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Brother SC1620001 GTX-423 White Printhead Assembly
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Factory-original Brother SC1620001 White channel industrial printhead assembly engineered for Brother GTX-423 direct-to-garment printers.
OEM Industrial Garment Component
Original Brother SC1620001 GTX-423 White Printhead Assembly
OEM Part Number: SC1620001 (GTX Series White Channel) | Industrial High-Density Piezoelectric DoD Printhead Assembly with Active Recirculation
GTX-4 Series Industrial White Ink Recirculation Notice
The Brother SC1620001 White Printhead Assembly is a factory-original industrial piezoelectric replacement printhead engineered specifically for the dedicated White ink carriage station of the Brother GTX-423 (GTX-4 Series) Direct-to-Garment printer. Built to handle heavy titanium dioxide (TiO₂) white pigment formulations, this assembly incorporates dual-port active circulation channels, advanced meniscus dampening, and high-frequency piezo actuation to eliminate pigment sedimentation and deliver dense underbase opacity.
Product Overview
The Original Brother SC1620001 GTX-423 White Printhead Assembly is an authentic OEM high-productivity piezoelectric drop-on-demand (DoD) printhead engineered for industrial digital garment printing on dark apparel, 100% cotton, ring-spun garments, and heavy fleece fabrics. Operating alongside the CMYK color head in the Brother GTX dual-carriage architecture, the SC1620001 fires dedicated white underbase passes at single-pass production speeds, laying down smooth, opaque white foundations for CMYK highlight inks.
Designed with 1,680 active addressable nozzles configured across multiple interleaved channels, this assembly delivers native resolutions up to 1200 × 1200 DPI. The unit features specialized internal circulation manifolds connected directly to the GTX white ink agitation and sub-tank pump system. This continuous fluid motion keeps dense pigment particles suspended within the micro-fluidic chambers, eliminating nozzle clogging, settling, and ink starvation during continuous multi-shirt production shifts.
Part Information
| Product Name | Original Brother GTX-423 White Printhead Assembly |
| OEM Manufacturer | Brother Industries, Ltd. (Industrial Machinery Division, Japan) |
| OEM Part Number | SC1620001 |
| Component Classification | Industrial High-Density Piezoelectric Drop-on-Demand (PZT DoD) Printhead Module |
| Dedicated Channel Allocation | Dedicated White Channel Assembly (4 lines dedicated to White / Underbase ink) |
| Recirculation Support | Active closed-loop dual-port white ink circulation architecture |
| Ink Formulation Pairing | Brother Genuine Innobella Textile White Pigment Ink (GTX Series) |
| Country of Origin | Japan (Genuine Factory Original Sealed Package) |
Technical Specifications
| Print Technology | High-Speed Industrial Lead Zirconate Titanate (PZT) Piezoelectric Drop-on-Demand |
| Active Addressable Nozzles | 1,680 nozzles per printhead assembly (high-density multi-row array) |
| Carriage Allocation | Mounted in Front/White carriage bay (operating parallel to the CMYK color head) |
| Maximum Native Resolution | Up to 1200 × 1200 DPI selectable output |
| Droplet Ejection Profile | Calibrated variable drop textile waveform engineered for high-solids titanium dioxide ink |
| Fluid Interface Port Architecture | Multi-inlet circulation manifold ports with internal stainless steel micron filtration |
| Electrical Interface | High-speed multi-conductor gold flat flexible cable (FFC) connector array with ESD shield ground |
| Operating Temperature Range | 18°C to 30°C (64°F to 86°F) recommended press ambient |
| Operating Humidity Range | 45% to 85% RH non-condensing (strictly maintained to preserve nozzle hydration) |
| Physical Weight | Approx. 0.32 kg (head module alone) / Packaged: ~0.55 kg |
Key Features & Operational Advantages
- Active White Recirculation: Fluid channels constantly circulate white ink to prevent heavy titanium dioxide pigment settling during production and idle cycles.
- 1,680 High-Density Nozzle Layout: Ejects dense underbase layers in fewer passes, speeding up print cycles on dark apparel while preventing pinholes and fiber show-through.
- Factory Voltage Rank Matching: Each printhead includes an individual factory voltage rank matrix entered during replacement to harmonize firing velocities and eliminate banding.
- Heavy-Duty Orifice Passivation: Stainless steel faceplate and chemical-resistant passivation resist erosion from abrasive pigment particles, maintaining nozzle shape and droplet trajectory over high-volume shirt runs.
CRITICAL TECHNICAL & OPERATIONAL ADVISORY
1. Platform Specificity & Channel Differentiation: The SC1620001 is engineered specifically for the White ink station of Brother GTX-423 printers. It is not interchangeable with older legacy GT models (GT-541 or GT-782, which use SA6475001 / SC3024001), nor can it be used in the CMYK color carriage position without proper channel mapping and factory software assignment.
2. Mandatory Head Rank Code Registration: Following mechanical mounting, the technician MUST enter the alphanumeric rank code printed on the module barcode into the printer's maintenance firmware. Failure to register the correct head rank will cause improper piezo drive voltages, resulting in misting, deflected drops, or premature PZT damage.
3. Circulation Loop Priming & De-aeration: Ensure all white ink supply tubes, dampers, and recirculation return lines are thoroughly primed and purged of air bubbles before initiating test prints. Air trapped inside the recirculation manifold can disrupt meniscus pressure and cause stubborn nozzle dropouts.
4. Proper Faceplate Maintenance: Never use dry wipes or abrasive materials on the nozzle orifice plate. Clean only with genuine Brother GTX cleaning solution and lint-free foam-tipped swabs, taking care to keep the capping station rubber seal clean and pliable.
Compatible Models & Systems
| Printer Platform | Ink Chemistry | Carriage Configuration |
|---|---|---|
| Brother GTX-423 | Innobella Textile White Pigment | Dedicated White Ink Carriage Bay (1 × SC1620001 White Head) |
| Brother GTX-422 (Reference) | Innobella Textile Pigment (CMYK+W) | GTX-4 series platform variant; confirm part assignment via service menu |
| Brother GT-3 Series (Reference) | GT-3 Water-Based Pigment | Incompatible: GT-341/361/381 use modular GT-3 printheads (SB3184001) |
| Brother GT-541 / GT-782 (Reference) | Water-Based Garment Pigment | Incompatible: Legacy 128-nozzle platforms use SC3024001 / SA6475001 |
*Model Differentiation Note: Specifically engineered for the White ink station of Brother GTX-4 series printers. Always verify the printer model tag and confirm head rank values prior to unpacking.
Terms, Warranty & Customer Protection
Condition: 100% Brand New, Genuine OEM Factory-Original Brother Industrial Replacement Printhead in sealed factory protective container with shipping preservation fluid intact.
Manufacturer Warranty: Covered under Brother's industrial limited parts warranty against defects in materials and manufacturing prior to ink introduction. No warranty applies once active textile ink or flush fluid has been introduced into the micro-fluidic chambers, or if damage results from garment strikes, platen collisions, improper cleaning swabs, or incorrect voltage rank input.
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 seated into a carriage and charged with ink, returns cannot be accepted due to calibration activation, fluid priming, and cross-contamination risks.
SC1620001
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