CA11 SUB-C - 2124764

2124764 – Sub board (CA11 Sub-C) – Epson Stylus Pro

The sub board (CA11 Sub-C, 2124764) is fitted to Epson printers. It provides the electronic control of a machine sub-system and passes the signals to the main board.

The Epson repair guide for the Stylus Pro 7900 / 9900 identifies it as "C594 Sub-C Board": it is the relay board between the main board (two 34-pin ribbon cables CN300 / CN301) and the left-hand mechanism, namely the paper feed encoder and motor, the cutter and its encoder, and the pressure roller home position sensor. It is fixed to the left-hand side of the frame, accessible after removing the left side cover.

Technical specifications

• OEM reference: 2124764
• Manufacturer: Epson
• Part type: Sub board
• Manufacturer designation: "Sub-C Board" (identified as "C594 Sub-C Board" in the Epson Stylus Pro 7900 / 9900 repair guide)
• Location: Left-hand side of the frame, accessible after removing the left side cover
• Connectors to the main board: CN300 and CN301 (34-pin ribbon cables)
• Peripheral connectors: CN302 paper feed encoder (4-pin), CN303 paper feed motor (2-pin), CN304 motor (2-pin), CN305 left maintenance tank (Stylus Pro 9900), CN307 cutter home position sensor, CN308 not used, CN309 cutter motor, CN310 pressure roller home position sensor, CN311 cutter motor encoder
• Cables to disconnect during replacement: 9 on Stylus Pro 7900 (2 ribbon cables and 7 wire cables), 10 on Stylus Pro 9900
• Note: The equivalent reference 2119913 is taken from our own data: no independent source confirms it as an equivalent of 2124764, and one listing describes it as the "CA11 SUB-B" board of the Stylus Pro 9900 (right-hand side board, distinct from the Sub-C). Compatibility with the Epson STYLUS PRO 7710, 7908, 7910, 9910 and the Epson PX-H7000, PX-H8000, PX-H10000 is also taken from our own data without cross-checking against manufacturer or distributor sources. Check against the reference of your board before ordering.
• Shipping: Shipped ready to install

Compatibility & use

• Epson PX-H7000
• Epson PX-H8000
• Epson PX-H10000
• Epson STYLUS PRO 7700
• Epson STYLUS PRO 7710
• Epson STYLUS PRO 7890
• Epson STYLUS PRO 7900
• Epson STYLUS PRO 7908
• Epson STYLUS PRO 7910
• Epson STYLUS PRO 9700
• Epson STYLUS PRO 9890
• Epson STYLUS PRO 9900
• Epson STYLUS PRO 9910
• Mark the cables before removal: 9 on Stylus Pro 7900 (ribbon cables CN300 / CN301 and wire connectors), 10 on Stylus Pro 9900 (plus connector CN305 of the left maintenance tank).
• The repair guide assigns CN304 sometimes to the carriage motor ("Carriage Motor", connector table), sometimes to the paper feed motor ("Paper Feed Motor", annotated photo): check the cable actually connected on the machine before drawing any conclusion.
• Before replacing the board for a paper feed or cutter fault, check the seating and condition of the CN300 / CN301 ribbon cables and of the cable of the motor, encoder or sensor concerned.

Function

• Relay board between the main board (ribbon cables CN300 / CN301) and the left-hand mechanism, according to the Epson Stylus Pro 7900 / 9900 repair guide
• Connects the paper feed encoder and motor (CN302 / CN303)
• Connects the cutter motor (CN309), its encoder (CN311) and its home position sensor (CN307)
• Connects the pressure roller home position sensor (CN310) and, on Stylus Pro 9900, the left maintenance tank (CN305)
• Provides the electronic control of a sub-system
• Passes the signals to the main board
• Acts as the interface between firmware and hardware

Signs of wear

• Faulty paper feed or paper feed encoder not read: may come from the board or its CN302 / CN303 connections
• Cutter not working or cutter home position not detected: may come from the board or the CN307 / CN309 / CN311 connections
• Pressure roller home position not detected: may come from the board or the CN310 connection
• 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.

Equivalent references : 2119913

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