I went in and measured all of the parts in the color amp and burst circuits, pulled leads where needed. All of the coils and transformers seem to measure ok via resistance and inductance measurements. All resistors and capacitors are in spec except the following:
- C54 - .0047uf measures 21% low
- C59 .001uf 1kv - measures 16% low
- C61 .001uf 1kv - measures 18% low
The only other thing I noticed is the 2nd color amp tube socket appears in poor condition, its the wafer style socket and its bowed down. I will do some further continuity tests while wiggling and also will try to wiggle the tube once I get the chassis back in place. I will replace the above capacitors and report back. Also getting at the 8.2K damping resistor is a real pain, I'm a bit surprised replacing this with a 100K test resistor was part of the Zenith service manual alignment process. Note SAMS simply skips this step.
12-31-2023, 08:41 PM
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