Fanuc PC Board A16B-2202-0781 A16B22020781 A16B-22O2-O781 large stock

A16B-2202-0781 | FANUC A16B-2202 Series Alpha Drive PCB — Japan Origin / CNC Servo Drive Systems / Industrial Automation Spare

A16B-2202 — The Alpha Series Drive PCB Family

The A16B-2202 series is FANUC's core drive PCB family for the Alpha and Alpha-i servo and spindle amplifier generation. This series is one of the most extensively documented in FANUC's parts catalogue — spanning wiring boards, interface boards, and spindle control cards for multiple drive product families.

Confirmed board groups within the A16B-2202 series include:

SVM2 wiring boards (075x–077x): Including A16B-2202-0750/0751/0752/0753 (SVM2-12/12 through SVM2-40/40 FSSB wiring boards) and the earlier A16B-2202-0770/0771/0772 (old-specification wiring boards for the same SVM2 Type A/B variants).

SVM1 wiring boards (07xx): Including A16B-2202-0740/0741/0742/0743 (confirmed FSSB SVM1 wiring boards) and A16B-2202-0760/0761/0762 (Alpha SVM1 Type A/B wiring boards for SVM1-40S, SVM1-40L, SVM1-80).

SPM spindle control cards (04xx): Including A16B-2202-0421 (PSM control PCB) and A16B-2202-0432/0435 (Alpha SPM-15 to SPM-55 control cards).

Sub CPU and system boards: Including A16B-2202-0571 (Series 15-B Sub CPU) and A16B-2202-0860 (Series 18-B 4-axis main CPU).

The A16B-2202-0781 at the 078x position occupies the zone between the confirmed SVM1/SVM2 drive wiring boards and the Alpha SVM1-240 wiring board (A16B-2202-0790 family), placing it within the Alpha drive wiring board application domain.

Key Product Information

Japan Origin — Alpha Series Quality Standard

All A16B-2202 series boards are manufactured in Japan. For Alpha series servo drive boards — which operate in machine tool electrical cabinets subject to vibration, thermal cycling, and long continuous duty cycles — Japan-origin manufacturing provides:

PCB quality: Copper weight, laminate specification, and via fill standards matched to the high-current and high-reliability requirements of drive system boards.

Component selection: Industrial-grade SMD components with temperature ratings appropriate for the drive cabinet environment, sourced from qualified suppliers with lot traceability.

Testing standards: All A16B-2202 series boards are verified against FANUC's production specifications before shipping — confirmed for correct function in the drive system they serve.

Application Scenarios

Alpha drive system board fault: A FANUC Alpha series CNC servo drive system identifies the A16B-2202-0781 from its board label as the failed component. Replacement restores the drive function.

Alpha drive module refurbishment: A specialist CNC service workshop overhauling FANUC Alpha series drive modules includes the A16B-2202-0781 in its inventory for the 078x board range.

FAQ

Q1: How do I confirm A16B-2202-0781 is the correct board for my Alpha drive?

Read the part number from the board label inside the specific drive module. If it reads A16B-2202-0781, this is the correct replacement. Cross-reference with the GE Fanuc Alpha Series maintenance manual (B-65165E or related) spare parts table for the applicable drive module order number.

Q2: Is A16B-2202-0781 a wiring board or a control card?

The A16B-2202 078x range falls within the wiring board section of the series — between the confirmed SVM1/SVM2 wiring boards (075x–077x) and the SVM1-240 wiring board (A16B-2202-0790). Wiring boards in this range provide the high-current connector interface within the drive module. Confirm the board's specific functional type from the host drive module's documentation.

Q3: Does replacing A16B-2202-0781 affect servo parameters?

No. Servo parameters reside in the CNC's main parameter memory. Replacing A16B-2202-0781 does not affect any stored servo parameter values. After fitting the replacement, the CNC re-establishes servo communication and applies the existing parameters.

Q4: What discharge procedure applies before accessing A16B-2202-0781?

Alpha series drive modules contain DC bus capacitors retaining dangerous voltage after mains power removal. Follow the discharge wait procedure in the GE Fanuc Alpha Series maintenance manual for the applicable module. Verify bus discharge with a calibrated DC voltmeter before opening the module housing.