Heidelberg QM DI 46-4 immaging problem

Hello members.
Any help.
First we have problem with power supply for computer on DI press.
We solve that with power supply from desktop computer supply.
Now when we want to make masters , all process go Ok but noting is on plates.
We can not make plates on HEIDELBER QM DI 46 CLASSIC (1997)
Please any help what is problem
Thank you

 

Hi sir:
I can strong test the following Power supply after the Main transformer T1:
1)board SVK3: +24vDC +5vDC Remember tolerance Not 0.7% up or down, otherwise replace or repair. the input is 32Vca
2) Test the Bridge Rectifier GRM24(2) : Input 37Vac from secondary transformer T1 :a) +48Vdc aprox for TTK b) GRM24(1)iNPUT 20vAC From secondary of trafo T1, rectify +28Vdc aprox for the feeder pile module SLT .
3) Power supply rack DI unit :-12Vdc +12Vdc +36Vdc +5Vdc a) If some of them is missin or out of tolerance, replace or repair, the Laser will NOT work and will NOT make plates, since that the Diode Laser work with -12Vdc
Please see your Schematic Diagram and use a good DMM.

 

Thank you Sir
The engineer is coming in Tuesday and will test all this.

Thank you again.
Regards