Cadet Mate OSP700M

[Antonio Arguijo]

Good day!
Someone could help me please?
I have an alarm in a OKUMA machine Cadet Mate OSP 700M control:
1-1 CPU-ALARM BUS ERROR (SYSTEM BUS)
BUS ERROR STATUS (SBER,SBPAR,CYO,O,PRT,DIA,LOP.ECC)=80
SSW= 0105 ACCESS ADDRESS=FC1000FC

The led SREB is on at the MAIN1 BOARD
I've tested the boards (Main1, Main2, Mem, SVP, etc) in other identical machine and worked.
I've changed 3 fiber optic cables damaged, but the problem continues.
I've changed the power supply but the problem it's the same.
Somebody have an idea what's happening?

[Algirdas]

1. changing main board is risky. Take care, let the machine boot nothing else
2. alarm says it is bus error. So, check the bus
3. No main 24V on this alarm, all optical interface devices are off.
Nothing is on, by the way, on this alarm. It's just system monitor.

[Antonio Arguijo]

That's means that the monitor it's damaged, or some cable?

[old timer okuma]

The access address tells the story on this type alarm. the FC1 part of the address indicates the problem is in the 2nd SVP board. try swapping it.

[Antonio Arguijo]

Thanks for your help, in fact I've find that the problem is the second SVP board part number E4809-045-158-B.
I've find a replacement version C, do you know if are compatibles?
That's means part number E4809-045-158-C