I am trying out my new PGM90 and notice that setting the selector to the bridge pickup in the last position gives a significant hum, more than in all other settings. Generally the hum is a bit louder on all settings than on my other Ibanez guitars but this setting is a lot louder. So I'm not a guitar tech but hope there is an easy fix for this. I opened up the cavity and I saw that this little wheel is in between the bumps (look at the photo's) on all settings except the last one which is the bridge pickup. Does it have to do with this or is it something else. Help is much appreciated!
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