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Old 06-24-2019, 08:42 PM
trinescope trinescope is offline
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Join Date: Jun 2005
Location: Arlington, TX
Posts: 163
So far I restuffed the FIVE electrolytic cans on the main chassis (I thought there was four, but then another B+ resistor started smoking and I found the fifth can). Then I powered up the set without horizontal output tubes and verified the sweep oscillators. I had to replace the coupling capacitors at both the vertical and horizontal output tube control grids since there was excessive positive voltage on the grids. Next I installed the horizontal output tubes and everything seemed OK. Lastly I tried installing the CRT assembly back in to see if I can get a raster, but no go. I found normal voltages on the CRT cathode, G1 and G2 and some semblance of high voltage (slight static cling holding paper to the CRT faceplate). No abnormal light show in the CRT neck, either, so that's still a really good sign. Next step is to get a proper HV probe so I can verify the HV, focus, and convergence voltages.

One of the candohm resistors decided to short to the chassis, so I need to find a solution for that. It feeds power to the sound section, so for now it is disconnected.

EDIT: Actually my G1 voltages are a bit high, but that should cause the CRT to go to maximum brightness anyway. Will have to replace coupling capacitors in the chroma adder section for this. Had to go to the Sams folder to find CRT electrode voltage readings.
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Last edited by trinescope; 06-24-2019 at 09:00 PM. Reason: G1 voltages were actually high
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