Hi cr0sh
Thanks for quick response
I make some measurements on the high-voltage block and I think the fault is in the high voltage transformer (high voltage rectifier is good) or with or without him I have a strange noise coming from the transformer, I measured the pulse frequency signal on the High voltage transformer and is not stable , varies between 4.2 and 4.7 kHz (I think this should be at 15kHz) , without high voltage rectifier frequency signal climb to 7-7.5 kHz but it is not stable. now I looking for a transformer (model: TEHNOTION 4022 73 971 369 9839) I don't know if easily find or only from Fluke factory. Do you knows a source of spare parts for Fluke ? I have to repair Fluke 45 and needs analog to digital converter device (error 8) ....
I will tell you the news that appear on this oscilloscope
WBR
Costas