- Chinese 40W K40 problem- PSU or Laser tube??!!
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Chinese 40W K40 problem- PSU or Laser tube??!!
Hi,
My cutter has been running fine for a year, but just recently it suddenly lost cutting power. Even with the dial turned to 100 the mA needle barely moves to 5, it used to be able to go right the way to 30 When looking at the tube and pressing the test button there is some purple plasma. I can't see any obvious cracks to the tube. The power supply fan is spinning. So my dilemma is, is it the tube or the power supply? All opinions are gratefully received!
Cheers!
john
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