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Tom C. is right. This set doesn't not have AGC per se. However, the contrast control varies the gain of the RF amp and the 1st, 2nd and 3rd IF amplifiers. You might also trouble shoot the DC restoration circuit as it applies DC bias directly to the CRT grid and could affect brightness directly. There is an electrolytic (C5 on the SAMS) that could affect this circuit.
Last edited by Tom9589; 12-04-2018 at 08:57 AM.
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