FANUC A20B-1006-0487 is the power and wiring board used in selected FANUC Alpha SPM-22 spindle amplifier modules. It carries power-stage and internal connection functions and is different from the separate spindle control PCB.

FANUC documentation lists this board in several CE-marked SPM-22 configurations, including A06B-6088-H122/H222/H322/H422 and A06B-6102-H122/H222. The complete amplifier number, suffix and installed control hardware must still be verified.

A20B-1006-0487 Product Information

SPM-22 Power Board Function

The A20B-1006-0487 forms part of the spindle amplifier power section. It works with the module’s firing, control and protection circuits to support spindle motor operation. Possible faults may involve fuses, semiconductor modules, DC-bus connections, damaged tracks or heat-stressed components.

Interface and Control Hardware

This board appears in type 1, type 2 and type 3 SPM-22 configurations, while the control PCB and sensor hardware vary with the complete A06B model. For example, A06B-6102-H222 uses different control hardware from A06B-6088-H322 or A06B-6088-H422. The power board number alone does not establish complete amplifier interchangeability.

Replacement and Revision Checks

Match the actual A20B-1006-0487 board label first, followed by the full spindle-module number, suffix such as #H500 or #H520, CE status, revision, connectors and mounting arrangement. Non-CE SPM-22 modules may use A20B-1006-0171, so appearance alone is not sufficient.

Testing and Installation Notes

REACO CNC checks the label, revision, connectors, fuses, power components, solder condition and compatible spindle-amplifier operation where applicable. Qualified personnel must isolate power and confirm that the DC bus has fully discharged before handling or installation.

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