I have just bought a trk-3d88 and having some problems with the sound. Sound seems to be ok when i select radio and dubbing on the select switch when i move switch to tape and cd line in the sound is very quiet. Now if i move the switch half way between radio and cd line in i start to get some good sound coming from the cd line in. Im i right in saying it looks like the select switch might be the problem, i have seen other posts saying about cleaning the switch would this help, if so how do i go about cleaning it. I have taking the unit apart and located the select switch how do i clean, do i have to take the whole switch of the circuit board to get to the switch or is there an easy option and what do i clean it with would really like some help hope someone can thankyou.