Mother / Masterboard

[Swemill]

It seems that the problems with my mill is some failure on the mother board (Fanuc 3M-C) and I wonder if you guys have any tip where to buy a board to a decent price? Maybe someone here deals with Fanuc parts?

The boards number is: A16B-1000-0010 / 08F

Thanks in advance!

/Swemill

[alexfanuc]

What`s the alarm that you`re getting?
The board might be repairable.
Regards
Alexfanuc

[Swemill]

No alarm besides the LED2 on the Masterboard because the CRT and alarm display is out of order...
You can read about the problems in this thread:

http://www.cnczone.com/forums/showthread.php?t=93939

I've got the PC1 card tested on a Fanuc 3 controlled lathe and that seems to be OK.
Was also hoping that it could be repaired but it seems hard to find any who can do it in my area / Sweden.... Would Fanuc repair boards? I haven't checked direct with them but thought that they only exchange cards and to a high price...

[alexfanuc]

Ok, I read the threads.
Still you didn`t find where the sound (WAM!) came from. Is it like something exploded?

(Have disconnected M1 – M12 cables one by one on motherboard + M18 and M19 on PC1 (no M20 – M21 connected on PC2). The M5 cable were not connected..? Also tried with the CRT / CCX cable. Are not sure wich the “last one” – video signal cable is!? There wasn’t any other after M12 / M19? Is it the “CRT / CCX” cable? There also is a “RAM – M41” connection between mother board and memory board and a “black – white – brown” on top of motherboard.
However nothing was changed with the disconnection…..)

The cable for the monitor is CRT/CCX, do not disconnect that!. Try to disconnect everything but the cables on top of the master PCB and the connector CRT/CCX.
I`m trying to remember which connector it is for the power on, otherwise the control will not power on. It still sounds to me like you have a short somewhere and that your masterpcb is ok
Regards,
Alexfanuc

[Swemill]

Thanks for your reply!
There actually wasn't any big WAM! My fault and a bad explanation... The bang was exactly like when you usually push in the emergency stop. Not any "failure"-bang like burnt electronic! The sound was like the contactor sound that normally sounds when pushing the emergency stop, and i'm 99% sure that it was that despite that i didn't push it..... Seems that the failure forced it into emergency circuite and the CRT also went out....
There isn't any burnt electronics smell and i cant find any visible failure either....

I have also tried what you said after i wrote the former thread. Only CRT/CCX cable (and them on top) connected but still no difference....
Also tried without the PC2, Add Mem. and PC1 board but with no difference...

I'm very grateful for help!

/Swemill

[alexfanuc]

Here are some files to see if they can help you.

Regards

Alexfanuc

[Swemill]

Thank you very much for the files Alex! That can be useful!

Regards - Swemill

[alexfanuc]

Check this file.
Regards
Alexfanuc

[Swemill]

Great! Thank you very much!