FANUC A20B-1006-0471 is the internal wiring and power printed circuit board used in the FANUC Alpha PSM-26 power supply module A06B-6087-H126. It carries the module’s main power connections and related power-stage components. This item is a replacement PCB, not a complete PSM-26 power supply.

Board revisions including /01A, /03B, /03BR and /04B have been observed, and some boards also carry A350-1006-T474/01. Match the complete number and physical layout on the original board before ordering.

A20B-1006-0471 Product Information

PSM-26 Power Board Function

Installed inside the PSM-26, this board provides the wiring platform for main power terminals, protection parts and internal power-stage connections. The A16B-2202-0421 is the associated control PCB, so the two boards should not be confused when diagnosing or ordering a replacement.

Revision and Module Compatibility

Confirm A20B-1006-0471, the full revision suffix, A350 marking where present, terminal arrangement, connectors, mounting points and host module A06B-6087-H126. Do not substitute A20B-1006-0470, A20B-1006-0472 or another PSM board solely because the housing appears similar.

Testing and Installation Notes

REACO CNC checks the board label, terminals, fuse holders, connectors, solder joints and major components, followed by applicable electrical and functional testing. Qualified personnel must isolate the machine and allow the DC link to discharge fully before removing the power supply module.

Related resources: FANUC circuit boards, FANUC drives and power modules and FANUC CNC repair services.