FP-740 Linear Encoder Board - 6700049050

Roland Linear Encoder Board — Part No. 6700049050

The linear encoder board is an essential electronic component of the positioning system in Roland large-format printers. It reads the carriage’s position data via the encoder strip, ensuring precise control of movement along the X-axis.

This sensor board plays a key role in print quality, ensuring perfect pass alignment and accurate reproduction of images. Any failure can result in visible defects such as banding or print misalignment.

OEM part number 6700049050 is used on several Roland FP, SJ, XJ and XC models. It also replaces several equivalent part numbers in linear encoder systems.

Technical specifications

• OEM part number: 6700049050
• Type: linear encoder board (sensor board)
• Function: carriage position reading
• System: encoder strip + optical sensor
• Position: print carriage
• Application: X-axis (carriage movement)

Compatibility and use

• Roland FP: FP-740
• Roland SJ: SJ-1000, SJ-1045EX
• Roland XC: XC-540
• Roland XJ: XJ-540, XJ-640, XJ-740

Equivalent / replaced part numbers

• W700251140
• W853905340
• W700311380
• W700731380
• 6700909040

Function

• Detects the carriage position via the encoder strip
• Ensures precise movement along the X-axis
• Ensures alignment of print passes
• Optimises print quality and sharpness

Possible symptoms in the event of a fault

• Horizontal banding on prints
• Misalignment or double imaging
• Carriage positioning errors
• Encoder-related error messages
• Irregular or unstable printing

Important: this card works in conjunction with the encoder strip. It is recommended that you also check the condition of the encoder strip when replacing it.

This part has now been discontinued by the manufacturer, but remains available in a compatible or refurbished version.

♻️ DG Spare Parts — global specialist in electronic and motion system parts for large-format printers.