Hello good day, i obtain this alarm in a Fanuc 6M control (604 PC Alarm), checking the manual maintenance, suggest change the pcb (pg51):

Cause Checking Countermeasures
PCB A20B-0008-0440 is faulty. Make sure that PCB setscrews are fastened. Replace the PCB.

I can obtain this pcb of other 6M, however i no have clear the functions of this:

Replace this pcb of other control 6M there may be compatibility?

Program of change tool is in this pcb?

regards
Renato

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