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Toshiba TEC B-EV4D Direct Thermal Printhead 300 DPI FMBC0077902
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Factory OEM 300 DPI high-resolution direct thermal printhead for Toshiba TEC B-EV4D-TS desktop barcode printers. Produces sharp 2D barcodes, fine compliance markings, and small text. Authentic factory replacement component.
OEM Replacement Component
Toshiba TEC B-EV4D Series 4-Inch Thermal Printhead (300 DPI)
OEM Part Number: FMBC0077902 | High-Resolution Direct Thermal Desktop Line Head Assembly
Product Overview
The Toshiba TEC FMBC0077902 is an authentic original equipment manufacturer (OEM) replacement thermal printhead engineered specifically for the Toshiba TEC B-EV4D desktop label printer series (TS14 / 300 DPI models). Developed for high-precision ribbonless applications, this line head delivers sharp 300 DPI (11.8 dots/mm) resolution across an active 4.19-inch (106.4 mm) printline span.
Equipped with 1,256 microscopic thin-film heating elements at a fine 0.085 mm dot pitch, the FMBC0077902 is coated with a reinforced dielectric glaze designed to endure direct contact friction and chemical topcoats present on direct thermal face stocks. The assembly integrates a rigid aluminum heatsink plate with factory-molded pivot notches that seat directly into the B-EV4D clamshell carriage, restoring factory dot accuracy for dense 2D Data Matrix codes, pharmaceutical vial tracking, and micro-text ticketing.
Part Information
| Product Name | Toshiba TEC B-EV4D Direct Thermal Printhead |
| OEM Manufacturer | Toshiba TEC Corporation |
| OEM Part Number | FMBC0077902 |
| Component Classification | Original Equipment Manufacturer (OEM) Replacement Thermal Printhead |
| Chassis & Substrate | Thin-Film Glazed Ceramic Matrix on Integrated Aluminum Heat-Spreader Plate |
| Manufacturing Standard | Toshiba TEC Factory Certified (Japan) |
Technical Specifications
| Printing Technology | Direct Thermal (DT) Dedicated |
| Native Resolution | 300 DPI (11.8 dots/mm) |
| Dot Pitch | 0.085 mm (nominal dot-to-dot spacing) |
| Effective Print Width | Up to 106.4 mm (4.19 inches) |
| Total Heating Elements | 1,256 Dots (continuous linear array) |
| Rated Print Speed | Up to 4.0 ips (101.6 mm/sec) — media thermal sensitivity dependent |
| Media Compatibility | Direct thermal receipt papers, continuous rolls, fanfold media, and top-coated direct thermal labels |
| Electrical Interface | High-speed multi-pin Flexible Flat Cable (FFC) connector terminal |
| Thermal Management | Integrated internal thermistor for closed-loop strobe pulse width regulation |
Key Features & Operational Advantages
- High-Resolution 300 DPI Element Density: Provides 1,256 individual dot points to render crisp micro-fonts, curved vector graphics, and dense 2D symbologies (QR code, Data Matrix) without raster jaggedness.
- Reinforced Direct Thermal Glaze: Hardened dielectric glass coat shields micro-resistors from the abrasive wear, friction, and chemical residues typical of direct thermal coatings and continuous paper movement.
- Direct Clamshell Alignment: Engineered with factory locating notches matching the B-EV4D pivot brackets, enabling rapid, tool-less replacement and uniform mechanical seating across the platen roller.
- Calibrated Factory Resistance: Pre-ranked internal resistance values match B-EV4D mainboard timing parameters, preventing uneven burn lines and maintaining uniform print density across the entire printline.
CRITICAL TECHNICAL & OPERATIONAL ADVISORY
1. Mandatory ESD Safeguards: Microscopic thin-film heater elements and onboard driver shift registers are Class 1 ESD-sensitive components. Technicians must wear a grounded ESD wrist strap and work on a static-dissipative work surface. Never touch the ceramic dot array or signal connector terminals directly.
2. Complete Power Isolation: Always power off the printer and disconnect the external AC/DC power supply brick before replacing the printhead. Disconnecting or seating the flexible flat cable (FFC) while the mainboard circuit is energized will cause instantaneous gate blowout in the driver ICs and permanently destroy the head.
3. FFC Harness Handling: Ensure the flexible flat cable is seated squarely into the connector terminal without misaligned pins or angled insertion. Skewed cable seating can short power rails directly into logic lines, causing irreversible mainboard failure.
4. Preventive Cleaning Regimen: Direct thermal media operates with direct surface contact, creating high paper-dust and chemical slurry build-up. Clean the dot line regularly (ideally after every roll change) using a lint-free swab saturated with 99.7% electronic-grade Isopropyl Alcohol (IPA). Allow the solvent to dry completely before restoring power. Never use razor blades or metal scrapers on the ceramic face.
Compatible Models & Systems
| System Family | Native Resolution | Supported Models |
|---|---|---|
| Toshiba TEC B-EV4D Series | 300 DPI (11.8 dots/mm) | B-EV4D-TS14-QM-R (Direct Thermal) |
| Toshiba TEC B-EV4 Series (DT) | 300 DPI (11.8 dots/mm) | B-EV4D-TH14 / 300 DPI DT Chassis Models |
*Model Differentiation Note: This printhead is dedicated strictly to the Direct Thermal (B-EV4D) 300 DPI model. It is NOT physically or mechanically compatible with Thermal Transfer (B-EV4T) models or 203 DPI (GS14) variants (Part # FMBC0077802). Verify the model designation on the printer base serial plate prior to unsealing the component.
Terms, Warranty & Customer Protection
Condition: 100% Brand New, Unopened Factory Original Genuine OEM Component in Factory-Sealed Anti-Static Packaging.
Warranty Scope: Covered by standard manufacturer DOA replacement protection against electrical continuity failures and physical manufacturing defects upon arrival. As a direct-contact thermal consumable, operational lifespan is determined by media abrasive characteristics, thermal darkness levels, and routine alcohol cleaning compliance.
Return Policy: Precision industrial electronics consumable. Items that have been unsealed from their protective static-shielding bag, mounted, or energized on a printer cannot be returned or restocked under standard commercial terms. Please confirm your printer model and OEM part number with technical support prior to breaking the factory seal.
FMBC0077902
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