2109393 - BOARD ASSY DETECTOR PW B

2109393 – Detector board (Board Assy Detector PW B) – Epson SureColor T

The detection board (Board Assy Detector PW B, 2109393) is fitted to Epson large-format printers. It handles the detection signals and serves as an interface with the main board.

Its Epson parts-list label is "BOARD ASSY., DETECTOR, PW, B": a "PW" media-detection sensor board, carried over identically by several distributors ("PW sensor", "Paper Detector Sensor"). Distributors list it for the Epson SureColor T series (SC-T3000 / SC-T5000 / SC-T7000 and later models), for the SureColor SC-P800, and for many Epson desktop models: the same sensor is common to a very large number of machines.

Technical specifications

• OEM reference: 2109393
• Manufacturer: Epson
• Part type: Detector board (PW)
• Manufacturer designation: "BOARD ASSY., DETECTOR, PW, B" (Epson parts list)
• Nature: Small media-detection sensor board ("PW sensor", "Paper Detector Sensor")
• Machines (per distributors): Epson SureColor T series (SC-T3000 / SC-T5000 / SC-T7000 and later), SureColor SC-P800; sensor also fitted to many Epson desktop models
• Shipping: Shipped ready to install

Compatibility & use

• Before replacing the board, clean the sensor window and check its flex cable and connector: a fouled sensor or a poorly seated flex cable gives the same symptoms as a failed board. Check the label suffix ("B") on the fitted part before ordering.

Function

• Detects the presence of media and passes the detection signal ("PW") to the machine electronics, per the Epson parts-list label carried over by distributors
• Ensures the electronic control of a sub-system
• Passes the signals to the main board
• Acts as an interface between the firmware and the hardware

Signs of wear

• Media not detected or wrongly reported absent, media loading or measurement error, if the sensor and its flex cable are ruled out (cautious wording: no public manufacturer error code)
• Sub-system not driven
• Electronic errors
• Loss of internal communication
• Erratic behaviour or machine stops

Replacing this part restores the machine to proper working order.

♻️ DG Spare Parts – European specialist in spare parts for large-format printers and plotters.