NEC FA Series Installation And Maintenance Manual page 87

(2) Installing the hub board
Install the hub board into the cabinet following the procedure below.
(a) Connect the status board to the hub board using the cable.
(b) Install the hub board into the cabinet. Install it with the power unit pins and connectors aligned.
Insert the pins and connectors completely and check that the hub board is securely attached and not
bent.
(c) Tighten the 18 screws. Use a tightening torque of 3 ± 0.5 kgf•cm.
(d) Connect the LAN cable.
Replacing the power unit
The power unit dissipates heat through the cabinet. Apply some thermal paste on the back of the power unit
to be replaced. Ask your retailer for more details on the types of thermal paste.
(a) Remove the hub board following the "(1) Removing the hub board" procedure on the previous page.
(b) Remove the four screws, and then remove the power hub board.
(c) Remove the two screws securing the power unit, and then replace the power unit.
(d) Install the power hub board, the protective sheet, and the hub board.
(e) Install the hub board following the "(2) Installing the hub board" procedure on the previous page.
Remove the four screws.
Use a Phillips screwdriver (No. 2).
Torque for installation: 3 ± 0.5 kgf•cm
Remove the power hub board.
Each power supply unit and power hub board are connected by three pins.
When you put it on, please insert a pin
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