I have an older (1990) JVC direct view 31", model AV-3150S. I need to touch up the alignment (the corners are a little out of focus) and was wondering if this model has an on-screen service/alignment mode accessable through a button-press sequence, or if I have to pull the cover and tweak the pots. Can one of the 'sperts in the forum help me out?? I need this TV to last just a little longer until I can afford one of the new DLP RPTV's coming out soon!!