Remove the old TC PCB from the standoffs  on the I/O PCB. Install the replacement TC PCB on the standoffs.
Connect cable P/N 33-0413 from J1  on the TC PCB to P74  on the I/O PCB.
Connect cable P/N 33-0412 from P55A  on the TC PCB to P55  on the I/O PCB.
Connect cable P/N 33-0349 from P4 on PSUP PCB to the P55  on the TC PCB.
Connect the tool changer/bar feeder cable to P58 .
For EC models, connect the external resistor at P57 .
Note: After installation make sure the SIO Version is 3.17 or higher and the I/O TC Version is 2.06 or higher. If not update the firmware to the correct version. Refer to I/O PCB Firmware - Update - NGC procedure.