How to get into Service Mode

Hey guys, I have an older Panasonice Rear Projo TV that still works great, however lately I've started noticing that I've got some colour (red to be specific) bleed. I've gone through the regular convergence in the main menu, but cannot seem to fully correct the bleeding.

I've been reading up, and know there is a service menu which has MORE options and a better convergence menu, but I cannot find any info on how to get into the Service Menu Mode. Please help.

My tv is: Panasonic PT-53WX54J. Its a Canadian Model, which might have been an exclusive to Best Buy (which is were I purchased it new approx 6 years ago)

I should also mention that 99% of the viewing is done through the digital input. My main video souce is cable tv, which is coming from my SA8300HD PVR, outputted to my Panny through an HDMI to DVI cable. Tv is mainly on the Digital input, and this where I'm seeing the red colour bleed to the right.