7 Printhead Assembly is an industrial-grade drop-on-demand (DoD) piezoelectric printhead designed for high-resolution vehicle wraps, outdoor banners, backlit sign boxes, fine-art canvas, and transfer paper sublimation. Consolidating 8 independent fluid channels into a single monolithic housing, this module allows a single carriage unit to output dual CMYK (2 × 4 colors) continuous high-speed production with high channel isolation and minimal color crossover.
Configured with 1,440 active 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 drop modulation works seamlessly with Mutoh’s proprietary Intelligent Interweaving (i²) wave printing algorithms, eliminating horizontal banding while yielding smooth photographic skin tones and razor-sharp 2-point vector micro-text.
Part Information
| Product Name | Original Mutoh ValueJet DX7 Printhead Assembly |
| OEM Manufacturer | Mutoh Industries Ltd. / Epson MicroPiezo Core (Japan) |
| Current OEM Part Number | DH-40274 |
| Superseded / Interchangeable Codes | DG-49580 / DG-43988 / DG-42987 |
| Core Transducer Architecture | MicroPiezo DX7 Drop-on-Demand (DoD) Piezoelectric Platform |
| Component Classification | Multi-Channel Eco-Solvent & Sublimation Industrial Printhead Module |
| Supported Channel Routing | Dual CMYK (2 × 4 channels) or 8-Channel Production Routing |
| 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) |
| Native Optical Resolution | 1440 DPI (180 DPI per 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 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
- Authentic Mutoh Firmware Encryption: Factory-coded with authentic Mutoh encryption parameters, ensuring direct synchronization with VJ-1324/1624 carriage boards without decoder hardware or firmware communication errors.
- Solvent-Resistant Manifold Passivation: Fortified epoxy bonding and internal passivations resist aggressive Eco-Ultra glycol ethers and UMS diluents, preventing cavity delamination and cross-channel bleed.
- Intelligent Interweaving (i²) Optimization: Tight nozzle pitch manufacturing and uniform drop velocity guarantee smooth wave-pattern blending, eliminating horizontal banding across production passes.
- Direct Drop-In OEM Fitment: Built to exact Mutoh factory dimensions, restoring original droplet trajectory and carriage height parallelization without mechanical modifications.
CRITICAL TECHNICAL & SERVICE ADVISORY
1. Generational & Model Distinction (DX7 vs. DX5 vs. UV DX7): The DH-40274 / DG-43988 is engineered specifically for ValueJet DX7 eco-solvent and sublimation models (VJ-1324, 1624, 1624W). It is completely incompatible with earlier DX5 ValueJet models (VJ-1604 using DF-49684, VJ-1618 using DG-41914), generic unlocked DX5 heads (F186000), and dedicated UV-LED DX7 heads (DG-45279 for VJ-426UF / 1626UH). Installing incorrect assemblies will result in carriage board communication errors or premature delamination.
2. Mandatory Head-Rank ID Calibration: Following mechanical mounting and ribbon cable attachment, the service technician MUST input the alphanumeric Head-Rank ID (printed on the barcode label) via the Mutoh Maintenance Engineer Software (`MSA`). Running the head without updating the voltage rank results in drop deflection, satellite misting, and accelerated piezo channel degradation.
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 1324 Series | ValueJet 1324 (VJ-1324), ValueJet 1324X | Single 8-Channel DX7 Head (Dual CMYK) |
| Mutoh ValueJet 1624 Series | ValueJet 1624 (VJ-1624), ValueJet 1624X | Single 8-Channel DX7 Head (Dual CMYK) |
| Mutoh ValueJet Water-Based & Sublimation | VJ-1624W, VJ-1624WX, VJ-1924W | Aqueous Dye Sublimation Production |
| Mutoh ValueJet Dual-Head (Reference) | VJ-1638, VJ-1638X, VJ-1938WX, VJ-2638 | Dual-head staggered models require 2x matched DX7 units |
| Mutoh ValueJet 1604 / 1614 (Reference) | VJ-1204, VJ-1304, VJ-1604, VJ-1614 | Incompatible: Previous-gen models use DX5 head DF-49684 |
| Mutoh ValueJet 426UF / 1626UH (Reference) | VJ-426UF, VJ-1626UH | Incompatible: UV-LED models use dedicated UV DX7 head DG-45279 |
*Model Differentiation Note: Specifically engineered for Mutoh ValueJet 1324, 1624, 1624W, 1924W, and 1624WX 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-40274
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