First post, by Arkanix
I got a second 5151 with a recent purchase and it has a Horizontal Linearity issue. Text is stretched on the LHS of the screen and compressed on the RHS of the screen.
I have tried adjusting coil L504 and this does alter the Linearity somewhat but the RHS stays considerably more compressed than the LHS.
I suspect that C505 may be a potential issue (18uF 25V non polar electrolytic), as it measures 23uF out of circuit. I unfortunately don't have an LCR meter to test it properly. The original manual and the Sams ComputerFacts Guide suggests a 47uF 50V non-polar cap would suit this purpose.
Has anyone here come across this problem or could provide advice?