:scratch2: Should I unscrew the black sub-plate under the faceplate in a SX-3900 where the pots and most of the switches are attached to access them and deoxit them? Will I be able to separate this black sub-plate enough from the main unit to do the work with all those switches, pots and wires that are attached to it without endangering the unit? Should I disconnect anything before separating the sub-plate a little from the main unit so nothing gets damaged/broken? I had never opened a receiver in my life, was good with basic car mechanics back in the day but never delved into electronics apart from installing a CD Receiver in a car by myself and soldering a few wires in the process. Thanks for any help in advance, you guys have a great forum going on here!