I AM familiar with the internal workings of the Lexel PSU.
I've made a Powerpoint on troubleshooting Lexel current cards. You have a defective current card feedback section. It starts in light because the low voltage power supplies on the current card are working and powering the light card. I'm at work, I'll post the power point when I get home. Probably need to replace one of four socketed parts or a defective switch. Its easy.
Right now because you've started in light mode but have no lasing, the PSU is running the tube at full current NEAR OR ABOVE the Emergency Overcurrent trip point. This is hard on the tube as the factory sets the upper light limit 4 amps above the normal upper current limit. I'd fix the CC card before going further or before setting up for lasing.
Did you set the taps on the three phase transformer per the tap chart in the manual?
Steve
Last edited by mixedgas; 02-09-2015 at 10:36.
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