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Main => Monitor/Video Forum => Topic started by: Mimatt on September 23, 2009, 11:54:38 pm

Title: Capped my WG K4600, still have really bad foldover.
Post by: Mimatt on September 23, 2009, 11:54:38 pm

(http://i177.photobucket.com/albums/w232/diskoboy1974/wg4600prob1-1.jpg)

I've re-capped it. Checked all the soldering, adjusted every dial I can find, everything seems to be ship shape.

The color and picture look as sharp as it did in 1981 - the part you can see, anyway... But as you can see, the left side of the screen has really bad foldover. If I adjust the width any higher, the right side folds over too. I also can degauss my tube, there is still discoloration in the lower left side of the screen.

Is this a width coil problem, a HOT problem, or should I re-cap all the brown film caps? I can't find any flaws in the tube or neck.

Title: Re: Capped my WG K4600, still have really bad foldover.
Post by: Ken Layton on September 24, 2009, 12:05:59 am

So you already recapped these boards on the monitor:

main board

XY (hor/ver) board

video interface board

power supply board

And you still have foldover? Then replace both vertical output transistors on the XY (hor/ver) board.

Title: Re: Capped my WG K4600, still have really bad foldover.
Post by: Mimatt on September 30, 2009, 06:31:58 pm

I don't have much electrical repair experience beyond capping a monitor.

Which two are the vertical output transistors? Are those TR306 and TR352?

Title: Re: Capped my WG K4600, still have really bad foldover.
Post by: qrz on October 03, 2009, 07:15:43 pm

double check caps for correct polarity.
 then recheck:
c306 2.2uF/50v
c303 47uF/50v
c310 22uF/16v


qrz