KR5SixxR650 Mastering?

Hi,
I have 2 KR5SixxR650, 1st robot out of the box was tested ok, then about 1 month later the same robot got stuck at Cross3 :

open attachment

I clone the 2nd robot's HDD to a SSD and installed it to the 1st robot's controller which run through KSS fine, but when I tried to Master all 6 axes the only option available was EMT, the original KSS 7.XX of the 1st robot had DIAL option. The robots do not have any docs, so can anyone tell me what is the mastering position for KR5SixxR650?. Some small robots llike KR3 the mastering position is like this:

open attachment IMG_0201.JPG

The only notch can be seen is at A6 of Kr5SixxR650, I can't seem to find any notches on other axes, please advise.

thanks,

Robot info:
KR5 Sixx R650
KRC2SR
KSS 7.0.12

Thanks Herman!

I read the pdf and tried to master A1, Move A1 to approx. 5mm before the limit stop, then press master + forward tab, the A1 should stop somewhere between this 5mm gap but it didn't stop....do I have to take the cap screw off?

thanks

I took the cap screw away and master + forward key, did not master.

"EMT mastering distance exceeded":

open attachment.