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ZENITH 25LC20 COLOR

copy29_ZENITH 25LC20
copy29_ZENITH 25LC20
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   THIS WAS A SCORE FROM AN ETF CONVENTION.  AS FOUND, THE CRT CHECKED GOOD.  I FOUND OUT LATER THAT I WOULD BE DISPLEASED WITH THE CRT. 

  THE SOFT START WENT AS USUAL, UNTIL I ENABLED HIGH VOLTAGE.  I HAD NO VERTICAL.  WHEN I GOT IT ON THE BENCH, I FOUND OUT WHY.

  SOMEONE CLIPPED COMPONENT LEADS IN DIFFERENT SECTIONS, WITH VERTICAL GETTING THE MOST OF IT.  I DID A FUNCTIONAL RECAP OF THE SWEEP SECTION AND THE VERTICAL RETURNED.  I MADE NEW INTEGRATING NETWORKS AHEAD OF TIME.  I ALSO RESTUFFED THE CANS SINCE THE DOUBLER WAS DEAD AND THE REST OF THE LYTICS DID NOT REFORM TO MY SATISFACTION. 

  ONCE I GOT SWEEP TO MY SATISFACTION, IT WAS TIME FOR COLOR.  I HAD NONE.  WHY?  CLIPPED COMPONENTS I HAD MISSED EARLIER.  I RECONNECTED THEM AND GOT COLOR.

  I ALSO HAD HIGH VOLTAGE ISSUES.  THE 3AT2 WAS NEAR DEAD AND THE HORIZONTAL OUTPUT (6HF5?) WAS ALMOST DEAD.  THE REGULATOR WAS ALSO NEAR DEATH.  THESE GOT ME HEALTHY HIGH VOLTAGE. 

  IT WAS TIME TO PUT THE CHASSIS BACK ON ITS OWN TUBE.  PROBLEM!  I HAD ALMOST NO RED.  THE CRT CHECKED GOOD ON ALL THREE GUNS.  I BELIEVE G2 HAS A BROKEN CONNECTION.  I'M NOT SURE IF IT'S IN THE SOCKET OR INSIDE THE GUN.  I SWIPED A CRT FROM ANOTHER SET AND GOT THE PICTURE YOU SEE ABOVE.

  NOT LONG AFTER PUTTING IT ON DISPLAY, BLUE HORIZONTAL CONVERGENCE WENT SOUTH.  THE LEFT BLUE CONTROL ON THE CONVERGENCE BOARD WAS TOAST.  I HAD A DONOR BOARD THAT GAVE ME A GOOD CONTROL.  I RECAPPED THE BOARD AND REPLACED THE SHORTED DIODES.  NOW, I HAVE A DECENT PICTURE.

  THIS IS THE OLDEST ZENITH COLOR SET I HAVE.  MY DESIRE TO GET THIS DONE CAUSED ME TO FORGET TO GET CHASSIS SHOTS.  NEXT TIME I OPEN THIS UP, I'LL GET AFTER SHOTS.