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Old 06-14-2014, 01:50 PM
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Reece Reece is offline
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Join Date: Jul 2004
Location: Cleona, PA
Posts: 2,178
Fixed it!

This afternoon I decided to check voltages as Zeno suggested. Some were there, some weren't around Q462. Jungle chip IC270 showed near 0.6V on pin 36, horizontal output, the way it should. That feeds over to Q501, video output, which feeds the HOT. Q501 is supposed to have 33.4 volts on C and it had nuttin'. It's fed through T504 the horizontal output xfrmr which gets its 129V through Q400 reg and ultimately from pin 4 of the STR30130. I checked continuity from C on the video output to the xfrmr and it showed open. I remembered when soldering in that transistor that the pad and trace were a little flakey. I soldered in a jumper and tried the set; it came to life! No sparks, no smells, no smoke. This is out in the shop with no cable so I hooked up a Zenith digital-to-analog box and rabbit ears and watched a number of channels. All looks good. The heat-sinked devices were just a little warm after running for twenty minutes.

I will cook this for a while and monitor some voltages over the next days when I am in the shop before buttoning it up. Thanks to all who made suggestions in the past.
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