The NEW Build Your Own Arcade Controls

Main => Monitor/Video Forum => Topic started by: kardenm on November 01, 2011, 02:25:24 pm

Title: WG 19K7203 no horiz wdth adj
Post by: kardenm on November 01, 2011, 02:25:24 pm

Here's another! (yes, they're piling up). 
This is a Wells 19K7203 which was working fine after I repaired many bad solder joints.
Now, the picture has expanded horizontally and the horiz size adjustment has no effect.
Any hints??  Thanks!

Title: Re: WG 19K7203 no horiz wdth adj
Post by: ed12 on November 01, 2011, 04:25:54 pm

vr105 and vr106

ed

Title: Re: WG 19K7203 no horiz wdth adj
Post by: kardenm on November 18, 2011, 11:38:03 am

Thanks ed12.  Definitely not these pots.  They work fine.

Must be some component in the horiz section.  Cap maybe?  Wonder what typically causes this "overscan" in the horiz direction?

Title: Re: WG 19K7203 no horiz wdth adj
Post by: fredster on November 18, 2011, 12:54:02 pm

I'm not real hip on the 7200 series, but the horizontal width coil is adjusted on older ones. There is a few mylar caps that need replaced in those.

Start here maybe : http://therealbobroberts.net/wc.html (http://therealbobroberts.net/wc.html)

Title: Re: WG 19K7203 no horiz wdth adj
Post by: sarge on November 18, 2011, 01:32:14 pm

Check Q603 2SD669

Title: Re: WG 19K7203 no horiz wdth adj
Post by: kardenm on November 18, 2011, 02:45:52 pm

Thanks.

No width coil on this one.
Q603 tests good as well as R625, C601, and D601 and 602 which are the components the guy at Wells tech support told me to check.  
 :badmood: