Jeol EXPNDR-S Backplane PCB Card 886514461 BP100669-01 BOSM3413 Electron

Jeol EXPNDR-S Backplane PCB Card 886514461 BP100669-01 BOSM3413 Electron Microscope

This is a genuine Jeol EXPNDR-S backplane expansion PCB card pulled from a Jeol electron microscope system. The board carries three identifying numbers — part number 886514461, PCB assembly number BP100669-01, and reference designation BOSM3413 — and functions as an internal backplane or expansion interconnect board within the Jeol microscope chassis. It is a passive PCB with no active logic components of its own; its role is to provide high-density card-to-card or card-to-chassis signal routing through its large multi-pin edge connectors on each end.

Specifications & What's Included

• Manufacturer: Jeol (Japan Electron Optics Laboratory)
• Board designation: EXPNDR-S (Expander-S backplane/expansion board)
• Part number: 886514461
• PCB assembly number: BP100669-01
• Reference number: BOSM3413
• Connector CN2 with A/B/C row labeling (visible on PCB silkscreen)
• Large multi-pin DIN/card-edge connector on bottom edge (primary backplane interface)
• Smaller multi-pin connector on top edge (secondary interface)
• Multi-pin card-edge connectors on left and right ends for chassis slot engagement
• Black ejector/retention tabs on both left and right ends for chassis mounting
• Green FR4-style PCB with fine trace routing across full board surface
• Board only — no cables or additional hardware included

Applications

Jeol (Japan Electron Optics Laboratory) is one of the leading manufacturers of electron microscopes, producing both scanning electron microscopes (SEM) and transmission electron microscopes (TEM) for semiconductor inspection, materials science, biological research, and industrial quality control. Internal backplane and expansion PCBs like the EXPNDR-S serve as signal distribution and interconnect boards within the microscope's electronics chassis, linking the control electronics, scan generators, detector circuits, and image processing boards. These boards are critical to system operation and are not commercially available through standard distribution channels — they are sourced primarily as spares from decommissioned or upgraded Jeol systems. Technicians maintaining legacy Jeol SEM and TEM installations frequently need these boards to restore systems to service, making them a sought-after replacement part in the electron microscopy service and repair community.