Fanuc Robot 31i Model B5

Remove each cable from the control unit

Pull out the printed circuit board while pushing down the hook of handle A and pushing up the hook of handle B

Move the cards and modules from the detached main board to another (replacing) main board, attach the replacing main board

While holding handles A and B, push the main board into the control unit slowly and engage it with the back panel connector. Make sure that the hooks of handles A and B have latched on the case

While referencing Subsection 3.11.2, attach the fan unit. Note that, unless the main board is engaged with the back panel securely, the fan unit cannot be mounted

Sign off on the control unit replacement

Remove each cable from the control unit

Take out the control unit from the cabinet

Detach the two screws in the lower section of the case unit from the main board

Pull out the case unit while unlatching the claws from the metal bases on both sides in the upper section of the case unit

Remove the cable from each connector on the main board

Also remove the screws fastening the main board

Detach the main board by pulling it down

Move the cards and modules from the detached main board to another (replacing) main board

Attach the replacing main board

Open the claw of the socket outward. (Fig. a)

Extract the module slantly upward. (Fig. b)

Insert the module slantly into the module socket, with side B facing upward. (Fig. b)

Push the module downward until it is locked. (Fig. c) At this time, push it down with pushing two points of (*) in the figure.

Sign off on the module maintenance

How to Detach Fan Units from 60 and 90 mm Width Units

Holding the two lugs on the fan unit, lift the internal cooling fan unit upward

Check if the lock of DC link terminal cover is released and opened

Check if the discharge of DC link (LED has gone out) is checked, and DC link short bar is removed

Loosen the lower screw (one place) of the radiator cooling fan unit

Loosen the upper screw (60mm wide is one place and 90mm wide is two places) of the radiator cooling fan unit

Pull out the radiator cooling fan unit to the front

How to Detach Fan Units from 150 and 300 mm Width Units

Holding the two lugs on the fan unit, lift the internal cooling fan unit upward

Detach each cable from the display unit

Remove the screws from the cover and detach the cover

Remove the two screws from the lower section of the case unit

Remove the cable from each connector on the display control board

Detach the display control board by pulling it down

Move cards and modules from the detached display control board to another

Connect the display control board to the inverter board and fasten it with screws

Re-attach each cable to the display control board