A20B-8100-0665 Fanuc 21i-B Mainboard PMC-SB7 Ethernet Function

FANUC Series 21i (with Ethernet function, PMC–SB7).

Only those personnel who have received approved safety and maintenance training may perform this FANUC A20B-8100-0665 Motherboard replacement work. When opening the cabinet and replacing the board, be careful not to touch the high–voltage circuits (marked and fitted with an insulating cover). Touching the uncovered high–voltage circuits presents an extremely dangerous electric shock hazard. efore starting replacement work, back up the contents (such as parameters and programs) of the SRAM memory of the CNC. Otherwise, the contents of the SRAM memory may be lost during replacement work. Unscrew the four screws fastening the case, and remove the case. The fan and battery cable do not have to be removed. If the unit has a touch panel, the touch panel control PCB is on the left when viewed from the back of the basic unit. Before removing the case, remove the cables connected to this touch panel control PCB (connectors CN1 and CD37).