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Scan 125 Universal Piano Board Interface - 15-pin connector
Scan 225 Mode Control (Rewind, Roll-Forward, Manual Operate Vacuum Pump)
Scan 325 Motor Drive Circuit (Roll Motor)
Scan 425 Timer Circuit (Time Delay for Vacuum Pump)
Scan 525 Control of Pump Start/Stop
Scan 625 Brake Circuit ~ Repeat Circuit (Rare)
Scan 725 Pump Motor Control (Power Board)
Scan 825 Power Supply

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