Mitsubishi WS-48511: can't adjust blue convergence

Sounds like a convergence problem. See if you can adjust the customer convergence controls (in the menu).
If you can not adjust one or both the colors than your convergence amp is toast!

No,need to diagnose.It a 100% convergence problems.Convergence problems very easy diagnose.The picture look like 3D,colors lines don't lines up.Fuzzy,out of focus.Convergence controls don't work to lines up any colors cross.The tech is cheating u if he said cost $125 to diagnose.If u know how to solders u could fix this convergence problems about $100.U can buy a convergence kit at Websites Tv repair World.com,Tvrepairkits.com.The shop everythings fix parts and labors only $300.

you need the convergence IC's replaced.

This is a V-21 Chassis common, with these symptoms, for failure of the convergence amps. This set uses two STK 392-110 Sanyo amps mounted on a heat sink and hard to miss. They're a 40 pin ic about the size of a half pack of cigarettes.
It has also been my experience that two or more of the yoke return resistors need to be replaced, most commonly R8c21 and R8c22, both are 3.9 ohm 1w but test all of them for reliability.
Hope this helps!
Bill

William Rayburn, CET
Premium Technologies
PO Box 442
Long Beach, WA. 98631
360-642-4993
premtech@willapabay.org

replace stk ic in convergance block

i went to converge my mitsubishi ws 73903 and the blue line wont go down to match the other ones

Solder connects = temporary fix.......Replace IC's..best
order two STK392-570 good quality.....16 to 22.00 each
...............................T.

Replace R8c21 & R8c22 (3.9 Ohm 1 Watt) Ic8c00 Stk393-110 Mits. Part # 267p155010 (Use Sanyo Original)
Also Check F9a04 (5amp Pico Fuse) for open and replace if necessary.
Bill