SH350D
If the tube was dead and the PSU died then you may have a cascade problem. Did you run the new tube on the old power supply?
Was the new power supply adjusted to put out the correct current (at default they pump 35mA, ie: more than enough to kill your tube)
How long is the tube? from memory the 350 won't take a true 50 watt without an extension so I'm betting it's an overdriven 40 watt
Bill's right, at this point it could be absolutely anything electrical in the machine and/or badly aligned optics
You did what !
The PSU never actually died; I replaced it in the hope that it would somehow magically fix the problem. The new tube (800mm) was used on the old power supply and the new one, and the machine ran exactly the same with both. I made no adjustments to the power supply.
Thank you very much for your help. I posted in the hope that it was some sort of, "Oh, this is the problem, and if you do A, B, and C, it will be fixed" type of problem, but clearly this is far beyond my realm of knowledge. I'm going to see if I can find someone locally who knows about these things to come take a look at it.
I will, thanks!
@800mm the tube is just about a 40 watt, that may be the base of all your problems if the PSU is pumping too much current
You did what !
If you replaced the tube (which used to cut properly) and didn't realign the mirrors, then I would suspect that the mirrors are the problem. Also, try to install an ammeter (amp meter) to make sure you don't exceed 20mA, which is the maximum that this tube is supposed to handle.
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