usually on these older mitsubishi projection TVs you remove the grill cloth and behind you will find a panel with screws, remove the screws and carefully pull out the panel, it will have the convergence adjustment PCB mounted to the other side, you will see multiple trim pots for making all the different adjustments to your red green and blue convergence, aswell as a few other adjustments.If you are lucky you can look in the TV where you just pulled out the convergence adjustment board and may see the focus block where you will be able to adjust screen and focus, if not you will find it by removing the back and following the focus wire from the LOPT/FBT to the focus block, you can also make crude focus adjustments right at the lense of each CRT by loosening the wing nuts and rotating the lense back and forth untill you get the best point.Hope this helps.Let me know if you need more info, I have done lot's of work on the projection style TVs