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Green rectangular circuit board with gold connectors and black electronic components

YINGHUA

YINGHUA Ink Cartridge Detection Board E6792 4L27L2

SKU CH-78XA-EJGZZ

Replacement detection board E6792 4L27L2 restores ink-cartridge recognition for WF-5620, WF-5621 and WF-5623 printers

  • Product categoryReplacement Parts
  • Restores cartridge recognition on compatible Epson printers
  • Direct replacement for part number E6792 4L27L2
  • Supports WorkForce models 5620, 5621, 5623 and WF variants
  • New condition ensures reliable performance from installation

Compatible Printer Models

The YINGHUA E6792 4L27L2 detection board replaces the original cartridge sensor in select Forepson WorkForce printers. It fits the WF-5620, WF-5621, WF-5623 and 5620 models. This part restores accurate ink-level reporting when the factory board fails.

Thermal Noise and Power Characteristics

As a passive electronic sensor board, the unit generates no measurable heat and operates silently. It draws negligible power directly from the printer's internal supply during normal cartridge reads. No active cooling or external power considerations apply.

How it compares

Measured against everything we stock in Print & Scan Accessories, at today’s prices. Recalculated every night.

Price $61.99
Cheaper than about 65% of the 5,855 comparable items (median $91.99).

Specifications

Product
Product categoryReplacement Parts

Questions about this item

How do I install the E6792 detection board in my WF-5621 and what step is often missed?

Power off the printer, remove the old board from the carriage, connect the new E6792 flex cable securely, then reseat the ink cartridges so the chip contacts align; skipping the cartridge reseat causes detection errors.

What maintenance or replacement will the 4L27L2 board need over time?

The board itself has no service schedule; if ink residue builds on the sensor pads, clean them gently with a lint-free swab and isopropyl alcohol, otherwise replace only when cartridge recognition fails permanently.

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