V9938 -> V9958 upgrade problems | MSX Resource Center (Page 2/2)

Master (176)

12-02-2013, 23:18

I have tested and all works on a monitor and old TV
But I have fixed the shift by doing set adjust(7,0) !! I have tested with 2x100nf in // and 100K . I'm waiting for my 220nF capacitor !!
Thanks for all

By msxlegend

Master (176)

23-02-2013, 17:43

It works on monitor but I think it's not exactly 220nF because on LCD, screen move. I have a problem with video composite. Screen is white and black. Nobody could help me to fix the synchro exactly ??
Thanks for your help

'Legend

By Daemos

Prophet (2052)

23-02-2013, 21:42

Try some different values. It may be different for you. Use a trimmer and keep turning it until you get a good image. Thats how I fixed it.

By msxlegend

Master (176)

23-02-2013, 22:46

anderstood
i try to change values of the resistor or the value of the capacitor ?

By Daemos

Prophet (2052)

24-02-2013, 00:00

test both. Take a capacitor. Lets say you start with 220nF then add a variable resistor of lets say 250K ohm connect this. Turn your MSX on, adjust the resistor until you see perfect image. Then measure back the value of the trimmer and add that value in with normal resistors. You will be good to go from then.