V9938 -> V9958 upgrade problems

Page 2/2
1 |

By msxlegend

Master (174)

msxlegend's picture

12-02-2013, 23:18

I have tested and all works on a monitor and old TV Wink
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 Smile

By msxlegend

Master (174)

msxlegend's picture

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

Paragon (1713)

Daemos's picture

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 (174)

msxlegend's picture

23-02-2013, 22:46

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

By Daemos

Paragon (1713)

Daemos's picture

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.

Page 2/2
1 |