nesdev.com
http://forums.nesdev.com/

Center-only horizontal retrace on CRT TV
http://forums.nesdev.com/viewtopic.php?f=5&t=15910
Page 2 of 2

Author:  Fisher [ Tue May 09, 2017 5:47 am ]
Post subject:  Re: Center-only horizontal retrace on CRT TV

pubby wrote:
Maybe they screwed something up when they fixed it.

Sure I will, I had not had enough time or disposition to disassemble and work on this :-(.
mikejmoffitt wrote:
If there are bias controls for the individual guns, you can try turning those up after turning down the screen control on the flyback to counter the crushed dark colors that you'd get from turning down screen.

Nice tip. Looks like the simplier path!
I think I'll need to recalibrate the RGB settings on the trimpots if I take this path.
How difficult is this?

Author:  Fisher [ Sun Jul 22, 2018 3:41 pm ]
Post subject:  Re: Center-only horizontal retrace on CRT TV

Finally fixed!!
After I've got some high tension leak on the flyback, with lots of caution, I tried to fix it with an old rubber belt.
I'm not sure if that's totally safe, but after I saw some guys doing it with hot glue, insulatting tape and even plastic bags, I think I'm fine.
But just to be sure I'll look for a replacement as soon as possible, better be safe than sorry...
In a closer look to the CRT board, I discovered a bad solder joint on a capacitor between GND and Screen.
Resoldered it and problem solved!

Page 2 of 2 All times are UTC - 7 hours
Powered by phpBB® Forum Software © phpBB Group
http://www.phpbb.com/