CNC Control "Grundig Dialog 11" Schematics or Info

[FelixLer]

Hello Friends,

currently i have a problem with my CNC Mill and i am trying to fix it. I am at the point that i need a Schematic of the CNC Control. Does anyone have a Schematic of the Grundig Dialog 11 CNC Control?
Any info or documentation about it would be helpful.
Or does anybody know whre i can get Info like this?

Furthermore, how do i spot an defective EPROM?
Thanks in advance

Felix

[ace1903]

I don't have any documentation but based on pictures from the net , machines of these ages usually have problems with capacitors.
Check power supply, a dried capacitor can introduce lot of noise in a digital circuit. Some capacitors can make power-on reset circuit or watchdog circuit to generate
signals with improper timings.
What is the problem you are facing? Does it show coordinates? Maybe completely dead?
Defective EPROM can cause self check at power up to fail. Does it show some error code?
 

[Haenk]

Judging by the pictures, most SPS PCBs seem to come with a battery pack, I assume the system will not work if the voltage is too low.
That's just an idea, without further error description or schematics.