[R-390] R-390a modified IF sub-chassis

[Larry H]

Gary, welcome to the wonderful world of the R-390.
That's an interesting looking module.  I have not seen it before.  I believe it is connected to a 33k 2/5 watt res and the 1000 mfd cap.  I can't tell where the other ends of the res and cap are connected to, or any of the module wires either.  If you could identify any of their connection points, that would be a big help.
You are wise to replace C553 before powering it up.
Regards, Larry

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