how to rotate the image on naomi uni screen?

[philbee]

is it possible to rotate image on naomi uni screen?? ive been setting up my screen using the pots but i notice when i play bubble bobble that the screen is slightly tilted to the right, now i find im noticing it on other games too, guess now im just looking for it

[grantspain]

its possible your yoke has moved from the home position

[philbee]

thanks for the speedy reply, anyway of moving it back to the home position?

[thegreathopper]

thanks for the speedy reply, anyway of moving it back to the home position?

I have rotated the yoke on a brand new monitor when it was wrong out of the factory but I would not want to do it on a old one in case the yoke breaks apart.

[philbee]

is there much involved?

[grantspain]

very simple process,first you have to loosen the yoke retaining clip,its normally a jubilee clip at the very back of the yoke.
carefully using a mirror you twist the yoke until your pic is straight-WARNING there are some voltages on the yoke so either twist using the plastic housing of the yoke or use some marigold type things
do not over tighten the retaining clip when you have the correct position or you will crack the tube

never attempt this without using a mirror and be careful of tube breakage and high voltage

very rare for a yoke to slip so in my opinion your yoke is almost certainly loose at present,this implies someone has **** around with this at some point

[philbee]

will check it out, thanks for the info

[philbee]

ok, there are two clips, one holds the assembly of what look like plastc arms sticking out and the other is clamped onto the main tube, which one shold i open and move?

[grantspain]

upload a photo of the picture so i can see exactly whats going on,and also send a photo of the yoke so i can mark the retaining clip

[philbee]

here ya go

[grantspain]

you know i do not think your yoke has moved,try adjustments vr458 and vr456 on the main chassis
you have a sanwa 29es31s btw,you can tri sync this if you want

[philbee]

just out of curosity, whats its native freq, i thought it was tri-sync by default.

[grantspain]

31khz only