"Both" control boards? The MX/VX series has a single motherboard running horizontally across the top of the pack, the older LD series (six
channel units) had two separate ramp cards off to the left.
Which channels are out? If it's every third
channel (ie: 1, 4, 7, and 10), then you might be lacking
power on one
leg (assuming three
phase input
power), or the
fuse on the motherboard for that
phase's sensing
circuit is blown, or perhaps the motherboard isn't fully seated in the
connector.
If you need answers in a hurry, I suggest calling
Leprecon at (888) 422-3537.
The sensing
circuit fuses are small red boxes to the left of the motherboard, they're not hard to replace if you're good with soldering on
circuit boards. I don't remember off the top of my head if there's a glass
fuse in the back of the pack for each
phase, one of them blowing would produce the same
effect.
Don't be wandering about inside the
dimmer pack with the
power on, or at all, for that matter, if you don't feel absolutely comfortable that you know what you're doing. There's plenty of places you could get zapped by one, two, or all three phases. Find a service center if you're not familiar with
electrical safety practices.
