Thank you, John. Those 2 or 3
par cans stay on (although extremely dim) even when X and Y are down to zero. They only go out when I kill the master. Are you saying that if I move those pots up slightly they may go out? How would I go about cleaning or fixing a defective pot?
Frank
First check to make sure nothing odd is loaded in memory. Best way to do that is to default the board (
clear memory) back to factory settings, then run the board in it's most basic single scene mode (X scene), with a 1 to 1 patch. (
Fader 1 =
Channel 1) See if clearing the memory got rid of the problem. If not, note which channels are not at zero, and which faders are in control of them. next, move those faders up to about 10% and confirm that those channels have come up to 10%. then take those faders back to zero. Apply slight pressure side-to-side on the controls and see if the lamps extinguish. If they do, then those faders need cleaning. If nothing stayed on when you were using scene X, then
switch to scene Y and repeat the test.
Faders can be cleaned using a contact cleaner designed to clean volume controls. Sometimes moving the
fader a few times around the trouble spot will fix the problem, sometimes they need a squirt of cleaner, and in some cases the controls need to be replaced.
Remember, the diagnostic
stage is your most important
stage, and is usually the only one that does not require money to be spent.
If you have got bad faders, you should
send the board in for service. The dissassembly is not for the faint of heart as most two scene boards like that have the controls soldered into a board that covers everything, and requires a lot of patients to
effect the repair.
