Here are the curves when adjusting L17 (1st Color Amp Plate Coil) for min and max 3.08mc response:
Also for reference below are the responses when adjusting L19 (2nd Color Amp Plate Coil) which is used to minimize the 3.58,mc response, pics showing min, middle, and max adjustments:
In looking over the full color alignment directions the Zenith manual notes to perform the color amplifier alignment first via adjusting L17 and L19 as the color sync alignment will be affected. Also interesting that SAMS alignment directions are the opposite and have you do the color amplifier alignment last.
Question how much affect will the remaining alignment affect the color amplifier response? I am curious if there is an issue with the color amplifier circuit or if the issue is further misalignment. I might pull the chassis and double check to ensure I didn't make any repair mistakes. The earlier posted schematics highlights replaced parts, mostly way out of spec resistors and then film capacitors.
Note there are a couple of suspect ceramic capacitors that in-circuit measure over the 10% spec:
- C54 - .0047uf 10% 500v measures .003739uf 20% low, maybe an issue?
- C55 - 47pf 10% N75 500v temp measures 54pf 16% high probably good if I pull a lead to measures
- C59- .001uf 10% 1kv measures 840pf 16% low, also maybe a problem?
- C61- .001uf 10% 1kv measures way high probably getting in parallel capacitance somewhere